Log entry time 07:05:15 on March 13, 2012

Entry number 366179

This entry is a followup to: 366154

Followups:

• 366251 03/13/12 21:53 A. Camsonne Scaler BCM rough calibration right arm
• 366252 03/13/12 21:54 A. Camsonne Scaler BCM rough calibration right arm

I adjusted the coefficient so that BCM and MPS readout match at 200 nA,
this give a factor of 3.81 so I think values on 1H00 were about 4 times
smaller since I increased the gain.
From the calorimeter run I estimated charge sent to be 

Delta T / Heat capacity / beam energy

root [8] 8.313/8568.6/2253
(const double)4.30612585952742999e-07
so 0.43 uC

and this gave for 25.43 minutes an average current of 28.2 nA which is
pretty close to the 25 nA requested, I will put the exact constant when
the OPS EPICS screen gets updated since it should display
(IBC1H00MAGA+IBC1H00MAGB)/2 but displays now
CALC\{((A+B)/120)}(IBC1H00MAGA,IBC1H00MAGB)

I updated the constant of the BCM screen using this 28 nA :

root [0] 0.028/(1345-153.1)
(const double)2.34919036831948975e-05
root [1] 0.028/(1655-172)
(const double)1.88806473364801066e-05

Old : IBC1H00CURA.C                  4.50424e-06 
New : IBC1H00CURA.C                  2.34919e-05 
[adaq@adaql7 ~]$ caput IBC1H00CURB.C 1.88806473364801066e-05

..................................................................
Old : IBC1H00CURB.C                  3.73413e-06 
New : IBC1H00CURB.C                  1.88806e-05 

so now IBC1H00BCMAVG is pretty consistant with the MCC value.

I will get a more accurate calibration with a few additionnal calorimeter
points, that would be nice to crosscheck with Faraday Cup when Hall B and
Hall C have a downtime.

Pengjia will do the analysis for the scalers from the calorimeter run.