Continued with the Cherenkov threshold study. Took data at the+10%
HV setting (CC_TOF_1300_10percent.sql) and changed CC thresholds.
Summary: (rates for CCs are in kHz at 80 mA)
runs threshold L0 L1 L2 L3 R0 R1 R2
R3 N events
------------------------------------------------------
2487-2490 25 mV 288 248 113 34 451 186 202
56 1.7 M
2496-2498 35 mV 263 199 84 29 360 153 167
45 1.5 M
2499-2501 45 mV 279 156 59 17 262 115 114
33 1.5 M
2502-2505 65 mV 109 130 40 9 184 80 89
26 1.5 M
2506 85 mV 223 114 28 4 156 56
76 21 0.5 M
- there was some trouble when /scratch/dblast07/ filled up. The symptom
was that the
coda event rate was 1/100 of the physics rate. So (with Tancredi's
permission) we deleted
about 300 old runs from dblast07, after confirming that they were indeed
backed up on the
spuds. The runs we deleted are 1990-2299. It is probably a good idea
to check how full
dblast07 is during your shift (just do a %df /scratch/dblast07) to make
sure this doesn't happen
while you're taking data.
- Continued working on asymmetries. I zoomed in on the paddle
combinations
that had clear proton peaks (using show_protons.C -c padc_cc, as
Tancredi suggested)
and picked some cut windows and entered them in cut.C. However, I still
could not
figure out the right way to select the cuts (prot or plnn or prnn) so
still not much to say here.
(I did implement a cut for one paddle combination (12-2) and put them in
explicitly. these are
still in cut.C as 'testleft' and 'testright', and they are OR'd together
as 'testor', and this does
indeed give a nice proton peak for the chosen combination, there is
still a sizeable LR asymmetry)
the original cuts.C is stored as cuts.C_1132. I think the problem has
to do with how init.C interprets
the string you give it (-c cut). maybe chris has more to say about
this? it seems that it doesn't
recognize the cut since in cuts.C the real cut is an element of a TCut
array.
- Tavi took over at 3pm to continue gain matching the Cherenkovs.
JS BC
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:28 EST