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User name miham
Log entry time 08:03:45 on April29,2009
Entry number 269676
keyword=Owl Shift Summary (04/29/09)
Owl shift summary: Miha Mihovilovic (SL), Peter Bradshaw (TO)
Eli Piasetzky (3rd)
===================================================================
EVENTS
------
00:00 Right before midnight the problem with some ADCs in the
neuton detector was discovered. We asked for controlled
access and went down the hall (Brad, Eli, Miha and Bryan
on the phone) in order to fix it. Unfortunately we weren't
able to resolve this problem. We have decided to leave the
hall and run the experiment on as it is and try to resolve
the problem in the morning.
01:25 Went out of the hall and asked for beam permit.
01:26 Went to power permit
01:36 Went to beam permit. Asked for beam with empty target
01:53 Moved to the carbon optics target.
01:55 Asked for 5uA beam, raster off. We also asked MCC to do a
HARP scan with beam profile 100-300um.
01:58 MCC gave us beam with raster on. Called back and asked for
non-rastered beam.
01:59 We have 5uA non-rastered beam - checked on the scope, Now
waiting for the HARP scan.
02:10 MCC called and gave us the following numbers A: 36.7 x 281.5
and B: 154.3 x 299.1. Since the result for A was not good, I
asked MCC to correct the profile and call us back.
02:23 MCC called again. They have adjusted the beam a bit and the
new HARP scan values are: A 135
02:25 Asked for 5uA rastered beam 4x4mm (8x5 MCC)
02:40 Tried to do a Spot++ check, but wasn't able to do it,
because run numbers of the data files were not incrementing.
The coda showed that the current run number is #1646 while
the "dead time" deamon was stuck at #1640. We have restarted
the HRS-L coda and the run number jumped back to the #1640.
I have checked the data directories where the raw data files
are stored and realized that the file e05102_1640.dat.0
appears in all four directories. Called Brad and asked him
for help. He solved this problem.
03:00 Similar problem appeared with the HRS-R coda.The run
number shown in coda window was #20528 while the
HRS-R daemon was trying to write into file #20525.
Restarted coda few times but it didn't help. We
again called Brad for help. We had to reboot the
right arm TS0. After that things started to work.
03:13 Made first Spot++. The spot size is 4x4mm. Looks ok.
03:15 Move target form optics to He3.
03:19 Asked for 2uA beam with raster 2x2mm (4x2.5 MCC units)
T3 rate is 7.61 kHz
03:25 Asked for 2uA beam with raster 6x6mm (12x7.5 MCC units)
T3 rate is 7.9 KHz. Since difference between these two
measurements was smaller than 10% we have decided to
to go Production running
03:30 Asked for 6uA beam with 4x4mm raster (8x5MCC units).
Adjusted the prescales (LPS3 =7 , LPS4 = 15, RPS1 = 7
and RPS2 = 40), so that the real trigger rates are
correct.
03:40 Started production running #1647 and #20533. Dead time
was LDT = 3% and RDT = 1%.
04:07 After runs #1647 and #20533 ended, we waited a while so that
Yawei was able to change the high voltages for the Lumi.
04:32 Yawei increased the hight voltages for lumi and we
proceeeded with production data taking.
04:40 HV for the LUMI has been changed back to their original
values during runs #1648 and #20534. Therefore we have
decide to stop these two runs and start a new "fresh" run.
04:45 Contacted Brad and told himn about the lumi problem. He
suggested that we keep runing with out changing the lumi HV.
06:18 Started new Happex run #31288
07:00 Turned off the ND HV.
RUNS
----
LEFT HRS:
==========================
Runs #1640 - #1543 Junk!!!
Runs #1644 - #1646 Spot++ checks
03:39-04:07 #1647 3He produnction run, Num. ev = 5M, I = 6uA
04:31-04:40 #1648 3He produnction run, Num. ev=1.6M, I = 6uA
(We ended the run lumi HV change )
04:47-05:19 #1649 3He produnction run, Num. ev = 5M, I = 6uA
05:19-05:49 #1650 3He produnction run, Num. ev = 5M, I = 6uA
05:49-06:17 #1651 3He produnction run, Num. ev = 5M, I = 6uA
06:19-06:54 #1652 3He produnction run, Num. ev = 5M, I = 6uA
07:03-07:43 #1653 3He produnction run, Num. ev = 5M, I = 6uA
RIGHT HRS:
==========================
Runs #20525 - #20529 Most probably JUNK!!!
Runs #20530 - #20532 Spot++ checks
03:39-04:07 #20533 3He produnction run,Num.ev=4.03M, I = 6uA
04:31-04:40 #20534 3He produnction run,Num.ev=1.30M, I = 6uA
(We ended the run lumi HV change )
04:47-05:19 #20535 3He produnction run,Num.ev=4.09M, I = 6uA
05:18-05:49 #20536 3He produnction run,Num.ev=4.09M, I = 6uA
05:49-06:17 #20537 3He produnction run,Num.ev=4.09M, I = 6uA
06:18-06:55 #20538 3He produnction run,Num.ev=4.09M, I = 6uA
07:02-07:43 #20539 3He produnction run,Num.ev=4.03M, I = 6uA