From MILLER@buphyc.bu.eduSat Jun 29 09:52:26 1996 Date: Tue, 25 Jun 1996 21:40:54 -0400 (EDT) From: James Miller To: carey@buphyc.bu.edu, cumings@BUPHY.bu.edu, dz@buphyc.bu.edu, earle@buphyc.bu.edu, hazen@buphyc.bu.edu, brhughes@BUPHY.bu.edu, miller@buphyc.bu.edu, monich@buphyc.bu.edu, ouyang@buphyc.bu.edu, roberts@buphyc.bu.edu, sulak@buphyc.bu.edu, varner@buphyc.bu.edu, worstell@buphyc.bu.edu, winn@fair1.fairfield.edu, prisca@mnhep.hep.umn.edu, timmer@mnhep.hep.umn.edu, kindem@mnhep.hep.umn.edu, dmiller@mnhep.hep.umn.edu, giron@physgi01f.phy.bnl.gov, morse@bnlcl1.bnl.gov, HERTZOG@UINPLA.NPL.UIUC.EDU, DEBEVEC@UINPLA.NPL.UIUC.EDU, urner@UINPLA.NPL.UIUC.EDU, brian@mephisto.physics.uiuc.edu, larsen@bnlcl1.bnl.gov, JONES@UINPLA.NPL.UIUC.EDU, deninger@UINPLA.NPL.UIUC.EDU, sedykh@UINPLA.NPL.UIUC.EDU, stillman@bnldag.ags.bnl.gov, bunce@bnldag.ags.bnl.gov, farley@bnldag.ags.bnl.gov, yannis@bnlcl6.bnl.gov, YIM@inp.nsk.su Subject: latest run summaries Resent-Date: Tue, 25 Jun 1996 21:41:29 -0400 (EDT) Resent-From: MILLER@buphyc.bu.edu Resent-To: dz@budoe.bu.edu, EARLE@BUPHY.bu.edu, hazen@budoe.bu.edu, monich@ftp.com, ouyang@cam.org, varner@uhhepi.phys.hawaii.edu Summary of runs for the night of June 20, 1996 Beam in the ring, no magnetic field, false inflector in place, 4 detector stations positioned in the first quadrant. -JM ______________________________________________________________ Summary of runs from 6/20/96 WFD trace number Run Evts 1 2 3 4 5 6 ______________________________________________________________ 246 cal 1b FSD3-1 FSD3-2 cal 1d cal 2b FSD2-2 new PMT clip clip 1-5 ungated playing with cables... 247 all -same- gated WFD 1 and 2 signals are clipped, so each channel is given a DC offset, and each channel readout is widened to be sure to catch the positive going part of the clipped signals. 248 all -same- raise threshold on WFD1: summed threshold=135, individual=20 one big event 249 all -same- raise threshold on WFD1 again: summed threshold=145, individual=25 WFD2 sum=35 ungated 250 all -same- ungated pulses too wide for unknown reason, reset width much lower 251 all -same- ungated 252 all -same- gated again 253 all put all four quadrants of cal 1 into WFD 1. This includes one quadrant clipped, another with an old tube, etc. There is still a DC offset in WFD 1. PSDs put into other channels. PSD thresh 126->50 254 all same but PSD 50->40. raise thresh on wfd2 to 20 255 return to setup of run 246, tune to muons during run 256 all -same- Down 2% in momentum (optimal for muons) 257 all -same- Down 3% in momentum 258 all -same- Down 3% in momentum Raise thresh on FSD Lecroy discs to 63 mV(they are way too busy compared to WFD thresh) 259 all -same- Down 3% in momentum Intermediate thresh on FSD Lecroy discs= 43 mV 4-end (?) events with no gating ? put gating pulse into trace 1 to check timing again 236 1 (left gating pulse in trace 1 for evt 1) 2-end same as 235 working on flux counter, checking for correlations with I.C. 237 all -same- adjusting down to muon injection 238 1 bases ungated 2-end as in 237 run at "muon"" injection flux counter does not see muons very well. Switch back to checking psds 239 4-end PSD1 PSD2 PSD3 -same as 234 (fsds)- Anode Anode Anode muon injection with gating 240 all same as 239 muon injection without gating 241 adjust WFD threshold down for traces 5 & 6, do "X scan" in PSD2 without gating using trace 6 1-3 PSD1A PSD2A PSD3A FSD1-2 FSD3-2 Tile X01 4-5 " " " " " Tile X05 6-8 Tile X10 9-16 Tile X15 18-20 Tile X20 21-22 Tile X28 242 same scan of PSD2 with gating 0-2 -same as 241- Tile X28 3-6 Tile X20 7-8 Tile X15 9-11 Tile X10 12-14 Tile X05 15-18 Tile X01