*** File to contain comments about FPP chambers *** *** 6/19/97 Pulser runs for chambers 3 and 4 Chamber 3 pulsed wires 1,2,3,4,5,6,7,8 for 500 events Data in directory /adaq2/data5/adaq/data which will be moved to MSS The files are e89003_ped_h_1511.dat thru e89003_ped_h_1518.dat Chamber 4 pulsed wires 2,3,4,5,6,7,8,1 for 500 events Data in directory /adaq2/data5/adaq/data which will be moved to MSS The files are e89003_ped_h_1521.dat thru e89003_ped_h_1528.dat To get pulses to all of chamber 4 needed to up the pulser amplitude from 1.5V for chamber 3 pulser runs to 2.0V. *** 6/19/97 No Beam at 20:00 MKJ CH1 HV Ch2 HV Ch3a HV CH3b HV Ch4 HV ------ ------ ------ ------ ------- 1875 1875 1900 1875 1875 Ch2 has channel 7.1.10 tripped tried to reset but tripped again. Left 7.1.10 off *** 6/20/97 at 6.00pm KW Checked the HV on the chambers, Found Ch2 Channel 7.1.10 has tripped.Tried to reset but tripped at 1850 .Reset to 1840 V. Channel # Chamber# Current (MicroA) High voltage (V) -------- -------- --------------- ----------------- 7.1.0 1 0.02 1875 5 7.1.1 1 0.02 " 7.1.2 1 0.00 " 7.1.3 1 0.01 " 7.1.4 1 0.00 " 7.1.5 1 0.00 " 7.1.8 2 0.05 1838.9 7.1.9 2 0.06 " 7.1.10 2 0.05 " 7.1.11 2 0.07 " 7.1.12 2 0.09 " 7.1.13 2 0.07 " 8.1.1 3 1.83 1900.0 8.1.2 3 2.55 " 8.1.3 3 3.80 " 8.1.5 3 0.18 " 8.1.8 4 0.01 1875.2 8.1.9 4 0.04 " 8.1.10 4 0.06 " 8.1.11 4 0.01 " 8.1.12 4 0.03 " 8.1.13 4 0.01 " 8.1.16 3 8.3 1875 8.1.17 3 13.7 1875 *** *** 6/21/97 at 12:00pm MKJ 8.1.8 was tripped , reset 8.0.1 7.1.10 should be moved to third master HV Channel # Chamber# Current (MicroA) High voltage (V) -------- -------- --------------- ----------------- 7.1.0 1 0.18 1875 5 7.1.1 1 0.72 " 7.1.2 1 0.18 " 7.1.3 1 0.33 " 7.1.4 1 0.65 " 7.1.5 1 0.19 " 7.1.8 2 0.43 1838.9 7.1.9 2 0.48 " 7.1.10 2 0.26 " 7.1.11 2 0.36 " 7.1.12 2 0.64 " 7.1.13 2 0.22 " 8.1.1 3 9.65 1900.0 8.1.2 3 17.8 " 8.1.3 3 11.1 " 8.1.5 3 0.96 " 8.1.8 4 0.96 1875.2 8.1.9 4 0.96 " 8.1.10 4 0.45 " 8.1.11 4 0.38 " 8.1.12 4 0.24 " 8.1.13 4 0.24 " 8.1.16 3 8.3 1875 8.1.17 3 13.7 1875 *** 6/23/97 9:20am MKJ The threshold voltages were at zero. Set them to 3.0 for front and 7.0 rear. **** 6/23/97 3.00pm KW Checked the the HV and the currents, every thing looks fine.But No Beam!! ****** 6/25/97 8:30am MKJ CHeck HV. It is off to FPP. It was done to reduce event size. ******** 6/29/97 8:30am MKJ Turn on HV to FPP since data rate and deadtime low. ******* 6/29/97 12:20am MKJ Check HV. 7.1.10 has tripped again. Other channels ok. Could not get 7.1.10 to hold HV at 1840V so left it off. ***** 7/12/97 11:00am MKJ Check HV. CHambers 1 and 2 have been holding steady at 1875V since fixing problem with Module 8 on V side of Ch 2. CH2 is drawing around .2-.3 uA on all channels. CH1 is drawing around .01-.04 uA. CH3 channels 8.1.1, 8.1.2, 8.1.3, 8.1.5 drawing .35,.30,.90,.20 uA at 1900V. CH3 channels 8.1.16,8.1.17 drawing 20., 28. uA at 1900V, lower to 1875 and drawing 5.5,10.5 . On 7/9/97 the all CH3 channels drawing less than 1 uA. Channels 8.1.16 and 8.1.17 were drawing around 13uA at 1900V yesterday. CH4 all channels drawing between .01 to .08 uA at 1900V. *****