<!-- Title: 14:08:05  Sat Oct  4 2003 -->
<!-- Crewchief: Phil Schlabach -->
<!-- Op1: Sal Rappoccio -->
<!-- Op2: Muge Karagoz Unel -->
<!-- Op3: Dale Stentz -->
<!-- Op4: (Ingyin Zaw  -->
<!-- Op5: George Ott -->
<!-- Op6: others..) -->
<!-- Notes: -->
<pre>New elog, it's getting very long.</pre>


<!-- Date: Sun Oct 5 19:35:24 2003 -->
<center><a href='/elog/notebooks/cmx/Sun_Oct__5_2003_193415.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-169' ></a><a href='/elog/notebooks/cmx/Sun_Oct__5_2003_193431.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-171' ></a><a href='/elog/notebooks/cmx/Sun_Oct__5_2003_193442.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-173' ></a><a href='/elog/notebooks/cmx/Sun_Oct__5_2003_193457.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-175' ></a></center>
<!-- Author: Dale Stentz -->
<!-- Comment: Sun Oct  5 19;47;18 comment by...Dale Stentz -->
<pre>Captions for each plot (left top to bottom right):

plot 1: typical sample signal of the ECL signal at the TDC crate for the NW miniskirts.

plot 2:  This appears to be a double signal.

plot 3:  This is a very weak signal.  It turned out that this chamber was by-passed and that this was a weak signal.  Please note (as deminstrated by plot 4) that the frequency of these "crapy" signals was &lt; .5 Hz - in otherwords very slow.  Width between crossing is much smaller than in plot 1.

plot 4:  The above plots all were 'freeze frame' plots of the occiloscope trace.  Here is a running plot where old sample signals are the less intense lines.  Note that this shows that the frequency is very quick.  

Often times we now average over the last ~4 samples - this provides a much more stable trace as in plot 1.</pre>


<!-- Date: Sun Oct 5 20:10:11 2003 -->
<pre>CMX update on Shutdown work: 
 
Work on the NE: 
 
We insturmented all of the NE miniskirt, organized, and put the covers on.  The system hasn't triped (except for when a shv cable was not completely locked in) and is currently holding HV.  We found the spare HV cable in the counting room.  In addition, we found that the bad drift shv HV cable worked after the ends were redone.  Many thanks go to the techs who helped us get this setup. 
 
We looked at signals and found 8 dead signals (out of 94 chambers).  One of these the signal wire was torn off the board (an all too frequent problem).  This board was replaced.  Another board must have been repaired from before as we discovered that the signal wire was not connected to the right spot on the board.  This was replaced and we gained another signal.  The 6 remaining dead signal were shown to not have signals at the level of the preamp board.  The continuity of the wires was tested (except for one) and any obvious problems (signal wire not connected, etc.) looked for.  At first we replaced the radikas but this failed (the radikas were tested later and shown to be working).  We replaced two of the anode antenna wires.  One still was dead but the other now works.   
 
This leaves 5 remaining problems.  We will try to solve these on Monday by replacing the board and/or the anode attenna.  The good news appears to be that any ASD problems in the NE are very small.</pre>
<!-- Author: John Strologas, Jason Jarrell, Vladimir Rekovic, Ingyin Zaw, George Ott, Dale Stentz -->


<!-- Date: Sun Oct 5 20:28:28 2003 -->
<pre>CMX update on Shutdown work:  
 
Work on the NW: 
 
NW has been holding HV for well over a week now without any troubles.  Orginally we had a large number of dead channels via testing at the TDC outputs.  17 dead guys in a row were found to be due to the cables at the ASD/transformers coming partially out.  We switched a card and rechecked all the connections, etc.  The current status is that one channel in wedge 19 has bad leg (looks crapy) and doesn't get inverted.  This would effectively show up as a dead channel.  It is very possible that this chamber which is realtively isolated from the other two by-passes in the wedge may be left as is for the fear of taking it out and replacing it with another board might do more harm than good.  We will make a desicion by this upcoming Wed. (10/8). 
 
Wedge 18 (which had its ASD board replaced with the one that we orgainlly put in there) has no dead channels.  However, there are two conserns.  First TDC #13 (for the NW miniskirts) has a thin width [the crossing signals are a factor of 2 less in width compared to a healthy channel].  We will look at the YMON plots to see if this is effectively a dead channel.  The 2nd consern is that TDC #20 fakes (it is by-passed) by giving a very thin width ECL signal.  Most likly we will tell the software to ingore this channel.   
 
Plots of these signals will come soon (next weekend?) - new YMON plot assuming they take a long comsmic run and YMON consumer is working will also come shortly.</pre>
<!-- Author: John Strologas, Jason Jarrell, Vladimir Rekovic, Ingyin Zaw, George Ott, Dale Stentz -->


<!-- Date: Sun Oct 5 20:55:49 2003 -->
<pre>CMX update on Shutdown work: 
 
Update on SE: 
 
CMP and CMX SE miniskirts were signed off on having A/E gas flush & flow over the weekend.  (Please note that the same system of having a deadicated gas line for the Miniskirt supply has been used as used in the NW and NE.)  Steve Hahn locked out our HV pods for the SE.  The locks will come off sometime Monday with any luck.  Tests on the first 5 degrees will be conducted on wedge 16 of the SE on Monday.  There were 10 dead channels before the shutdown.  Most likly 5 of these are fixed by new radicas the others have to be tested and examined closer.  We checked the signals via the TDC outputs using George's pulser and concluded that there were no ASD or signal cable problems.  The reamining problems may be related to the problems on the NE.  We will find out Monday. 
 
Update on the SW: 
 
The miniskirt will be inserted sometime around the 20th of Oct.  Before then we will push to have every possible detail for getting it up and running planed out.  In addition, we will test the signal cables + ASD using the test pulser. 
 
ASD conserns: 
 
Testing now runs with the default set of signal cables.  As a result we are effectively shifting the TDC numbers by 8 so that each 30 degree section fits on just 1 complete TDC slot (this is the case for the NE and NW).  According to Phil there is a hard ware assignment somewhere which will not like our switch.  As a result we can not just change the TDC mapping. 
 
For reasons which the 'new CMXers' don't understand the needed 2 signal cables for each corner (NE and NW and most likely the SW) are not there.  This is consistant with the fact that there were only 2 ASD boards in the SW and we only recovered 3 from the NW and NE durning the previous access.  Luckly we only need 3 more boards which only need the first 8 (for 2) or the last 8 (for 1) channels to work.  Unluckly we have to put in the set of 6 new signal cables for each corner (all but SE which has these already). 
 
Current count of the ASDs suggest that we have 2 'good' boards.  We will likly keep these for the SW (or purhaps the NW see above) as spares and try to 3 additional ones for the 8 channels. 
 
We noted that the ASD for the Keystone is still in the NW ASD crate and that this is a potenial spare.  It would be realtively easy to pull it out without upseting any other ASDs.</pre>
<!-- Author: John Strologas, Jason Jarrell, Vladimir Rekovic, Ingyin Zaw, George Ott, Dale Stentz -->
<!-- Comment: Mon Oct  6 09;51;22 comment by...Muge -->
The story about the cables and asds:
the asds are easy: the 10 degree sections should have been missing from the crate,
since they were never intended to be in. so, it is not a mystery that all the other wedges (whether taken out from the crate during last shutdown and put back in again now, or not) had all the time corresponding asds but each 10 degrees is missing the place (2 per side). What i find mysterious is the missing cables.
My recollection is that they should have existed, i remember many dangling cables around, so they were the ms ones then.. Shall we ask this to Abraham whose memory is more respected in this regard? He had spent tremendeus effort for the cabling and maybe  there was only time to plug in only the very first finished wedge: the se ms.. At least he can give us some ideas to make life easier....



<!-- Date: Wed Oct 8 20:17:55 2003 -->
<pre>5 preamp boards were fixed. 4 had an anode wire missing which I just soldered back in; 1 had an anode wire soldered in the wrong place (wrong hole) which I moved. I took 3 back to my office after inspection. On 2 the 22 ohm resistor was marked as bad. On 1 of these it looked ok from the pin to the back end of the resistor. On the back side, there were indications of a cold solder joint on the anode wire. I would have expected this channel to work. But I will resolder the anode wire. On the other, the 22 ohm resistor looked bad. I will replace it. The third has a short from -12 to ground which I verified.</pre>
<!-- Author: Phil -->


<!-- Date: Thu Oct 9 10:46:35 2003 -->
<center><a href='/elog/notebooks/cmx/Thu_Oct__9_2003_104535.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-178' ></a><a href='/elog/notebooks/cmx/Thu_Oct__9_2003_104559.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-180' ></a></center>
<!-- Author: Dale Stentz -->
<!-- Comment: Thu Oct  9 11;00;00 comment by...Dale Stentz, Ingyin Zaw, John Strologas -->
<pre>Long cosmic run with 4822 events on Wed Oct 8.  Unfortunately only the NW was on at this time.  A plot with the NE on will be looked for although we may have to wait until the end of the gas flushing and wait for another long cosmic run.</pre>


<!-- Date: Fri Oct 10 12:17:30 2003 -->
<pre>Update on CMX work durning access:  
 
NW miniskirts continue to hold HV. New SW HV cables for channel 7 have been partially inserted. The SE miniskirts HV was turned on. Wedge 17 was fine but wedge 16 had a ~70 microA current on the anode which is super high (expect ~.2). This will be investigated later.  
 
Dead channels were investigated on wedge 17 SE miniskirts.  Two signal wires were simply not connected, two others had board problems (see Phil entry above), and the other has a definate ASD problem as the test pulser confirms.  
 
The NE definately had a gas leak. We by-passed two chambers and now supply = return. We found out that the 4 dead signal chambers had nothing to do with the gas leak. If fact we discovered that the 4 chambers were connected with each other (in 2 pairs self-connected).  Now thoes are in series with the other chambers in that 5 degree section. All CMX HV has been turned off for the upcoming gas flush of all the muon systems. They were locked out Thursday (10/9) morning.  System should be unlocked next Monday after the recovery from the brief power outage.</pre>
<!-- Author: John Strologas, Vladimir Rekovic, Ingyin Zaw, Dale Stentz -->
<!-- Comment: Fri Oct 10 12;36;45 comment by...John Strologas, Vladimir Rekovic, Ingyin Zaw, Dale Stentz -->
<pre>The gas leak problem was discussed with Del Allspach and Steve Hahn this morning.  A Caution tag has been placed on the cover of the 5 degree section which says to not connect chambers 2 and 4 to gas/HV.  For clarity these by-passes are

Side=East
Wedge=18
Layer=5 (aka stack)
Wire=2 and 4 (aka layer)

CMX Work continues on many other fronts:

We have installed signal cables for all needed corners (SW, NE, NW).  All that remains is to connect to these to the "10 degree" ASD boards.  We switched the ASD which had a bad [not dead-bad level] channel to the open miniskirt slot in the SW.  This is because the bad channel (# 6) is not important as only the last 8 channels are needed to work.  This board was quickly tested - last 8 are good to go.  A good ASD board (from the test stand area) was inserted into the SE.  Very possible that a lot of switching will go on until the boards are in the right possition.

Working on the ASD crates is realtively easy in the NE but extremly painful in the NW and SW.  It should be noted that there is an ASD for the keystone in both the NW and SW crates.  This gives us two potenial spares in addition to the other 2 good ASDs up in the testing area.

Work continues on getting the ASDs where they need to be and then hooking up the signal cables.  

T-minus 2 weeks until the insertion of the SW miniskirts.


</pre>


<!-- Date: Sun Oct 12 15:50:06 2003 -->
<pre>We put in the final set of signal cables and we went a head and hooked up all signal cables &lt;-&gt; transformers &lt;-&gt; ASDs. 
 
Here is the history of all the switching of the ASDs:  (the #s are written down won't be looked up here) 
 
SE wedge 17 --&gt; SW wedge 15 
'good' spare --&gt; SE wedge 17 
NW wedge 19 --&gt; NE wedge 20 
NW wedge 18 --&gt; NW wedge 20 
NW wedge 5 (keystone) --&gt; NW wedge 18 
'good' spare --&gt; NW wedge 19 
 
After a final check of all the cables, we should be able to turn on the NE and NW and check for signals.  On the SE we have to get the 1st 5 degrees to hold HV on the anode.  In addition, we have not been able to look at the massive current draw problem on the rest of wedge 16 on the SE.</pre>
<!-- Author: John Strologas, Vladimir Rekovic, Ingyin Zaw, Dale Stentz -->


<!-- Date: Tue Oct 14 12:48:05 2003 -->
<pre>Update on work durning access: 
 
HV test looked at the SE.  We found that the large current draw is due to the 2nd 5 degree section of wedge 16 in the miniskirts.  It has not triped but then again it has not been left on for a long period of time.  No obvious suspect for the problem.  Highly likly that we will redo the insturmentation. 
 
The 1st 5 degree section of wedge 16 on the SE has not triped and has been holding off and on for about a day.  The problem with the 2nd 5 degrees will be given priorty over this as it seems to be working.  Both covers will likly remain off for some time. 
 
The NE wedge 18 miniskirts triped around 2:30 AM today.  No obvious cause - the rain and therefore the humidy is a possible thing to blame.  Otherwise the NE is holding fine.  We also looked at signals on the NE.  There was 1 problem for both wedges - possible ASD problem.  This will be looked at a later time. 
 
The SE had several new troubles despite switching the ASD card with one that was tested in the ASD teststand area.  Curiously, the exact same problems on one of the channels (where we switched an ASD board) was spoted again.  We strongly think that this may be a TDC channel problem. 
 
10 days left until the SW miniskirt is inserted.</pre>
<!-- Author: Dale Stentz, Ingyin Zaw, John Strologas -->


<!-- Date: Tue Oct 14 15:25:47 2003 -->
<pre>I looked &lt;a href= 
'/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=4&frame=2&anchor=15:47:43'&gt;wedge 21 W which seems to be hot&lt;/a&gt;. While I figured it was oscillating, that doesn't seem to be the case. What I see looks more like a dead ASD.  I don't see any hits at all.The levels on the ECL lines are not right (they are both close to zero). I suggested to Dale and Ingyin to look at the ASD for this slot. I am a little puzzled as to why this manifests itself in such a way.</pre>
<!-- Author: phil -->
<!-- Comment: Tue Oct 14 15;26;45 comment by...ps -->
<pre>&lt;a href=
'/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=4&frame=2&anchor=15:47:43'&gt;link&lt;/a&gt; </pre>

<!-- Comment: Tue Oct 14 15;27;35 comment by...tired 8am rep -->
<pre>ok, i give up</pre>


<!-- Date: Tue Oct 14 15:53:31 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-181&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-181  width='300' align='top'></td><td>calibrations show 21W as dead not hot which it also strange</a></td></tr></table>
<!-- Author: ps -->
<!-- Comment: Wed Oct 15 09;03;41 comment by...Ingyin Zaw, Dale Stentz -->
<pre>This is ok.  We noted in the shift elog but not yet in the CMX that we took out the ASD for wedge 21.  We will fix the blown fuse today or sometime soon.  The ASD is up in the test stand area.</pre>


<!-- Date: Wed Oct 15 09:11:59 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-182&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-182' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-183&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-183' width='300'></a></center>
<!-- Author: Ingyin Zaw, Dale Stentz -->
<!-- Comment: Wed Oct 15 09;23;19 comment by...Ingyin Zaw, Dale Stentz -->
<pre>Basic features of CMX in the above ymon plots via run 171137 (cosmics) are all understandable.  
5-6 are dead on both sides (keystone not on and no physical wedges)
15-17 on the west is dead because the SW has not been inserted.
the shape in the NW miniskirts (18-20) is what you would expect due to the number of channels in each.
21 on the west does not have an ASD
14 on the east was on stand-by (wasn't holding yesterday)
15 SE miniskirts doesn't have its cables in as does all but the last 8 channels of 16
17 has a hot channel (see occupancy plot)
We think that maybe 18 should be lower than 19 for the NE miniskirts but these details will be investigated using all of the info in the occupancy plot with our other tools.
</pre>


<!-- Date: Thu Oct 16 20:12:00 2003 -->
I looked at the cathode HV problem in 14e. <a href= 
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=865&frame=2&anchor=15:45:04.322'>Conclusions</a> in the CDF elog.
<!-- Author: Phil -->
<!-- Comment: Fri Oct 17 12;20;23 comment by...ps -->
<a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=868&frame=2&anchor=12:07:49.434'>more from the cdf e-log</a> 


<!-- Date: Fri Oct 17 17:39:17 2003 -->
<pre>Update on CMX work durning access: 
 
Work on wedge 14 east will pickup on next Monday (10/20).  Currenly HV is still off and the entire SE CMX is getting N2. 
 
NW wedge 21 triped once durning the week.  Hasn't triped again and since this is the bottom of the arch someone may have touched it etc.   
 
The NW miniskirts are holding voltage well.  For reasons which are not clear, long periods of time without HV seems to actup some troubled chambers into becoming bad chanmbers.  The good news is that now there is no fluctuation in the current and the NW has been holding voltage (this has never been a problem for wedge 19 - only wedge 18 had the pre/post insetion problems).  The bad news is that wedge 18 now has 12 by-passes making it 75% efficent. 
 
The NE has not triped at all and remains strong.  The SE (w/o the 1st 5 degree's section being by-passed; e.g. both wedges) has yet to trip.   
 
ASD board from wedge 21 west remains to be fixed.  The +5 volt fuse was blown.  No other signs of damange.   
 
We switched the ASD which was in the wedge 15 spot for the SW miniskirt back to the wedge 17 spot in the SE.  Currently the SW still has the vaccancy.  There is one suspected ASD problem on another asd board in the SW (wedge 17, TDC#=48+24).  This board will likly be repaired or possibly switched to the wedge 15 spot. 
 
The ASD that we took out of the SE had 8 bad channels.  4 channels had bad ECL levels to boot.  We retested it - passed all the tests - the 4 bad levels looked normal and not dead.  Extremly odd. 
 
We have 1 good spare ASD board upstairs and 1 (assumed good) ASD in the keystone slot in the SW.  Several boards have one or two channel problems (at least 3 are being used for wedges 15 and 20 for which we only need 8 good channels. 
 
In total we fixed 5 bad channels by replacing the preamp boards for the dead signals found in the SE miniskirt.  This does not include the 8 channels that were recovered after we switched the ASD board back.  In every case above, the board had a good radika, there was continuity in the signal wire, and the anode HV signal antenna had signals.  Even though the SE was being flushed with N2 we had enough A/E to get enough gain to look at signals.  It appears that all 5 were recovered.  We will test this via the Occupancy plots and TDC outputs, etc. next week. 
 
There is one remaining problem on the SE miniskirts which is a messed up channel due to a bad TDC (or bad cable from ASD to TDC).  This is TDC# = 48+6. 
 
We checked the signals (now twice) at the TDC crates and found that both the NW and NE miniskirts are perfect (# of signals = # of active chambers). 
 
The SW miniskirts will be inserted in &lt;1 week.  Currently we are retesting the HV.  Its holding with V_cathode = 2.9 kV and V_anode = 4.0 kV.  Currents are as expected.  Part of next week will be spent on all the prep work for the SW miniskirt.  </pre>
<!-- Author: Ingyin Zaw, Dale Stentz -->
<!-- Comment: Sun Oct 19 14;36;47 comment by...Dale Stentz -->
HV remains on except for SE CMX arches but including SW miniskirts out in the hall.

The NW CMX gas seems to be reading a low flow.  Details noted in shift elog:
<a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=872&frame=2&anchor=22:57:30.117'>
First here, </a> 
<a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=873&frame=2&anchor=04:04:05.821'>
then here, </a> 
<a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=874&frame=2&anchor=11:46:34.103'>
and here. </a> 


<!-- Comment: Mon Oct 20 08;38;50 comment by...Dale Stentz -->
<a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=875&frame=2&anchor=22:32:11.304'>
 Also here. </a> 
<!-- Date: Mon Oct 20 07:53:55 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-184&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-184' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-185&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-185' width='300'></a></center>
<!-- Author: Dale Stentz -->
<!-- Comment: Mon Oct 20 07;56;39 comment by...Dale Stentz -->
<pre>Latest occupancy plot from the long comic runn (run #171456) with 11775 events.  Note that wedge 21 in the NW should be empty (no ASD) and the SE arches + CMX should be empty due to N2 and/or no HV.</pre>



<!-- Date: Mon Oct 20 15:44:57 2003 -->
<pre>NW miniskirt tripped this morning. I reset it.</pre>
<!-- Author: ps -->


<!-- Date: Tue Oct 21 10:37:29 2003 -->
<pre>Argon ethane flow to SE should begin shortly. I signed the relevant form.</pre>
<!-- Author: phil -->


<!-- Date: Tue Oct 21 11:05:21 2003 -->
<pre>In the occupancy plot from Sunday pasted here, there seems to be a dead region at the low phi end of 13w which I don't expect to be there. Anybody know anything relevant?</pre>
<!-- Author: Phil -->
<!-- Comment: Tue Oct 21 12;24;57 comment by...John Strologas, Ingyin Zaw, Dale Stentz -->
<pre>We are working on the ASD crate on the SW and discovered (as we thought) that the realvent signal cable + transformer to ASD was not connected 100%.  Most likly this came out when putting in / pulling out the ASD for wedge 15.  

Currently we are doing some ASD swaps.  A "good" ASD spare has been put in to the slot for wedge 17 (which had 1 ASD like problem durning previous testing).  Another ASD which had know problems in the bottom channel 01 was put into the vacant wedge 15 spot.  Were betting that the card we took out will be something that we can quickly fix.  In addition, the SW gives us the oppertunity to "really" test the status of the 2 inserted boards.

We have also undertook the task of re-doing the way that half of the signal cables hang down to the ASD cards.  We hope to retest the signals via the test pulser and see if all the ASDs for the SW miniskirt are ok (for the SW arch we will just wait for a cosmic run).</pre>


<!-- Date: Tue Oct 21 12:44:15 2003 -->
<pre>CMX work durning yesterday's [10/20] access: 
 
SE arch work: 
 
Gas techs (Dean and co.) helped afix the broken gas nipple to the chamber by using the 'grey' epoxy.  We also fixed the other chamber's nipple end which was bent and too sharp (bent it back) and put on new gas tubes for both areas.   
 
We did a HV cathode test on each of the 4 chambers closest to the end.  3 of them behaved typically while the other which had clear damange (not just bent) to its resistor pack on the face of the chamber held a much smaller current (by a factor of &gt;4) and a wild current change (+/- 75%).  This chamber will be temporarily by-passed.  We will attemp to fix it after the rest of the SE checks out (we would need to reflush with N2 and get the necessary JHA, etc.). 
 
We had 3 out of the 4 protective shielding put on the NW, NE, and SW arches ends.  We will put on the last one for the SE arch once we have properly put on the cover and fixed the structure which supports the HV feeds for wedge 14 SE.</pre>
<!-- Author: John Strologas, Ingyin Zaw, Dale Stentz -->
<!-- Comment: Tue Oct 21 12;49;10 comment by...John Strologas, Ingyin Zaw, Dale Stentz -->
<pre>We also found that the SW miniskirt seemed to trip around this morning.  Both wedges triped.  We investigated and found that our extension cord was barely in the socket and not the way we had left it before.  Most likely someone triped on the cord and plugged it back in. </pre>


<!-- Date: Wed Oct 22 14:39:37 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-188&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-188  width='300' align='top'></td><td>Problems in SW</a></td></tr></table>
<!-- Author: Phil -->
<!-- Comment: Wed Oct 22 14;42;36 comment by...ps -->
related to <a href=
'http://www-cdfonline.fnal.gov/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=5&frame=2&anchor=11:05:21'>yesterday's work</a>?
<!-- Date: Wed Oct 22 14:40:43 2003 -->
<table><tr><td><a href=/elog/notebooks/cmx/Wed_Oct_22_2003_144038.ps align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-190  align='top'></td><td>more on SW</a></td></tr></table>
<!-- Author: Phil -->



<!-- Date: Thu Oct 23 13:06:23 2003 -->
<pre>Date: Thu, 23 Oct 2003 13:01:41 -0500  
From: Del Allspach &lt;allspach@fnal.gov&gt;  
Subject: SEX HV  
To: schlabach@fnal.gov, hahn@fnal.gov  
X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0)  
Importance: Normal  
 
 
Hi,  I have signed off on allowing high voltage to SEX chambers. Please 
notify personnel working on this subsystem.  - Del Allspach</pre>
<!-- Author: Phil Schlabach -->
<!-- Comment: Thu Oct 23 13;26;47 comment by...Phil Schlabach -->
<pre>Steve Hahn has removed the locks. I reinstalled the cables. I think I've got them right, although the miniskirt cables might be reversed.</pre>

<!-- Comment: Thu Oct 23 16;29;39 comment by...Ingyin Zaw, Dale Stentz -->
<pre>Cables look all good.  HV holding on the SE including wedge 14.  No unstable or high currents.  Started at 15:09 - holding without trips since.</pre>


<!-- Date: Thu Oct 23 16:48:16 2003 -->
<pre>Yesterday we put in the ASD for wedge 21 in the NW.  We're waiting for long cosmic run to verify that it works.   
 
We also retested all the signal cables for the SW miniskirt.  We found that the wedge 15 and 16 boards are perfect but there is 1 (diffrent from the previous board) ASD problem on the needed channels for wedge 17. 
 
We attempted to solve the oscillations problems in the SW for wedges 10 and 7.  We shutoff the LV for the SW but this did not have a strong effect (oscillations before and after 2 attemps). 
 
Today we were able to get at wedge 10 (with the cap closed) and we moved around some of the signal cables.  We are waiting for a new YMon plot via long cosmic run to see the results.  Our initial look at the TDC outputs showed no oscillation behavior, thus we believe it to be fixed.  
 
With the HV turned on for the SE CMX we looked at the SE miniskirts to double check our previous fixes.  Everything looks perfect except for the one known TDC problem.  As a result, the NE, NW, and SE miniskirts are working as they should.</pre>
<!-- Author: Ingyin Zaw, Dale Stentz -->
<!-- Comment: Sun Oct 26 14;11;45 comment by...muge -->
<pre>Hi , did you check the asd for 21w in the test stand after you 
replaced the blown fose of last week? i hope we do not figure out more problems in the crate rather than in the test area, that may occur beetween fuse blowing and replacing it back in.</pre>
<!-- Date: Fri Oct 24 09:25:18 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-191&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-191' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-192&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-192' width='300'></a></center>
<!-- Author: Ingyin Zaw, Dale Stentz -->
<!-- Comment: Fri Oct 24 09;28;47 comment by...Ingyin Zaw, Dale Stentz -->
<pre>Short cosmic run this morning.  No more hot channels in wedges 7 and 10 (see previous YMon plots above).  Need more stats to say something else more meaningful.</pre>


<!-- Date: Fri Oct 24 18:53:50 2003 -->
<pre>Update on CMX work during access: 
 
We checked the HV on keystone wedge 5 and found that it trips on ramp up at about 2.4 kV on the cathode.  We will attempt to search out the bad chambers and by-pass them.  Wedge 6 is holding normal HV since 18:30.  The voltage values are saved on iFIX.  Current read I_drift = 387 microA and I_anode = .5 microA. 
 
We also changed the threshold values on the NW, NE, and SE miniskirt ASDs to -1.00 V.  Note that this is the value as read on the card.  The real value is #/10 so threshold = 100 mV. 
 
As we noted in the evening shift e-log, there were 2 occasions when the anode filter boxes were damaged (on the SE and NW).  There was no real damage and nothing triped but the boxes were 'opened up'.  We were able to bend it back but the potential for serious damage remains.  </pre>
<!-- Author: Ingyin Zaw, Dale Stentz -->



<!-- Date: Sun Oct 26 15:30:23 2003 -->
<pre>Update on CMX work over the weekend: 
 
We devoted some more time to the keystone.  We tried powering up wedge 5 (which trips on rampup before) in two pieces.  Both sections trip so there is at least two bad chambers.  In addition, there is already a section of 8 chambers (1 stack) which are all dead.  Thus we turned our attention to wedge 6.  We by-passed the board and all assocated chambers with board # 06-11.  Note that one chamber does not physically exist and two are on the wedge 7 extension on the arch.  As a result we just by-passed this one chamber - it is unknow whether it is bad or good but this was nessary so that we could test the rest of wedge 6.   
 
The plan is to get the 'normal' part of wedge 6 (11 out of 12 boards = 44 chambers) up in running.  Then we will worry about the extra chambers physically assocated with wedge 6 but are apart of wedge 7 and vice versa.   
 
Since our modification wedge 6 has not triped and is holding at nominal voltage (started at 14:30 10/25/03).  Abraham Gallas's notebook suggested that wedge 5 was in bad shape and that wedge 6 was not much better. 
 
We took out 16 old style radikas and put in 4 good ones.  In addition we put in the signal cables to the ASD and pluged in the low voltage (LV).  We attempted to be gready and look at signals at the TDC outputs but we saw no signals.  We were fairly certain that we put in the corect LV cable in the supply in the SW crate.  Thus we suspect a blown fuse.  "Wise" CMX experts are needed to figure out how we are suppose to get to the LV box located halfway up on the brown keystone steel support. 
 
Needless to say Keystone work is very slow.  For the most part only one person can do the work and it is non-trivial to do the work at such hieghts.  In addition getting at the start of wedge 6 (at 90 degrees in phi) is additionally hard because of the beam pipe.  Nevertheless, we believe that there is enough time to get most of wedge 6 going. 
 
The SW miniskirt continues to hold HV.  The likly date for insertion is next Tuesday (10/28) - the HV will be turned off and HV cables put out of the way so that it is ready in case it is needed on Monday.</pre>
<!-- Author: John Strologas, Ingyin Zaw, Dale Stentz -->


<!-- Date: Mon Oct 27 08:43:43 2003 -->
Odd "software over/under voltage" problem in the BMU, CMU, and CMX.  See <a href= 
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=897&frame=2&anchor=02:34:13.502'> 
shift e-log for info. </a>  
 
We have increased the HV on wedge [west] 6 to 2.9 and 5.5 kV for the cathode and anode, respectively.  It (along with the rest of CMX) held voltage throughout the weekend.
<!-- Author: Ingyin Zaw, Dale Stentz -->


<!-- Date: Mon Oct 27 13:12:45 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-193&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-193' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-194&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-194' width='300'></a></center>
<!-- Author: Ingyin Zaw, Dale Stentz -->
<!-- Comment: Mon Oct 27 13;21;35 comment by...Ingyin Zaw, Dale Stentz -->
<pre>Best cosmic run we could find over the weekend.  Wedge 10 and the very start of 11 are hot.  Suspect oscillations.  Cable will be adjusted - we are likely to remove at least one cable ("in the middle") and look to see the results.  Better cosmics are needed, but basic features are correct.</pre>


<!-- Date: Mon Oct 27 16:50:57 2003 -->
<pre>After the Fire Alarm which occured today, we saw that SE miniskirt wedge 16 ("15" on iFix), triped.  No entry into the elog when this happened (I suspect it happened during the alarm).  We'll do a quick inspection and see if there was anything that might have caused it. 
 
Wedge 6 (SW keystone) is holding voltage again.  ~10 open radika spots remain which are all near phi = 90 degrees.  We have enlisted Phil (a 'lefty') to pop in the remaining ones (at the very least the far 8) in to the preamp boards. 
 
The reason for the modified radikas is that the keystone (as I'm told) had the same oscilations problems as the miniskirt (just as bad).  Wedge 5 has many by-passed chambers but wedge 6 seems to have none and is holding HV (+100 V above normal operational voltage). 
 
Phil talked to Dervin and Rob about how to get to the LV box for wedge 6 (which most likly has 2 blown fuses).  There is a 2 person stand (e.g. a supported steel floor) that is close enough to allow a person to safely climb and get access to the box.  The only question is how to reach this support.  The 'blue' extension lift might do the job but it seems that it might be short by a long step or short jump.</pre>
<!-- Author: Ingyin Zaw, Dale Stentz -->
<!-- Comment: Mon Oct 27 20;36;13 comment by...lefty -->
I think it tripped before the fire alarm as I made <a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=898&frame=2&anchor=15:06:33.033'>this entry</a> in the cdf e-log.


<!-- Date: Thu Oct 30 06:30:13 2003 -->
<center><a href='/elog/notebooks/cmx/Thu_Oct_30_2003_062802.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-196' ></a><a href='/elog/notebooks/cmx/Thu_Oct_30_2003_062819.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-198' ></a><a href='/elog/notebooks/cmx/Thu_Oct_30_2003_062856.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-200' ></a><a href='/elog/notebooks/cmx/Thu_Oct_30_2003_062915.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-202' ></a><a href='/elog/notebooks/cmx/Thu_Oct_30_2003_062928.ps'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-204' ></a></center>
<!-- Author: Dale Stentz, Ingyin Zaw, John Strologas -->
<!-- Comment: Thu Oct 30 06;43;44 comment by...Dale Stentz -->
<pre>Here are some unique signals via the TDC outputs for CMX.

Going left to right

Figure 1:  (also see Figure 3) This is the a bad TDC signal.  Note that this behavior can also be due to an ASD not making a 'leg' correctly.  

Figure 2:  Here is a channel that is 'faking' signals.  In other words the YMon occupancy plots show hits but the chamber is in fact by-passed.  Special care will be needed so that we can igore it.  The exact reason for the faking is currently unclear.  We hope that attaching a grounding cord might help.  

Figure 3:  see figure 1.

Figure 4:  A good channel but there are oscilations.  Notice that the effect is realtively harmless but there is the potenial for several other small crossings after the signal goes back to baseline.  The last indication was that this problem went away after some probeing.  

Figure 5:  A really good signal - averaged over 512 samples.</pre>


<!-- Date: Thu Oct 30 06:50:43 2003 -->
Unfortinately wedge 19 on the NE miniskirt triped several times throughout the night.   
 
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=905&frame=2&anchor=20:07:08.206'> 
See here </a> and <a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=906&frame=2&anchor=03:21:34.119'> 
here </a>  for the shift elog. 
 
When the first triped occured we ran down and looked in the area and found no outside trouble maker.  It seem to come back fine but then started to act up around 3:00 AM today. 
 
An investigation will follow shortly.
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->


<!-- Date: Thu Oct 30 07:46:40 2003 -->
<pre>Update on CMX work durning access: 
 
The keystone wedge 6 was holding HV well but we quickly found that the LV was not working.  We orginally concluded that the fuses were bad but we now beleive (after careful inspection) that the fuses are not in the box.  Exactally why the fuses were taken out in addition to the realtively easy to access LV supply faceing the happy side of the crates on the CMX is unclear.  Regardless, we have a fairly good idea how to get to the stand but we need either to get the proper training or get help from Rob & crew. 
 
Currently we have 2 bad "board sets" (in other words 8 chambers coming from 2 groupings of boards).  [Note that there were other problems orginally but these were resolved with a new board or new radika (legs were bent).]  We orginally thought that there was something wrong with the board (ASD was unlikely), but we choked.  We forgot to test to make sure it wasn't the ASD and more importantly to see if it might be the cable it self.   
 
Our later testing showed that both sets of 4 were bad again but when we switched signal cables we then saw 4 good channels (same preamp board - differnt cable / ASD path).   
 
Here is the current status of the keystone [wedge 6 west]:   
 
44 chambers (out of a possible 47) holding HV. 
 
36 good signals at the TDC outputs 
 
4 known dead signals from signal cable [cable is bad or ASD is bad] 
 
additional 4 known dead signals but not checked but switching with a new signal cable 
 
Note that we actually had 2 trips on wedge 6 after we replaced some of the preamp boards.  We quickly tracked down the problem area.  One of the black connection joints on a chamber was not flush with the surface of the chamber.  This caused the drift/grid/cathode jumper not to be connected.  This was likely caused when we inserted the new preamp boards.  It was quickly fixed by pushing back into place.  The chamber by itself held at V_drift = 3.1 kV for +5 min.  Before when it triped it triped on ramp up ~1.0 kV.  Then the entire system was retested for another +5 min.  Currents in both cases were as expected.  The keystone came back when HV was restored from upstairs.  Note that in testing the signals at the TDC we have to use a single power supply to test each board 1-by-1.  This had the possitive benifit of having the HV be turned of and on many times but also the disadvantage of wasteing a lot of time.  We hope to fix our LV problem (i.e. we don't have any) soon. 
 
The game plan is to figure out exactally what is bad (ASD, signal cable, TDC, etc.) and to go from there.  In addition, we had some nasty trips on wedge 19 in the NE miniskirts.   
 
There are 3 possible causes of the trips on wedge 19.  First, a chamber went bad durning the "burning in" of the chambers.  This seems unlikly but this is always a possiblity.  Second, something was droped or somehow interferes with the setup.  This will be the first thing we check.  The third major option is that the HV cable that goes from the CAEN supplies in the counting room to the crates in B0 on the arches went bad.  This is a realtively strong possiblity as I think this cable was bad before. 
 
The SW miniskirts are suppose to go in on this Friday.  It is ready to go.</pre>
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->
<!-- Comment: Thu Oct 30 10;54;37 comment by...phil -->
Documentation of the <a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=74&frame=2&anchor=16:10:49'>problem with the NE miniskirt cable HV cable</a> during the Jan. shutdown. 
<!-- Comment: Thu Oct 30 23;14;10 comment by...phil -->
<pre>as I look backwards:  I have the training, perhaps not the will.</pre>
<!-- Date: Thu Oct 30 09:35:12 2003 -->
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=907&frame=2&anchor=09:33:22.397'> 
We switched HV cables to allow us to test the cables for wedge 19 on the NE miniskirt.  </a> 
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->



<!-- Date: Thu Oct 30 16:29:13 2003 -->
<pre>We tried to track down the HV trip on wedge 19 on the NE miniskirt. We switched the SHV cables for wedge 18 and 19 at the crate in the counting room. It tripped on wedge 18 so we determined that the problem was with the cables. We put the SHV cables in the counting room as they should be and switched the SHV cables for wedge 18 and 19 on the crate in the collision hall. We turned the HV on around 11:30 am and it's been holding ever since. 
 
The SHV cables on the crate in the collision hall are still switched. 
 
Wedge 6 [west], the keystone, tripped. When we looked at it, we saw that 2 annode jumpers were broken. We replaced them. We switched signal cables for 6-04 with 6-02 and saw that 3 out of 4 channels were alive and one (top chamber) was dead. We replaced the radika for that chamber and retested. It was still dead. The continuity of the resistors was ok. We switched the signal cables back. We switched the top and bottom cables going in to the ASD card for the keystone (slot 2). We only had time to check 6-04. All four channels were still dead, which indicates that the signal cable is bad (instead of the ASD).  
 
The ASD cables are still switched. 
 
Phil noticed that the resistor pack on one of the exposed chambers on the south end of the NW miniskirt was bent. The miniskirt did not trip but maybe we should check that chamber on its own for HV.  
 
</pre>
<!-- Author: John Strologas, Ingyin Zaw -->
<!-- Comment: Thu Oct 30 20;52;48 comment by...phil -->
<pre>to finish the story, Trevor and I were working at that edge. Trevor thought he heard a spark and when I looked I could see a grid resistor pack bent back almost to the grid board. I'm surprised it didn't trip. Before we bend it back which could damage it (as it did on the SE), we should just consider putting a layer of Kapton underneath. To be continued...</pre>


<!-- Comment: Thu Oct 30 22;29;09 comment by...ps -->
<pre>SE=14E</pre>
<!-- Date: Thu Oct 30 21:23:43 2003 -->
<pre>I brought some tags from across the road and put them on the desk downstairs. Please tie one to any bad preamps you take out with any comments you have. We can then track things as we work on them, and they work better than post-its. If you need more, TD will provide them. (Let's hope not.)</pre>
<!-- Author: phil -->




<!-- Date: Thu Oct 30 23:36:39 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-205&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-205' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-206&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-206' width='300'></a></center>
<!-- Author: Dale Stentz -->
<!-- Comment: Thu Oct 30 23;46;02 comment by...Dale Stentz, Ingyin Zaw, John Strologas -->
<pre>Not many long runs.  Here is one form 10/30 - run # = 172550.

Still an oscilation problem in wedge 10 which seems to 'leak' to wedge 11.  We hope to fix this quickly Friday morning.

The NW miniskirt seems to have a much large occupancy relative the the east miniskirts and the rest of the CMX.  This feature did not seem present in other plots that we looked at a day ago so we'll wait until we see something again.

No hits in wedge 20 and only the first 8 in 19.  This is expected as we had HV wedge 19 off an on as it triped over night.  

No other problems/conserns are obvious.</pre>


<!-- Date: Fri Oct 31 06:26:38 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-207&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-207  width='300' align='top'></td><td>Low stat cosmics.  However, there does not appear to any problems in wedge 10.  This seems to have happend once before (i.e. after we thought we fixed the problem then we see a plot where the re-occilation surfaces and then a later plot shows no problems).</a></td></tr></table>
<!-- Author: Dale Stentz -->


<!-- Date: Fri Oct 31 16:52:39 2003 -->
<pre>SW miniskirt is (finally) inserted. We hooked up the gas lines and all of SW is being flushed with N2. The HV is locked out. The plan is to keep flushing with N2 over the weekend and to test for leaks on Monday. After that, they can flow Ar/Eth and we can get HV back. The scintillator people are installing scintillators.  
They plan to be done by Monday. We organized the rest of the cables.  
 
The NW miniskirt wedge 18 (closest to the SW miniskirt) tripped, 
probably because the scintillator people are working between the  
two miniskirts. We left it off for safety reasons.  
 
We tested the 01 and 04 on the keystone wedge 6 with the cables   
(into the ASD) switched. No signals were seen from either so we  
think the signal cables are bad. We put the cables going in to the ASD board back the way they should be. 
 
We taped a bottom cover at the edge of wedge 7 west (next to the keystone) because it was hanging loose and we did not want it to  
fall on people or equipment. 
 
The NE miniskirt wedges did not trip since we switched the HV cables yesterday (at the crate in the collision hall). We switched them back to where they are supposed to be. We will leave them that way to see how long the HV holds.</pre>
<!-- Author: John Strologas, Ingyin Zaw -->


<!-- Date: Sat Nov 1 07:06:57 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-208&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-208  width='300' align='top'></td><td>Small/medium size cosmic run from run # 172824.  Note that the SW is off.</a></td></tr></table>
<!-- Author: Dale Stentz -->


<!-- Date: Sun Nov 2 04:58:53 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-209&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-209  width='300' align='top'></td><td>Hits in west wedges 7, 8, and 9.  Only problem is that these guys (in fact the entire SW) is off due to purging/flushing of the SW miniskirts.</a></td></tr></table>
<!-- Author: Dale Stentz -->


<!-- Date: Sun Nov 2 08:06:29 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-210&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-210  width='300' align='top'></td><td>Solid cosmic run (durning my shift).  SW HV off</a></td></tr></table>
<!-- Author: Dale Stentz -->


<!-- Date: Mon Nov 3 12:38:35 2003 -->
<pre>The reason for the &lt;a href= 
'http://www-cdfonline.fnal.gov/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=5&frame=2&anchor=23:36:39'&gt;  
high occupancy in NW CMX overnight Thursday&lt;/a&gt; was probably a stuck source in the calorimeter.</pre>
<!-- Author: Phil Schlabach -->
<!-- Comment: Mon Nov  3 12;39;09 comment by...ps -->
<a href= 
'http://www-cdfonline.fnal.gov/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=5&frame=2&anchor=23:36:39'>link</a>


<!-- Date: Mon Nov 3 12:48:06 2003 -->
<pre>Dale sign off on the form saying that we knew A/E was going to be flowing in the SW CMX.  We are still doing some orgnaization of cables, etc. for the SW miniskirt.  As soon as we are locked out and given the green light we will power up the minskirt and check to see if there are any major problems. 
 
The NE did not trip over the weekend.  Just to be on the safe side we are going to test the spare SHV cable and have it hold voltage for a day or two. 
 
</pre>
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->
<!-- Comment: Mon Nov  3 12;59;37 comment by...Ingyin Zaw, John Strologas, Dale Stentz -->
<a href=
'/cgi/elog/elog.pl?nb=2003&action=view&page=919&frame=2&anchor=12:58:25.120'>
Changing cable. </a> 



<!-- Date: Mon Nov 3 13:45:33 2003 -->
Dan Cyr replaced the fuse holders and fuses for west wedge 6.
<!-- Author: Phil -->
<!-- Comment: Mon Nov  3 16;22;57 comment by...ps -->
<pre>Note that I took these out of one of the boxes on the floor in the alcove. (I left a post it on the box.)</pre>
<!-- Date: Mon Nov 3 13:46:36 2003 -->
      <pre>CMX gas flow</pre>
<!-- Author: Phil -->
<!-- Comment: Mon Nov  3 13;48;32 comment by...ps -->
<pre>Date: Mon, 03 Nov 2003 13:10:54 -0600 
From: Del Allspach &lt;allspach@fnal.gov&gt; 
Subject: AE to the SW CMX + miniskirt 
To: Rob Roser &lt;roser@fnal.gov&gt;, mlindgre@fnal.gov, hahn@fnal.gov, 
 dhahn@fnal.gov, "William J. Noe Jr." &lt;noe@fnal.gov&gt;, 
 "Craig W. Olson" &lt;colson@fnal.gov&gt;, "Dervin G. Allen" &lt;dervin@fnal.gov&gt;, 
 smoccia@fnal.gov, wagner@fnal.gov, cdf-ops-managers@fnal.gov 
Cc: dstentz@lotus.phys.nwu.edu, schlabach@fnal.gov 
X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) 
Importance: Normal 


This is to notify you that Argon-Ethane is again flowing to the South West
CMX + the attached miniskirt.


Conditions for high voltage approval will be evaluated in about 24 hours.


- Del Allspach</pre>



<!-- Date: Tue Nov 4 12:25:56 2003 -->
The miniskirt alignment and the measuring/making of the floor grateing will start this afternoon. Note that we used the nominal position as given in the CDF note that David Dagenhart suggested to us [I'll put the CDF note # as a comment below].  
 
We switch the spare SHV cable so that the orginal DRIFT CHANNEL 07 is hooked up normally.  No sign of trips in the NW miniskirt <a href= 
'/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=5&frame=2&anchor=16:52:39'> 
since we switched everything back. </a>
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->
<!-- Comment: Mon May  3 10;55;26 comment by...Dale -->
<pre>1/2 year later...
&lt;p&gt;
"The CMX Lower Section Wire Positions" - Patrick Lukens - CDF note # 5079
&lt;/p&gt;</pre>
<!-- Date: Tue Nov 4 14:19:29 2003 -->
<pre>Date: Tue, 04 Nov 2003 13:08:23 -0600  
From: Del Allspach &lt;allspach@fnal.gov&gt;  
Subject: HV approval  
To: Rob Roser &lt;roser@fnal.gov&gt;, mlindgre@fnal.gov, hahn@fnal.gov,  
 dhahn@fnal.gov, "William J. Noe Jr." &lt;noe@fnal.gov&gt;,  
 "Craig W. Olson" &lt;colson@fnal.gov&gt;, "Dervin G. Allen" &lt;dervin@fnal.gov&gt;,  
 smoccia@fnal.gov, wagner@fnal.gov, cdf-ops-managers@fnal.gov  
Cc: dstentz@lotus.phys.nwu.edu, schlabach@fnal.gov  
X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0)  
Importance: Normal  
 
 
High Voltage to the South West CMX + miniskirt is now permitted.  Please 
inform appropriate personnel. 
 
 
- Del</pre>
<!-- Author: Phil Schlabach -->
<!-- Comment: Tue Nov  4 14;20;39 comment by...ps -->
<a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=922&frame=2&anchor=14:12:09.654'>
Locks removed</a>, HV left off.


<!-- Date: Tue Nov 4 18:05:34 2003 -->
CMX miniskirts (all four) were aligned in their nominal spots. 
  We did this using CDF note 5079 [title: The CMX Lower Section  
Wire Positions, author: Patrick T. Lukens].  We assumed that Y  
values did not change from the center of the chamber (where the  
anode pin is defined to be) to the edge of the chamber.  From  
the CDF 'sticker' (center point) which defines x = 0 we measured  
to two convenient chamber edges.  For the left side [which we  
define as facing the center of the detector] this was layer 7.   
For the right side this was layer 6.  We made marks on the  
floor.  The measurment for the center going left was 4.06".  For  
the right side this value was 4.09".  We used a simple steel  
ruler to go straight down from the top-center of the edge of the  
chamber to the floor.   
 
Details:   
For the SW the cooling water pipes were too close so we stopped  
it about 1 cm short.  NW was fine but we had to move the CMP  
signal cables which now are above (on) the miniskirt  
(counters).   The SE went well.  The NE eventually was aligned  
but we had to remove a grey power cable.  We note that this  
cable went to nowhere.  This suggests that some poor soul got it  
stuck and left it there. 
 
The fuse replacement for wedge 6 (keystone) was successful.  In  
addition, we see signals in the keystone.  Special thanks goes  
out to Dan who climbed up and helped us out greatly.  We want to  
replace the two bad signal cables (in reality they come in sets  
of 6; so one set of 6 needs to be changed).  One of the channels  
for these signal wires is bad so we should net at least +7 more  
channels. 
 
We also see signals in the SW miniskirts which are holding  
voltage.  We see only one unexpected dead channel.  Because of  
our pre-testing, we know this to be a problem at the pre-amp  
board (radika, signal wire not connected, etc.).   
 
The cables for the SW miniskirt were very haphazardly bundled  
together.  This should be relooked at to make sure it is ok.   
 
We note for completeness that the SW miniskirt wedge 17 (16-17  
on iFIX) was overvoltage upon powerup.  Phil used his experiance  
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=923&frame=2&anchor=16:21:51.609'> 
to solve the problem. </a>  
 
Wedge 22-23 on the NE also tripped on initial rampup.  However,  
the arch was being moved out about this time and it came right  
back up so it is probably fine.  
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->


<!-- Date: Wed Nov 5 07:35:50 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-211&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-211  width='300' align='top'></td><td>CMX west wedges 7-11 are hot (suspect ocsilations).  See links below.</a></td></tr></table>
<!-- Author: Dale Stentz -->
<!-- Comment: Wed Nov  5 07;39;24 comment by...Dale Stentz -->
It seems that a lot of the SW CMX arches are read hot after the turn on.  This was noted in the shift elog several times:

<a href=
'/cgi/elog/elog.pl?nb=2003&action=view&page=923&frame=2&anchor=23:48:30.859'>
link 1 </a>

a href=
'/cgi/elog/elog.pl?nb=2003&action=view&page=924&frame=2&anchor=00:59:14.185'>
link 2 </a>

<a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=924&frame=2&anchor=04:40:53.231'>
link 3 </a>


<!-- Comment: Wed Nov  5 09;20;15 comment by...muge -->
<pre>Dale, could you put a 2-d occupancy plot,so we see which parts of wedge 7 is noisy? Is wedge 7 now linked to wedge 6? There was a bypassed preamp there due to oscillations, which used to cause many problems in the past..</pre>


<!-- Comment: Thu Nov  6 06;43;21 comment by...Dale Stentz -->
<pre>Wedge 6 is seperated in for HV and also there is no cross over.  Basically "wedge 7 physical" = top of the arch (which includes 2 chambers for wedge 6) has not been touched.

Via the 2d occupancy + TDC outputs we see hot spots start after the first 2 signal cables.  

At this point we have decided to systmatically go through and find the bad guys.  We have just enough time to do this on Thursday.
</pre>
<!-- Date: Wed Nov 5 11:54:15 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-212&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-212' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-213&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-213' width='300'></a></center>
<!-- Author: ps -->
<!-- Comment: Wed Nov  5 11;55;07 comment by...ps -->
<pre>2d occupancy plot per Muge's request: left max=0.02, right max=1</pre>



<!-- Date: Thu Nov 6 07:24:51 2003 -->
<pre>CMX update on access: 
 
The SW miniskirt had one unexpected dead according to our TDC checks.  We opened it up and found that the radika had a bad leg (bent up; not obvious until you pull it out).  Dale's notes suggest that he had to replace this board once upon a time and when he exchanged the radikas on to the new preamp board it must have been hurt then.  Historical note the number of times we have had to open up covers on the SE is much greater than all the other miniskirts combined.  George's testing of the preamp boards/radikas and the prep work in general greatly help to make the SW 'come around' the quickest.   
 
We looked at the keystone and switched the signal cable into the transformers (whiched looked ok).  The problem switched with the cable (thus ASD + transformers are good --&gt; cables are bad).  We have a spare CMX cable preped and ready to go.  Rob said that Dervin and the crew will help us out to get the spare cable up there.  Unless they are really gun-ho, we will most likely keep the old (bad) keystone signal cable up there.  We'll have to due some rearrangement but we think that it will be realitively easy to get the cable in the right place, etc. 
 
The major focus is to solve the osciliation problems in the SW (7-11).  It is extremly bad to say the least and we suspect at least 2 differnt problem makers.   
 
The details are somewhat boring so here is the basic procedure: 
 
Try to find the oscilation on one HV channel (e.g. west 7-8, 9-10, etc.).  Next the LV can be removed to see if we can limit it to just one wedge.  In both cases you look for when it stops oscilateing.  The theory being that now you know that it is where you turned off the power to.  From there (or if really needed for &gt; 1 wedge) we start removing signal cables.  We find that removing cables in sets of 4 is good (8 is sometimes too far to get all signal cables from a lift).  Thus we do a modified binary search.  The end result (hopefully) is one cable that when out we see no osccilations but when in we do.   
 
Currently we think that there are at least 2 problem guys.  Our last results were: 
 
with HV off for 7-8 and signal cable 10-05 out there are no oscilations.  This seems not to be true when we tried it from the control room (see elog at this time/date for more info).  We thought we might have the other possible problem down to 4 cables (07-02 to 07-05).  Obviousally we are going to try to break down the problem using HV and LV power options to help us know where to start. 
</pre>
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->
<!-- Comment: Thu Nov  6 07;42;59 comment by...Ingyin Zaw, John Strologas, Dale Stentz -->
Forgot to note that wedge 21 in the NW triped yesterday.  Its fine after we repaired a smashed cover.  <a href=
'/cgi/elog/elog.pl?nb=2003&action=view&page=927&frame=2&anchor=06:49:14.948'>
Read all about it in the shift e-log. </a> 


<!-- Comment: Thu Nov  6 09;11;07 comment by...muge -->
<pre>Hi, 
i forgot to mention yesterday that some of the older stuff that went on with wedge 7 *may* be found in the older elog pages..
i do not remember all the details except the preamp just near 
wedge 6.
but maybe elog becomes helpful?
it is great news though you are nearing  to finalize the search!
and thanks for the 2-d plot!</pre>


<!-- Date: Thu Nov 6 18:28:03 2003 -->
<pre>We spent a long time trying to track down the oscillation problem in the SW arch. After much searching, we found the cables that  
were (presumably) causing the problem. We have signal cables 7-04, 10-03, and 10-05 out and there are no oscillations now. We are going to leave them out overnight to verify whether the oscillation problem has gone away or not. 
 
We also removed two covers at the edge of wedge 7 that were dangling precariously. </pre>
<!-- Author: John Strologas, Ingyin Zaw -->

<!-- Date: Fri Nov 7 15:03:47 2003 -->
We found that some gas lines are kinked right behind the flow meters. There 
is a short 1/4" tube going out of the flow meter and then connecting to the 
1/2" lines we pulled out of the arch. The 1/4" tubes are kinked. There are 
at least two others which are kinked in addition to the two that aren't 
showing flow. It probably happened when the lines were pushed back up into 
the arch.

We ought to check the other arches as well, perhaps recruiting a pinhead 
with a long skinny neck.. (Insert your list here.)
<!-- Author: Phil -->
<!-- Comment: Fri Nov  7 15;06;12 comment by...ps -->
This relates to gas flow in the SW miniskirt (<a href=
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2003&action=view&page=931&frame=2&anchor=13:36:43.960'>link to main e-log entry</a>).


<!-- Date: Fri Nov 7 16:43:12 2003 -->
<pre>One of the 6v supplies for SW CMX preamps tripped causing an alarm. 6v shorted to ground when a Radeka was inserted. I reset all 4 LV supplies by unplugging, waiting and plugging them back in since I can't remember which supply is which. That reminds me that we all should take a tour and look at how our racks are wired up. A CMP rack will do.</pre>
<!-- Author: Phil -->


<!-- Date: Fri Nov 7 19:56:48 2003 -->
<pre>We placed new radekas on 10-02 and 10-03 since 10-03 was causing oscillation problems. As mentioned above, we tripped the LV while doing so but it's okay now. 10-05 is still out. We haven't put in new radekas for that stack. There are no oscillations anywhere.</pre>
<!-- Author: John Strologas, Ingyin Zaw -->
<!-- Comment: Sat Nov  8 12;55;03 comment by...muge -->
<pre>great! just a reminder, though: i remember Phil mentioning that the new radekas a
have smaller pulses and that the ms asd tresholds were lowered 
due to this reason... maybe it is a good idea to check these preamp's response and see if there is any inefficiency (which i think should not, but..)</pre>
<!-- Date: Sat Nov 8 06:23:52 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-214&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-214' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-215&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-215' width='300'></a></center>
<!-- Author: Dale Stentz -->
<!-- Comment: Sat Nov  8 06;25;02 comment by...Dale Stentz -->
<pre>via cosmic run (#173573).</pre>


<!-- Comment: Sun Nov  9 04;42;15 comment by...Ingyin Zaw, John Strologas, Dale Stentz -->
<pre>The two 4 channel sections in wedge 6 are due to the bad signal cables.  The plan is to wait until after the alignment (around Tuesday/Wednesday next week and put up the spare signal cables.  We note that these cables were orginally for the 10 degree section.  If memory serves us right these are infact the cables that should have been put for the last 8 channels on the SW miniskirt (aka SW 15-[00-05]).  Note that we had put the wrong set in for the last 2.5 degrees (8 channels) of the SW by putting in SW 15-[06-11].  Luckly this fact should cause no problems.  Obviousally, the SW miniskirt covers clear say where and which signal cables to use.  We will make some short of sign or note for the keystone as well which says as much.  

Wedge 10 has two extra deads from bad rakekas for the fixed 10-03 board and one entire set of 4 from a removed signal cable.  Note that after our work yesterday, the TDC outputs were all good for these channels.  In addition, we note that we saw no ocsilations.  

We should make it clear that the 16 channels from 10-[02-05] (therefore signal channels: 8-23) all have the modified radekas.     This is the ONLY place on the CMX arches to have these where as we have used modified radekas for all the miniskirts and for wedge 6.  

There are a couple of signal channel spots that show no occupancy.  Later today we will quickly look at these with any extra information via the cosmic run for run # 173640.  Otherwise things seem to be undercontrol for CMX.</pre>


<!-- Date: Sun Nov 9 06:01:41 2003 -->
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=934&frame=2&anchor=12:38:04.607'> 
See general summary at the shift elog. </a>  <br> 
<P> 
We can already see that all the channels (except ones which were known to be bad before) in west wedge 10 are now good (same for wedge 7).   
</P> 
<P> 
We are likly to look at the threshold value (for the ASD cards) for the keystone (wedge 6) which has the modified radekas as used in the miniskirts.  It seems logical to set this also to -1.0 V (so the real physical threshold is 100 mV). </P> 
<P> 
As for the ASD for wedge 10 (for which one-third of the channels have modified radekas) we think that it is best to hold off on any adjustment to the treshold.  We will certainly try to note the value when we make the adjustment for wedge 6. and go from there.  </P> 
<P> 
In retrospect, we see that if we had not removed all the 'old fashion' radekas from West 10-02 to 10-05 we may have save a lot of time but not having to put the new ones in everywhere.  It is easy to Saturday morning quarterback the desision we made but in reallity the potenial for a LV problem was never understood until   now.  However, its very possible that we could have removed the oscilation problem without the old style radekas by simply searching out the potential bad guys and relacing them with a differnt (non-modified) radeka.  Conversely, it is just as easy to say that the problem would have gone away for a bit until the oscillations came back after the SW arch was moved in or just after we got beam again.  </P> 
<P> 
Remaining major work: replace keystone signal cable, change the threshold on keystone ASD, final inspection of cables (etc.), and document some of the work goals for the next shutdown.  </P>
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->


<!-- Date: Sun Nov 9 08:17:17 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-219&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-219' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-220&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-220' width='300'></a></center>
<!-- Author: Dale Stentz -->


<!-- Date: Mon Nov 10 13:07:10 2003 -->
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=940&frame=2&anchor=12:59:12.357'> 
See the shift e-log for a summary of the quick access work we had today. </a> <br> 
<P> 
We changed the threshold value on the ASD for the working half of the keystone (wedge 6 ).  We set it to the same valud as the minskirts (-100 mV) from -140 mV.  [Recall the actual readout voltage is a factor of 10 larger.] 
</P> 
<P> We also made the gas lines for the SW miniskirt more free and unkinked.  Gas flow looks good and return = supply = .1. 
</P>
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->


<!-- Date: Tue Nov 11 09:31:21 2003 -->
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=941&frame=2&anchor=21:29:58.677'> 
CMX SW wedge 15 triped durning the evening shift yesterday. </a>  
<P> 
The cathode drew a large amount of current (~.8 mA @ 2.4 kV).  The anode appears to be fine.  Currently HV is holding everywhere and the current levles are I_anode = .2 microA and I_drift = .406 mA at normal/operating voltage.  No clue why it happened or why it seemed to go away after I ramped it up and down from off to stand-by. </P> 
  
<!-- Author: Ingyin Zaw, John Strologas, Dale Stentz -->
<!-- Comment: Tue Nov 11 10;37;33 comment by...Ingyin Zaw, John Strologas, Dale Stentz -->
<a href=
'/cgi/elog/elog.pl?nb=2003&action=view&page=943&frame=2&anchor=10:34:40.606'>
HV wedge 19 on the NE tripped around 9:30. </a> <P>
We brought the HV back up - everything seems fine now.  All of CMX holding. </P> 

<!-- Comment: Tue Nov 11 11;42;07 comment by...muge -->
<pre>HI, 
you seem to have repositioned the gas lines yesterday. I would 
think if an intermittent flow fault (of alchohol,..) occured for example, it *may* cause random glitches in current draws. What do you think? </pre>


<!-- Date: Tue Nov 11 15:33:48 2003 -->
<pre>We strung the spare cable for the keystone partially up the arch. 
We (with Dervin's help) will finish putting it in place tomorrow morning. 
 
Wedge 19 (HV wedge 20) on the NE tripped again. We will switch to 
the spare SHV cable. </pre>
<!-- Author: Phil Schlabach, Dale Stentz, Ingyin Zaw -->


<!-- Date: Wed Nov 12 11:14:52 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-221&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-221  width='300' align='top'></td><td>CMX 2d occupancy for run 173913 with 7325 events.  Looking into the hot spot in SE 15 (minskirt).</a></td></tr></table>
<!-- Author: Ingyin Zaw, Dale Stentz -->


<!-- Date: Wed Nov 12 12:40:51 2003 -->
Summary of CMX work: 
<P> 
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=946&frame=2&anchor=10:39:02.489'> 
See shift e-log for general actions. </a> 
</P> 
<P> 
We were successful in putting in the 6 replacement signal cables for the keystone.  For clairty we note that these cables replace CMX SW 06-xx where xx = {00, ..., 05}.  They have been replaced by CMX NE 20-zz where zz = {06, ..., 11}.  Note that we left a paper note on the keystone that said they were CMX SW 15-zz.  In fact, these signal cables are being used by CMP for the bottom.  On top of this, the CMP cables were ment to go to their intended spot for the SW miniskirt but we incorrently put in SW 15-xx.  In both the keystone and SW miniskirt case there is really no possiblity for confusion as there is only one way to hook up the 'unknown' guy. 
</P> 
<P> Back to the matter at hand, the replacement was nessary as two cables where bad.  They are still up there.  Of course we made sure (with the help of Dervin + Jamie) to put the signal cables through the steel 'eye' that hangs from the celing.  In this way there is enough slack so that the signal cables can expand when the SW arch moves out.  We checked the signals out via the TDC outputs.  We had the expected bad TDC channel on TDC = 17 for wedge 6 (west) which is due to the signal board (in some way) being bad.  The logical thing is to remove this board.  It should be board # 06-04.  Everyone else except the unpowered 06-11 is good.  Thus we recovered 7 (with the possiblity to recover another) channels. </P> 
<P> 
Because of the NE HV wedge 20 tripping we decided to switch the drift channel with the spare SHV cable.  Thus in place of CMX NE E Drift 07 we have 110887 CMX NE E -- CMX NE DRIF1. 
</P> 
<P> 
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=946&frame=2&anchor=09:28:31.407'> 
SE wedge 16 [iFIX wedge 15] </a>  We looked the SE miniskirt and it seems fine.  I re-arranged some cables in relation to the hot channel above.  The trip can be easily blamed on the humidy and heat in B0.  </P>
<!-- Author: Ingyin Zaw, Phil Schlabach, Dale Stentz -->
<!-- Comment: Wed Nov 12 12;47;25 comment by...Ingyin Zaw, Dale Stentz, Phil Schlabac -->
Correction: SW not SE tripped.


<!-- Date: Mon Nov 17 17:42:30 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-224&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-224  width='300' align='top'></td><td>Stand-by voltages are all over the place.  Let's set the standard to be:  V_anode = 2.5 kV V_drift = 2.0 kV   It seems that these values are in line with the majority of thoes above.  Should we go higher with both values (say 3.0 and 2.4 kV)?</a></td></tr></table>
<!-- Author: Dale Stentz -->
<!-- Comment: Mon Nov 17 22;09;59 comment by...Dale Stentz -->
<a href=
'/cgi/elog/elog.pl?nb=2003&action=view&page=962&frame=2&anchor=22:07:06.403'>
Done and done. </a> 
<P> All CMX stand-by HV values set to those outlined above.  </P>

<!-- Comment: Tue Nov 18 20;27;33 comment by...Phil -->
<pre>I think we should leave them at the lower values. It has no effect on the CDF turn on time. There is also some wierd behavior I recall seeing on the proton side during injection that look almost like there may be some ionization even at the lower values which we woul d like to minimize. (Or maybe it's just the pain killers talking.)</pre>


<!-- Comment: Wed Nov 19 16;15;55 comment by...Dale Stentz -->
<pre>I'll set the values to 1.5 and 1.0 kV.</pre>
<!-- Comment: Wed Nov 19 20;47;43 comment by...Dale -->
<pre>Stand-by HV values changed to V_anode = 1.5 kV and V_drift = 1.0 kV.</pre>
<!-- Date: Tue Nov 18 20:29:00 2003 -->
<table border=0><td><tr><td bgcolor=#e0e030><pre>If you all need to talk to me the next couple of days, you will find me at home or possibly at the Hahns.</pre></td></tr></td></table>
<!-- Author: Phil -->



<!-- Date: Wed Nov 19 16:17:20 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-225&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-225' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-226&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-226' width='300'></a></center>
<!-- Author: Dale Stentz -->
<!-- Comment: Wed Nov 19 16;19;37 comment by...Dale Stentz -->
<pre>Cosmic run (174427).  Note that the HV is at stand-by and that at various times through the run there was beam (proton) in the TeVatron.  More comments to come...</pre>



<!-- Date: Thu Nov 20 23:48:04 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-228&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-228  width='300' align='top'></td><td>They're back.</a></td></tr></table>
<!-- Author: Dale -->
<!-- Comment: Fri Nov 21 00;31;15 comment by...Dale Stentz -->
<pre>The problem goes away when wedges 7-8 are turned off.  So the problem is almost certainly in 8.  On the other hand 7 is not off the hook.  Prelim access plan - pull LV out to figure out for sure which wedge has the bad guy.  Then start pulling cables looking at the middle of the wedge first (pull out in sets of 4).  Once we find the bad signal cable we replace the old radikas with new style ones.  We may have to make a judgment call if one radika is so hard to remove [or really easy to remove SUPER DIFFICULT to put in] we may wish to save time by trying to force ossiclations quickly.  If they don't occur we write down the exact possition of the unmodified radika and leave it be.  Otherwise, we try to exchange old with new and if it takes to long to replace we leave it empty and lose a channel.  Very likly that we will have two 'bad' signal cables [i.e. where the occilations come from].  I'm playing around with the HV [note that the problem occurs at realtively low voltage], I don't suspect success only that I can stop problem at certain voltages.
</pre>

<!-- Comment: Fri Nov 21 00;47;53 comment by...Dale Stentz -->
<pre>I set the HV to 150 and 100 V for wedge 7-8.</pre>


<!-- Date: Fri Nov 21 16:12:16 2003 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-229&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-229  width='300' align='top'></td><td>Not sure what's going on here.  I figure it out by the end of my shift (hopefully).</a></td></tr></table>
<!-- Author: Dale Stentz -->


<!-- Date: Fri Nov 21 21:57:33 2003 -->
<a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=974&frame=2&anchor=21:28:04.863'> 
Problem spoted again. </a>  
<P> 
YMon in physics mode does not work but we plan to look at the scope to find if there is a 'center of evil'.  This sometimes helps.  An access will definately be needed. 
</P> 
  
<!-- Author: Dale Stentz -->
<!-- Comment: Sat Nov 22 00;48;28 comment by...Dale Stentz -->
<pre>Via the TDC outputs we did a quick sample of the 'how bad' the oscilation was.  There are only a couple of noisy guys in wedge 9.  Most of wedge 7 is also dead (i.e. two flat lines) but there are random areas of noise even around TDC=16.  All of 8 is noisy and it is much worse.  By worse we mean that the ECL crosses more as the 'baseline' [average position] moves into each other.  If we had to guess the problem is most likly in the middle or end of wedge 8 (this is were the noise is the worse).  The possiblity that wedge 7 may be the problem is a possiblity.  Recall that this is one of the places where we had the problem before the shutdown.  We suggest to pull the low volatage first for wedge 8 (or 7) and double check which wedge it is in.  For this reason we should think of having a person (or two!) in the counting room while two people play around with signal cables and LV lines down in b0.

We've set the HV to .5 kV on the anode and 1.0 kV [normal] on drift for stand-by.</pre>

<!-- Comment: Sat Nov 22 14;59;06 comment by...muge -->
<pre>Hi cmxers, about the cure for these wedges which is proposed to be replacing the preamps (i am assuming replacement is with the new redekas, otherwise irrelevant):
i am not too sure if we need to turn this into a habit, given 
that the signal response of the new radekas are told to be smaller. do we want to have these in random places of the detector, really? The problem might just as well be with a non-tighthened screw or an end cover. i agree that an access is definitely needed.(end-of-shutdown oscillations have long been a problem of cmxers, which gave them the fame to be always one of the lastest to come out of the pit). At this point i can not be of much help, without seeing anything, but just wanted to make a comment. let me know if you need help.</pre>

<!-- Comment: Mon Nov 24 11;57;09 comment by...Phil Schlabach -->
<pre>HV was on and the problem was gone as of 0800h, Monday am.</pre>

<!-- Comment: Mon Nov 24 17;10;46 comment by...Dale Stentz -->
<pre>Fundmentally Muge is right on putting in the new radikas.  If we have lot of time or have a 'smoking gun' for what might be causing the osscilations (grounding exposed or other reasons sighted above)  we should fix it right and proper.  The other side of the coin is that if we have only short accesses and the problem reoccurs then it seems that putting in the new radikas might be the end all solution.  Somewhat of a catch-22.  In any case, I never have been able to point my finger at the obvious problem.  What makes matters even more confusing is that the system is know work fine with full HV.  See plots below.</pre>


<!-- Date: Mon Nov 24 17:12:03 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-230&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-230' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-231&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-231' width='300'></a></center>
<!-- Author: Dale -->
<!-- Comment: Mon Nov 24 17;18;58 comment by...Dale Stentz -->
<pre>From run # 174769 [the ~2nd run of the store that day].  The same thing is seen in run #174778.  I'll look at all the others from last night and confirm my thoughts.

The CO (the run just started at the end of his shift) thought that the Event Display showed that 'everything' was noisy.  This was said in the summary at the end of the shift.  I'll talk to the CO for the next shift (where most of the running happened) and ask him what he saw.  More to come...

</pre>

<!-- Comment: Mon Nov 24 19;28;14 comment by...Dale -->
No signs of occilations during the other runs.


<!-- Date: Mon Nov 24 23:58:55 2003 -->
<P> 
We made a controled access this night and attempted to find the 'bad' signal cables.  We found it at wedge 8 cable 9.  This cable has been left out until a supervised accessed and its been deturmined that no other ossilations come up.  <a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=983&frame=2&anchor=23:51:07.940'> 
See shift elog for summary of work. </a>  
</P>  
<!-- Author: Dale Stentz -->
<!-- Comment: Tue Nov 25 08;01;15 comment by...Dale Stentz -->
<pre>During the night there was lots of quiet time - the muon systems were turned on and there were several runs - all show no osscilations.</pre>

<!-- Comment: Tue Nov 25 10;45;13 comment by...Phil Schlabach -->
What I saw during the access is that the oscillations only occur with voltage at standby. Dale confirmed that this seems to have been true in general of this latest outbreak. The data was all good, only the runs with voltage at standby were bad.


<!-- Date: Fri Dec 5 21:02:23 2003 -->
<p> 
A 'double' trip noticed durning quite time on <a href= 
'/cgi/elog/elog.pl?nb=2003&action=view&page=1016&frame=2&anchor=19:53:40.658'> 
Friday. </a> We brought back up the HV without trouble.  Seems to be fine.  Told the shift crews to put it at stand-by if it trips twice in a row and then to bring it back up ~5 min later. 
</P>
<!-- Author: Dale Stentz -->


<!-- Date: Mon Dec 8 08:21:15 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-232&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-232' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-233&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-233' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-234&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-234' width='300'></a></center>
<!-- Author: Dale Stentz -->
<!-- Comment: Mon Dec  8 08;31;46 comment by...Dale -->
<pre>The Big 3 CMX plots via a cosmic run.  Run (#175854) was about 5 hour long - run #175864 was almost as long and looks the same.  

Notice multiplicity and Ave width are back!

Overall no big problems.  A couple of hot spots (we'll check that these are the 'known' guys).  General check out to make sure nothing changed.  Note the 4 chamber gap in wedge 8 is the removed cable.  For now we will put these in as the 'refrence' plots for the CO in the cosmic binder.  (We have already updated the 'physics' plots.)</pre>


<!-- Date: Wed Dec 17 00:34:41 2003 -->
<pre>Andrei L. resolved two CMX related issues in evd upon my 
 request. these are the incorrect wedge configuration in  
the r-phi COT display and the missing CMX hits in the 3D  
CDF display. the corrections should take effect in version  
5.3.0. thanks, Andrei!</pre>
<!-- Author: muge -->


<!-- Date: Fri Dec 19 23:38:58 2003 -->
<pre>To Phil: your mail server quota is full. emails sent to you bounce back!</pre>
<!-- Author: muge -->


<!-- Date: Thu Dec 25 01:33:29 2003 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-235&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-235' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-236&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-236' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-237&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-237' width='300'></a></center>
<!-- Author: Dale -->
<!-- Comment: Thu Dec 25 01;37;29 comment by...Dale -->
The big 3 YMon CMX plots
<p>
A cosmic run [176951] about 16 hours long.  Would have been longer but the ace had to remove the EM timing crate.  This will be put in as the 'cosmics' refrence plots.
</p>


<!-- Date: Thu Jan 8 18:28:27 2004 -->
CMX dx problem. east z distribution also looks funny to me. 
calibration? alcohol temp? east miniskirts?what else? needs to be checked, i think.. 
<a href= 
'http://www-cdfonline.fnal.gov/cgi/elog/elog.pl?nb=2004&action=view&page=24&frame=2&anchor=17:13:40.161'>details here</a>
<!-- Author: muge -->
<!-- Comment: Thu Jan  8 22;08;02 comment by...muge -->
<pre>Phil's explanation makes sense to me. somehow more high pt (or less low pt) guys are around!!</pre>


<!-- Date: Tue Mar 16 12:07:54 2004 -->
<pre>The e-log files for the period February 12, 2004 to March 9, 2004 were lost when the CDF server went down and the 
back-up for the files failed. It is not obvious that we lost anything.</pre>
<!-- Author: ps -->


<!-- Date: Tue Mar 16 12:22:27 2004 -->
<center><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-238&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-238' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-239&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-239' width='300'></a><a href='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-241&button=yes' target='xxx' onclick='jswindow()'><img src='/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=-241' width='300'></a></center>
<!-- Author: ps -->
<!-- Comment: Tue Mar 16 12;24;21 comment by...ps -->
<pre>analysis trips in CMX since the first of the year</pre>

<!-- Comment: Tue Apr 20 14;22;06 comment by...Phil -->
The last plot is wrong. I had some channel assignments messed up. The corrected plot can be found <a href=
'http://www-cdfonline.fnal.gov/cgi/elog/det-system-elog.pl?nb=cmx&action=view&page=6&frame=2&anchor=14:20:26'>here</a>.