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    User name Kalyan

    Log entry time 19:58:54 on October 26, 2008

    Entry number 244783

    keyword=Discrepancies between L_HRS and BigBite scalers

    Xin pointed out that there are some differences between L_HRS and BigBite scaler counts for triggers T2, T6, and T7. It looks like L_HRS scaler channels for the above mentioned trigger are counting twice when compared with BigBite, for all the gated scalers(see below). Ungated ones are fine.

    T2, T6, and T7 should all count the same, since the HV on BigBite is turned off and they all are triggering on edtm pulser. From the summary below, it is indeed the case for the "bbite" scalers but not for the "left".

    Note : On left arm, for T7, (+-) and (--) counts match with bbite whereas (++) counts twice and (-+) is completely different from bbite.

    I will check them tomorrow when the hall opens and see whats is causing this double counts on these triggers. 

     -------------   Scaler Summary   ---------------- 
Scaler bank  bbite
clock location 4  7
clock counts 491050   clock rate 1024
Time of run     7.99 min 
Triggers:     1 = 5995    2 = 5995    3 = 1071927   4 = 30909    5 = 5989
Accepted triggers:   168600 
Accepted triggers by target and helicity state: 
  (++) = 35239    (+-) = 34884   (-+) = 42042    (--) = 41923 
Trigger 1,2,3,4,5,6,7,8 by target and helicity state :
       (++)    (+-)    (-+)    (--)  
trig 1   1341   1375   1291   1342
trig 2   1341   1375   1291   1342
trig 3   232989   233047   245625   245668
trig 4   6711   6741   7091   7032
trig 5   1339   1374   1291   1341
trig 6   1341   1375   1291   1342
trig 7   1341   1375   1291   1342
trig 8   110929   110905   107869   107975
Charge Monitors  (Micro Coulombs)
Upstream BCM   gain x1  3392.96     x3  3340.45     x10    -1.42
Downstream BCM   gain x1  3496.13     x3  3477.34     x10  3477.34
[adaq@adaql4 scaler]$ ./tscalntup /adaql2/data3/e06010_2180.dat.0 Left 
Bank = Left
Opened scaler map file scaler.map

    
Bdate :  day = 26  month = 8   year = 2008
Using Left Arm BCM pedestals
Normal end of file /adaql2/data3/e06010_2180.dat.0 encountered

    
 -------------   Scaler Summary   ---------------- 
Scaler bank  Left
clock location 1  7
clock counts 480074   clock rate 1024
Time of run     7.81 min 
Triggers:     1 = 5861    2 = 5861    3 = 1056147   4 = 30174    5 = 5856
Accepted triggers:   168853 
Accepted triggers by target and helicity state: 
  (++) = 35297    (+-) = 34933   (-+) = 42104    (--) = 41987 
Trigger 1,2,3,4,5,6,7,8 by target and helicity state :
        (++)   (+-)   (-+)   (--)  
trig 1   1341   1375   1292   1342
trig 2   2682   2748   2582   2683
trig 3   235325   235454   248110   248067
trig 4   6715   6741   7098   7031
trig 5   1339   1374   1291   1341
trig 6   2682   2749   2582   2683
trig 7   2683   1375   2079   1342
trig 8   110928   110905   107867   107961
Charge Monitors  (Micro Coulombs)
Upstream BCM   gain x1  3308.58     x3  3257.20     x10    -1.38
Downstream BCM   gain x1  3408.95     x3  3390.56     x10  3390.55



    A copy of this log entry has been emailed to: rom@jlab.org