User name X. Zheng
Log entry time 17:44:52 on August16,2001
Entry number 70819
This entry is a followup to: 70712
Followups:
keyword=Gas Cherenkov Calibration for E99117/E97103Gas Cherenkov Calibration for E99117/E97103
Attached are two plots showing position of single ph.e. peak for left and right
arm gas cherenkov detectors. Single ph.e. peaks are aligned to channel 150.
Left arm #9 PMT looks good.
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ChangeLog
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* Aug-16, X. Zheng
re-calibrate by E97103-2837 and 21837,
checked by E97103-2833 and 21833;
right gc change gain to:
2.241E+00 2.378E+00 2.624E+00 2.181E+00 2.253E+00 2.425E+00 2.732E+00 2.103E+00
1.893E+00 2.699E+00
left gc change gain to:
5.219E-01 8.426E-01 6.745E-01 6.081E-01 8.908E-01 7.831E-01 5.387E-01 7.853E-01
7.985E-01 6.459E-01
old db_e97103 saved as db_e97103.gc.aug15
note: this fix the drifting (or mis-calibration) of right PMT#7;
left gc PMT#9 (new) is pretty good.
* Aug 13, Left GC PMT #9 replaced, see halog entry #70712
* June 03 ~ Aug-16, X.Zheng
right gc:
5.22E+02 4.53E+02 3.15E+02 3.32E+02 4.53E+02 5.63E+02 4.49E+02 4.69E+02
4.93E+02 5.59E+02
2.401E+00 2.463E+00 2.801E+00 2.275E+00 2.366E+00 2.345E+00 3.288E+00 2.053E+00
1.898E+00 2.702E+00
left gc:
3.01E+02 3.41E+02 3.19E+02 2.75E+02 3.56E+02 3.06E+02 3.60E+02 3.48E+02
3.63E+02 3.27E+02
5.005E-01 7.699E-01 7.022E-01 6.632E-01 8.968E-01 8.143E-01 5.758E-01 6.774E-01
6.158E-01 6.390E-01
originally calibrated from E99117-1340 and E99117-20340
checked by E97103-2486 and E97103-21486
note: left gc PMT#9 noisy, starting E99117-194x;
right gc PMT#7 drifting (single ph.e. peak from channel 150 to 200),
frequently during E99117; But it was good for E97103-21486.
FIGURE 1
FIGURE 2
