[BLAST_SHIFTS] just a reminder for data taking

From: Tancredi Botto (tancredi@mitlns.mit.edu)
Date: Thu Jun 05 2003 - 19:20:33 EDT


For taking asymmetry data tonight and tomorrow:

_ We use 2 state flipping on H2
        cd ~/pro20003/ABS; ABSsoft h_2st_flip...
- L/T holding field on, blast field on
_ Beam current max is 60 mA. Watch for cell temperature changes.
_ trigger is physics.settings
_ coda configuration is physrun
_ The Wch thresholds are 3.0 V.
_ "good" BQM values are 120/100/40/60 with slits in. Lifetime should be
   very smooth as function of current, and generally above 20 mins. See logbook
_ hv is controlled by epics (no warnevent at the moment, dies after one fill)
_ epics is started *by hand* on the green window by the coda runcontrol screen
_ caserver may die (after warnevent dead you won't notice)
_ Compton: see BF email
_ The onlineGui is running on dblast14. It shows the wch S/N and all L/R
  data online. Hit start, clear and then start to start fresh
- After a run is taken, analysis is done with "root lrn.C ###". Do also
  "root charge.C ###" and then "root flrn.C ####" to filter and process charge
- The new lrn is ready but you'll still use the old one tonight.
_ Please mark analysed runs on the runsheet. Extra runsheets in ~pro2003/runsheet

_ IMPORTANTLY: please pay attention to ABS spin bits and ABS C-tube. You should
  see beam helicity and abs spin change state. Ask available target expert.
  Beam helicity should only change during refill of the ring.

_ Look at the reconstructed data.

- tancredi
________________________________________________________________________________
Tancredi Botto, phone: +1-617-253-9204 mobile: +1-978-490-4124
research scientist MIT/Bates, 21 Manning Av Middleton MA, 01949
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