From novaes@fnal.gov Mon Sep 23 16:41:28 2002
Date: Mon, 23 Sep 2002 16:36:57 -0500
From: Sergio F. Novaes <novaes@fnal.gov>
To: novaes@fnal.gov
Subject: FPD News 20/Sep/02

Helio da Motta Filho
Monday, September 02, 2002
switches

I am following the specifications of the micro switches in
case we need spares.

Manufacturer:HSI - Haydon Switch & Instrument, Inc
Model: 6130
__________________________________________________________________________

Jorge Luis Barreto
Tuesday, September 03, 2002
Meeting Summary

        Today at 3pm, W. Prado, C. Martins, V. Bodyagin, C. Avila,
M. Strang, S. Novaes and J. Barreto met at Salle des Heros to discuss
the dipole elastic data sample and its tracking, for Runs 342-347.

        The Data sample contains 760 evts (out of ~140K raw events), and
pots locations are estimated to be at D1=11.89mm (~15Sig) and D2=11.57mm
(~16Sig), respectively. All plots presented during the meeting can be
found (set0302.tar.gz file) at

                www-clued0.fnal.gov/~barreto/fpd/data_analysis/

        Data have been reconstructed using the standard procedure in the
tracking code and results can be found in the plots:

1) D1_hits.ps ---> Hit distributions at D1 location;
2) D2_hits.ps ---> Hit distributions at D2 location;
3) dip_x_cor.ps --> X correlations
4) dip_y_cor.ps --> Y correlations
5) xi_dip_reco.ps --> reconstructed xi_distribution;
6) t_dip_reco.ps  --> reconstructed t_distribution;
7) xi_dip_halo_reco.ps --> ibid, for the halo sample;
8) t_dip_halo_reco.ps ---> ibid.

        From these plots, it seems there is real good correlations at
both dipoles pots, and hit distributions seem quite right, containing
high reconstructed x_values, which could be associate with high t events,
since trigger was D1.D2.P1O. However, MC results shows that for elastic
and at these pot locations, shouldn't exist any elastic events, since
high_t elastic trajectories hit the beam pipe somewhere inside quadrupoles
and separators (see dip_xy.ps file), without reaching the dipole
locations. Although MC was done with no smearing in the Z-vertex, its
results is not expected to change by a large x amount when including the
smearing on it.

        After some discussion, we came up with two different conclusions
about these results:

1) Pots are much closer to the beam than we think it is;

2) Data contain basically halo hits and the trigger veto is not doing
its job correctly. One possibility to consider, in this case, is the fact
that the beam profile is vertical at the P_side and horizontal at
Pbar_side. For the p_side, halo particle should be much more extended in
the vertical plane than in the horizontal one. The opposite happens in the
pbar side. Since we are vetoing early hits with P1O (horizontal side),
much of the vertical halo particles are not vetoed in the
(horizontal) pbar side. However, such explanation only holds if the beam
indeed rotates physically of 90 degrees by going from the p_side to the
pbar_side. If it only gets squeezed, not rotated, then the actual trigger
set should work. Maybe Mike Martens can clarify this point further.

        Any other idea in this issue will be welcome.
__________________________________________________________________________

Mike Martens
helium in tunnel

I have gotten more information on the He in the Tev tunnel. There are
known leaks in the Tevatron cryo system. Mostly this is due to leaks in
the ceramic feedthroughs in the corrector spool pieces of which there
are hundreds. The spool pieces are being retrofitted to eliminate/reduce
the leaks, but this is a long term project that won't be finished for
years.

There are fans to circulate the air in the Tevatron tunnel at about 3 to
4 mph. Of course, this doesn't help the He situation since air is only
pushed around. There is no system to exchange tunnel air with the
outside air so it is not likely that we can reduce the He levels in the
tunnel in any convenient manner in the short term.

I am not sure what options we have. If it is really a problem we would
have to figure out a way to isolate the area around our detectors and
circulate fresh air into that volume. I don't know how difficult this
would be, but my guess is that it would have to happen during a
significantly long
shutdown.___________________________________________________________________
_______

Michael Strang
Tuesday, September 17, 2002
Pot Position webpage

I've created a new interactive webpage that calculates sigma's from beam
for pot positions as well as using the most restrictive sigma from groups
of pots moved in to calculate which positions all pots in the group should
be
moved to in order for them to all be at the same sigma.

The page can be found at:

http://d0server1.fnal.gov/users/strang/web/fpd/documents/potpos.html

The first section is for input:

I've defaulted the emittances to 20 and used the latest values I have
for beam displacement. These values can be changed if needed to reflect
actual beam conditions. I've hardcoded the beta values, beam energy and home
to
beam pipe center values from the latest information I have.

The important part to update is the pot positions in mm from home. Type
in the values for all pots that have been moved in their final positions.
Then click
on the Calculate button.

The bottom of the page will now show the following:

Sigma from beam for all pots that have been moved. A 0 means the pot
wasn't moved.

Distance of pot from the beam in mm.

Finally, separately for dipoles, horizontal pots and vertical pots, it
will scan the moved pots and find the largest sigma value then calculate
where all
other pots in the group should be moved so that they are at this same sigma.

Please look at the page and send me any comments.
__________________________________________________________________________

Sergio F. Novaes
Wednesday, September 18, 2002
Some FPD page locations have changed
,

    Several of our FPD links have changed. This will allow a more flexible
update. They are being automatically redirected to the new locations. Please
update your bookmarks.

    The news locations are:

Proton ID Meeting: http://www-d0.fnal.gov/fpd/Pages/pid.html

Physics Tasks and Software Update:
http://www-d0.fnal.gov/fpd/Pages/tasks.htm

Training Due Dates: http://www-d0.fnal.gov/fpd/Pages/training.htm

Schedule for 2002 at Fermilab: http://www-d0.fnal.gov/fpd/Pages/schedule.htm

Videoconference: http://www-d0.fnal.gov/fpd/Pages/videoconference.htm

FPD Logbook - Quick Reference Manual: Logbook instructions:
http://www-d0.fnal.gov/fpd/Pages/logbook.html

 __________________________________________________________________________

Vladimir Sirotenko
Thursday, September 19, 2002
RM configuration summary

Please find below brief summary of FPD RM current configuration.

The document can be found at:

http://www-d0.fnal.gov/fpd/Links/Files/mux_python.html

and at

http://d0server1.fnal.gov/users/strang/web/fpd/documents/mux_python.html


                  FPD RM Configuration
                  ====================

This is a brief summary of current RM configuration after MUX installation

There are 5 RM in the tunnel, one for each castle.

EPICS names from FPD RM are the following:

P1: FPD_RM_02-11
P2: FPD_RM_02-13
A1: FPD_RM_02-01
A2: FPD_RM_02-03
D : FPD_RM_02-05

Digital ports configuration:

P2 ( bin05, 1 port )                  output
P7 ( bin06^bin13, 8 mux ports )       input
P3 ( bin00, 1 port )
        input
P8 ( bin01^bin04, 4 mux ports )        output

where bin** - fields of RM EPICS record

Piano switches on the RM front panel must be set as  -_  _--_

Digital ports details (lower bit is 0) :

P2 (bin05) :  Software Control Command

     bit 4: smoke reset, =1 all the time, =0 when reset
     bit 5: control of driver power box, =1 on, =1 off
     bit 6: control of amplifier board power box, =1 on, =1 off
     bit 7: software emergency line (not implemented)
     bit 8: not used

P8 (bin01^bin04) : Pot Motion Command, 16 bit word

     bin01 - control of UP pot
     bin02 - control of DOWN pot
     bin03 - control of IN pot
     bin04 - control of OUT pot

P3 (bin00)  :  Software Control Status

     bit 0: smoke signal, =1 no smoke, =0 smoke
     bit 1: driver power box status, =1 on, =1 off
     bit 2: amplifier board power box status, =1 on, =1 off
     bit 3: control line status, =1 enabled, =0 disabled
     bit 4: emergency line status, =1 emergency, =0 no emergency
     bit 5: readout of what is written in bit 5 of P2
     bit 6: readout of what is written in bit 6 of P2
     bit 7: readout of what is written in bit 7 of P2
     bit 8: readout of what is written in bit 8 of P2
     bit 9 ^ bit 11: low bits of RMI geographical address (not
implemented)

P7 (bin06^bin13) :  Pot Motion Status

     bin06 ^ readout of what is written in P8, bin01
     bin07 - readout of what is written in P8, bin02
     bin08 - readout of what is written in P8, bin03
     bin09 - readout of what is written in P8, bin04
     bin10 ^ status of UP pot, 8 bits

                  bit 0: cable status bit, =0 ok, =1 failure
                  bit 1: home bit, =0 not home, =1 home
                  bit 2: in bit, =1 in, =0 out
                  bit 3: motion bit, =0 stop, =1 motion
                  bit 4: mechanical status, =0 ok, =1 failure
                  bit 5: driver status, =1 ok, =1 failure
                  bit 6: direction, =1 in, =0 out
     bin11 ^ status of DOWN pot, 8 bits
     bin12 ^ status of IN pot, 8 bits
     bin13 ^ status of OUT pot, 8 bits

Analog ports configuration:

AD32 :  raw LVDT from UP pot
AD33 :  raw LVDT from DOWN pot
AD34 :  raw LVDT from IN pot
AD35 :  raw LVDT from OUT pot

where AD** - fields in FPD_RM_02-xx RM record
__________________________________________________________________________

Stefan Gruenendahl
Monday, September 23, 2002
FPD channels: VRB location

The web location of the current VRB channel spreadsheet is

http://d0server1.fnal.gov/projects/triggerelectronics/locations%26cables/cab
le_spreadseets/vrb_channels_afe8_20020823.xls

The SVX (Sequencer) data are in VRB crate x52, slot x13;
SVX info: sheet '52 M213-1'
The trigger data are in VRB crate x13, slot C, 'channel' (fiber, really) 2
and 3 , i.e. the last two fibers.
Trigger info: sheet' Trig Optical Cable Source'.

The date in the file name might change, in which case the web browser access
doesn't really help

__________________________________________________________________________

 Sergio F. Novaes                                                Fermilab
 E-mail: novaes@fnal.gov                                     P.O. Box 500
 Phone: (630) 840.2454                                   Mail Station 352
 Cell:   (630) 272.1819                            Batavia, IL 60510-0500
 Fax:   (630) 840.8886                                                USA
__________________________________________________________________________