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User name brads
Log entry time 15:11:38 on November 24, 2008
Entry number 250570
keyword=BB Cerenkov ADC vs MWDC postion, vice versa
Figures 1, 2, 3 are from run 3713 (1 uA, optics target).
Figure 4 is from run 3588 (6 uA, 3He target).
Figure 5 is from run 3587 (1 uA, 3He target).
Cerenkov ADC pedestals have been roughly aligned to channel 200 rather
than zero to watch for below-ped weirdness in the spectra.
Cuts applied to all histograms include:
cut1 = Form("(!DL.edtpl)");
cut1 += Form("&&(DL.evtypebits&1<<1||DL.evtypebits&1<<6)");
cut1 += Form("&&(abs(BB.tr.vz)<0.18)");
cut1 += Form("&&(BB.ts.ps.e>500)");
Figure 1: MWDC x vs. y with no cut on Cerenkov ADC.
Figure 2: MWDC x vs. y with cut on (ped subtracted) Cerenkov ADC > 50.
Figure 3: Cerenkov ADC with
red: 'shower row sum' cuts similar to Sh+Cer trigger set up.
The shower row sums don't seem to be gain-matched though, so
don't read much into the red curves.
blue: position cuts extracted from Figure 2.
Beam-right ADC show some promise. Beamline side still has a lot of garbage.
Still working on a sensible 'electron' cut for BB singles. I need to ask
the experts a bunch of questions this afternoon.
A copy of this log entry has been emailed to: meziani
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
