User name Ramesh
Log entry time 11:26:31 on December22,2007
Entry number 222426
keyword=Four cables from the Hall patch pannel unplugged
I looked into a couple of channels in the patch pannel (third rack from the left when you face to the front of the rack) in the hall which has a label " 50 OHM TO COUNTING ROOM A". This rack is in the area where Moller DAQ, Compton DAQ and target electronics are located. The channel numbers 1, 17, 18, and 19 at the bottom patch pannel were not being used. I verified that by plugging in pulser in the corresponding channels in the middle room of the counting house patch pannel (bottom of the third rack from left when you face to the front of the rack) and seeng the pulser signal in the hall; when I unplugged the pulser in the counting room, I could not see any signal in the hall patch pannel channels. All cables that I unplugged are hanging there and have been taped togethere by a black tape. The labels of the unplugged cables are the following:
Channel 1: Trigger from raster VME in 1H75B10
Channel 17: Crys 03
Channel 18: BL 02
Channel 19: L W4-L3
We are going to use these unused patch pannel channels for the Compton DAQ for upcoming PREX test.
Note that the path pannel channels (1, 17, 18, and 19) in the counting house already did not have any cables plugged in there.