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User name miham
Log entry time 08:05:26 on April28,2009
Entry number 269393
keyword=Owl shift summary (04/28/09)
Owl shift summary: Miha Mihovilovic (SL), Peter Bradshaw (TO)
Eli Piasetzky (3rd)
===================================================================
EVENTS
------
00:00 Start of the OWL shift. We are in "production" mode
and are taking 3He data (Vertical polarization. The target
polarization is 85.4%) The shift starterd during runs #1601
and #20472.
00:30 The instructions on the whiteboard say that we should stop
LEFT-DAQ first and then RIGHT-DAQ. However, in the case of
runs (#1601 and #20472) the RIGHT-DAQ reached the limit of
5M events before the LEFT-DAQ and consequently stopped
automatically before LEFT-DAQ.
00:35 When we started the next two runs (#1602 and #20473), we
first started the RIGHT-DAQ, which started normally and then
started the LEFT-DAQ, which didn't want to start. There was
an error: "Prestart failed". So we tried again and the
LEFT-DAQ started normally but with the next run number
#1603.
00:41 We noticed that the dead time for the RIGHT-DAQ went from 0%
to 22% and then up to 100%. Then the "ROC-8 no responding"
error appeared. We have decided to stop LEFT coda, kill Right
coda and restart it. When we tried to do that, the error
appeared that there is no more disk space left on the device.
The problem with disk space also appeared in the end-of-run
file of the left-coda.
I have contacted Brad and told him about this problem. He
explained to me that the "home" directory is full and he is
going to clean it. After that we restarted the RIGHT-DAQ and
started the both runs. However, the both DAQs reported the
"AUTOMATIC START OF CODA FAIL". Therefore we have decided to
kill both codas again, restarted them and started new runs
again. This time we did it more slowly. We didn't pressed both
start-run buttons quickly one after another but first started
the RIGHT-DAQ, than waited a while so that the start-of-run
window appeared for the left arm and than started the
LEFT DAQ. This time it worked.
I believe that the last crash happened because we started the
both codas to quickly. We should probably always start the
right-daq first, wait a while and then start the left daq.
01:00 Now we are again running normally. Dead time is 2% for
LEFT-DAQ and 0% for the RIGHT-DAQ. Current run numbers (after
the crash) are: #1605 and $20475.
We have changed the Event limit for the Right DAQ from the 5M
to 7M, so that HRS-R DAQ will not stop automatically before
HRS-L DAQ. The HRS-L event limit was left at 5M events.
01:33 After ending runs #1605 and #20475 we have started new HAPPEX
run #31282
03:50 Beam was gone for 7min
05:24 After ending runs #1612 and #20482 we have started new HAPPEX
run #31283
06:12 There was no beam for 11min
07:40 The Neutron detector has been turned ON
RUNS
----
LEFT HRS
------------------------- Runs from previous shift-------------------
22:11-22:33 #1598 3He possible produnction run, Num. ev = 4M, I = 6uA
22:34-23:04 #1599 3He possible produnction run, Num. ev = 5M, I = 6uA
23:04-23:36 #1600 3He possible produnction run, Num. ev = 5M, I = 6uA
23:36-00:13 #1601 3He possible produnction run, Num. ev = 4M, I = 6uA
------------------------- OUR RUNS ----------------------------------
00:15-00:15 #1602 JUNK!!!
00:16-00:40 #1603 3He possible produnction run, Num. ev = 5M, I = 6uA
(We ended the run because of the disk space problem )
00:55-00:55 #1604 JUNK!!!
00:59-01:33 #1605 3He possible produnction run, Num. ev = 5M, I = 6uA
01:36-02:09 #1606 3He possible produnction run, Num. ev = 5M, I = 6uA
02:09-02:39 #1607 3He possible produnction run, Num. ev = 5M, I = 6uA
02:29-03:11 #1608 3He possible produnction run, Num. ev = 5M, I = 6uA
03:11-03:40 #1609 3He possible produnction run, Num. ev = 5M, I = 6uA
03:40-04:20 #1610 3He possible produnction run, Num. ev = 5M, I = 6uA
04:20-04:53 #1611 3He possible produnction run, Num. ev = 5M, I = 6uA
04:53-05:24 #1612 3He possible produnction run, Num. ev = 5M, I = 6uA
05:26-05:57 #1613 3He possible produnction run, Num. ev = 5M, I = 6uA
05:57-06:39 #1614 3He possible produnction run, Num. ev = 5M, I = 6uA
06:39-07:11 #1615 3He possible produnction run, Num. ev = 5M, I = 6uA
07:11-07:43 #1616 3He possible produnction run, Num.ev =4.5M, I = 6uA
RIGHT HRS
------------------------- Runs from previous shift-------------------
22:11-22:33 #20469 3He possible produnction run,Num. ev= 3.8M, I = 6uA
22:34-23:04 #20470 3He possible produnction run,Num. ev= 3.9M, I = 6uA
23:04-23:36 #20471 3He possible produnction run,Num. ev =4.3M, I = 6uA
23:36-00:13 #20472 3He possible produnction run,Num. ev =5.0M, I = 6uA
------------------------- OUR RUNS ----------------------------------
00:15-00:40 #20473 3He possible produnction run, Num. ev =? , I = 6uA
(Coda crashed because of the disk space problem )
00:55-00:55 #20474 JUNK!!!
00:58-01:33 #20475 3He possible produnction run,Num. ev= 4.3M, I = 6uA
01:36-02:09 #20476 3He possible produnction run,Num. ev= 4.3M, I = 6uA
02:09-02:38 #20477 3He possible produnction run,Num. ev= 4.3M, I = 6uA
02:39-03:11 #20478 3He possible produnction run,Num. ev= 4.3M, I = 6uA
03:11-03:40 #20479 3He possible produnction run,Num. ev= 4.3M, I = 6uA
03:40-04:20 #20480 3He possible produnction run,Num. ev= 4.3M, I = 6uA
04:20-04:53 #20481 3He possible produnction run,Num. ev= 4.3M, I = 6uA
04:53-05:24 #20482 3He possible produnction run,Num. ev= 4.3M, I = 6uA
05:26-05:57 #20483 3He possible produnction run,Num. ev= 4.3M, I = 6uA
05:57-06:39 #20484 3He possible produnction run,Num. ev= 4.3M, I = 6uA
06:39-07:10 #20485 3He possible produnction run,Num. ev= 4.3M, I = 6uA
07:10-07:42 #20486 3He possible produnction run,Num. ev= 3.9M, I = 6uA