[BLAST_SHIFTS] BLAST daily op meeting/runplan

From: Tancredi Botto (tancredi@lns.mit.edu)
Date: Tue Apr 06 2004 - 17:08:22 EDT


Some problem with the blast power supply seem to be solved only at 4.30
Ben is in the pit to measure the field at BATS location

After that field will be ramped down to close pit and let genya tune the ABS for
hydrogen, holding field 45 deg on beam left and full blast inbending field. There
is a question regarding ABS alignement and intensity. During past runs in feb for
inbending/outbending the ligit pressure was 6.8/7.0e-8. Should the intensity be
very much lower than please call the run coordinator to see for an alt plan, for
instance unpol H2. There will be no chance to adjust the ABS until tomorrow.

Plan is as follows

_ use newphys_kd_BATS.settings (see entry #22226)

_ compare deadtime for runs with BATS hv on/ hv off (see entry #21973)

_ note that the prescale factor for singles is still 10. If the deadtime
  is <20% then please try to decrease the prescale factor for singles.
  For that I have prepared two read-out lists. Go to pro/coda and

* to put the single (trig 7) prescale factor to 3 do
cp -pf ts2_pro2004_pri_ps7_3.o /usr/local/blast/daq/obj/ts2_pro2004_pri_ps7.o

* to put the single (trig 7) prescale factor back to 10 do
cp -pf ts2_pro2004_pri_ps7_10.o /usr/local/blast/daq/obj/ts2_pro2004_pri_ps7.o

_ Hopefully we can run with a lower prescale factor and the BATS on

_ Measure polarized hydrogen all night, making sure the target flips !!

________________________________________________________________________________
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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