<!-- Title: 09:44:44  Tue Mar 12 2002 -->
<!-- Crewchief: Thomas Phillips -->
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<pre>Shielding test with small counters</pre>


<!-- Date: Tue Mar 12 09:46:48 2002 -->
<pre>Here is the configuration of small counters(6"x6" for counters 10-18  
or 6"x10" for counters 1-8) that were installed in the collision hall on March 7th: 
In the alcove:  
WALL 1: counter 1 is next to the wall 42-52" from the quad 
WALL 2: counter 5 is 12" towards B0 from WALL 1 
ALCOVE 1: counter 6 is 69" from the wall, 39-49" from the quad, 24-32"  
above the floor (shielded from upstream by steel).  I think this is higher  
than the wall counters, which are on a concrete block. 
ALCOVE 2: 70" from wall, adjacent to ALCOVE 1 
 
STANDS 1-4 and HOLE 1&2 as shown (the diamond is 12" (30cm) of steel bricks): 
 
           Q3 
__________________________________________ 
 
        ------ S2 
        ------ S1 
  
          /\ 
         /  \ 
        /    \ 
       /      \ 
      /        \ 
     /    /\    \ 
    /    /  \    \ 
   /    /    \    \    | 
  /    /------\H1  \   | 
  \    \------/H2  /   | S3 
   \    \    /    /    | 
    \    \  /    / 
     \    \/    / 
      \        / 
       \      / 
        \    / 
         \  / 
          \/ 
        ------ S4 
 
Counters H1 and H2 are about 36" from the beam and 102" from ALCOVE 1&2, so  
they are 172-178" from the wall.  I do not know which of H1 or H2 is  
closest to the beam.  The exact distances for S1-S4 were not measured.  
 
Here are the channel and cable assignments: 
 
Location Counter HV Pit HV  Patch HV   COW  Signal Patch  Upstairs 
                    Cable    HV  Cable      Cable  Signal Sig Cable 
WALL 1    1    1800v  34      7    49   14     21    7      39 
WALL 2    5    2100v  30     10    52 separate 27   10      42 
ALCOVE 1  6    2100v  36     10    52 supply   23   20      44 
ALCOVE 2  8    2100v  37    none               28   21      45 
STAND 1  18    1460v  31      8    50   15     22    8      40 
STAND 2  17    1500v  35     11    53   18     29   11      43 
STAND 3  13    1400v  33      9    51   16     26    9      41 
STAND 4  15    1660v  32      4    48   13     20    4      38 
HOLE 1   14    1460v  un-     8    50   15     24   22      46 
Hole 2   16    1460v labelled 8    50   15     25   23      47 
</pre>
<!-- Author: T. Phillips -->


<!-- Date: Tue Mar 12 10:27:57 2002 -->
Here are the scalar counts as recorded in the elog book for when the  
shielding was in place.  The scalar assignments are as follows: 
 
<PRE> 
Stand 1   Stand 2   S12 coincidence 
Stand 3   Stand 4   S124 coincidence 
Wall 1    Wall 2    W12 coincicence 
Alcove 1  W12A1 co  W12A1S3 coinc. 
Hole 1    Hole 2    H12 coincidence 
 
S1234   WS12   HS12   Alcove 2 
S34     ---    HS34   --- 
 
Notes:  
S1234 are not in a line, so it counts splashes 
</PRE> 
Alcove 2 has no HV, so it counts noise which should probably be subtracted from  
coincidences (these all count even with no beam) 
<P> 
W12A1S3 should all be in a line, but this has not been timed in.  The line  
was not surveyed, and these counters are small... 
 
<P> 
<A href=/cgi/elog/elog.pl?nb=2002&action=copyentry&page=205&time=07:50:38> 
Sun Mar 10 07:50:38  </A> 
 
<PRE> 
1st measurement:  
572112   478752   216216  
279539   172219     9964  
113988   257427    40930  
338275     1301       15  
109981    99386    57711  
 
 1764  1777  3760  21  
17913     0   514   0  
 
2ns measurement:  
577874   484510   219456  
282610   173969    10351  
115085   259088    41506  
342456     1294       10  
111078   100042    58142  
 
 1867  1762  3781  28  
18135     0   535   0  
</PRE> 
<P> 
<A href= /cgi/elog/elog.pl?nb=2002&action=copyentry&page=206&time=13:00:03> 
 Sun Mar 10 13:00:03  </A> 
<PRE> 
 2190186   1848701    846019  
  961597    648104     40132  
  444920   1028605    155401  
 1226446      4338        63  
  394300    356613    205153  
 
    6626      6039     13834        97  
   60219         0      1686         0  
</PRE> 
 
<P> 
<A href=/cgi/elog/elog.pl?nb=2002&action=copyentry&page=207&time=16:28:26> 
Sun Mar 10 16:28:26 </A> 
<PRE> 
Rates from Jeff's scalars:  
 
Inst. Lum. = 3.0E30  
B0PLOS = 8.0kHz and B0ALOS = 0.57kHz  
 
 2109729   1788629    827923  
  875114    619484     40249  
  425641    986260    144140  
 1126390      4016        52  
  365013    330064    189012  
 
    6479      5341     13203       114  
   54162         0      1488         0 
</PRE> 
 
<P> 
<A href=/cgi/elog/elog.pl?nb=2002&action=copyentry&page=208&time=01:39:13> 
Mon Mar 11 01:39:13 </A> 
<PRE> 
388845  317565  143046  
207232  118177    6756  
 73315  161465   27084  
243413     991       9  
 80434   72993   42847  
 
 1374  1347  2765  11  
14126     0   441   0  
 
at Lum=9.7E30, LOSTP=17K, LOSTPB=5.3K 
</PRE> 
 
<P> 
<A href=/cgi/elog/elog.pl?nb=2002&action=copyentry&page=208&time=06:02:38> 
Mon Mar 11 06:02:38 </A> 
<PRE> 
308322  253825  114756  
147502   91382    5279  
 61055  135755   21674  
181014     663       7  
 59462   54117   31487  
 
 927  894  1949  11  
9345    0   282   0  
 
at Lum=5.5E30, LOSTP=17K, LOSTPB=2.5K 
</PRE>
<!-- Author: T. Phillips -->