Owl shift summary

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User name M Jones

Log entry time 08:03:38 on May 7,2009

Entry number 271423

keyword=Owl shift summary

Start shift taking data.

Ended Happex run 31333 at 00:29 with 459K events
Started Happex run 31334 at 00:30

Noticed that around 23:30 there was a jump in the hac_bcm_average
to about 12.5uA when IBC0L02 is at 10uA. Confirmed that the
BCM scalers also read about 12.5uA. Indicate problem with signal from cavities. Both cavities give 12.5uA.

Around 02:15 the hac_bcm_average jumps down to 10uA when IC0L02 is
10.2uA. In the rack in the middle room of the counting house looked
at the voltage from the BCMS and both BCMs are now at about 15V
when before they were around 19V when IC0L02 was 10uA. This confirms that the shift comes directly from the cavities.

Around 3:30 the hac_bcm_average jumps back up to 12uA when IC0L02 is
10uA.

Around 4:00 noticed that the Happex DAQ could not access roc26.
Tried to reboot roc26 through xterm but it hung. Not to make
access to physically turn roc26 off and on.

Run 1917 and 1918 had the left arm coda hang.
Needed to reboot roc3 to restart left arm coda.

Run 1919 has deadtime of 13% compare to 7% for previous
runs. Don't understand why deadtime rose after roc3 reboot.

Run Start time events Comment
---- ---------- ------- -------
1908/20816 23:46 2M/1.4M good run
1909/20817 00:31 2M/1.4M good run
1910/20818 01:21 2M/1.4M good run
1911/20819 02:05 2M/1.4M good run
1912/20820 02:53 2M/1.4M good run
1913/20821 03:36 2M/1.4M good run, no lumi data
1914/20822 04:20 2M/1.4M good run
1915/20823 05:04 2M/1.4M good run
1916/20824 05:50 2M/1.4M good run
1917/20825 06:36 junk
1918/20826 06:46 junk
1919/20827 06:53 2M/1.4M good run
1920/20828 07:43