Transcript of HBD Meeting 2010 / 11/ 24 Katsuro 1. confirmation plan for HBD simulation performances 2 HBD charge...
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- HBD Meeting 2010 / 11/ 24 Katsuro 1
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- confirmation plan for HBD simulation performances 2 HBD charge
distribution Red: merged cluster Blue: separated cluster important
features of HBD compare HBD charge distribution for single
electrons cluster size distribution for single electrons need to
check these distributions
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- clustering algorithm 3 HBD charge [p.e.] seed pad seed pad seed
pad Clustering Algorithm make a cluster with seed pads add neighbor
pads to the cluster cluster charge is the sum of pad charges seed
pad: pad with large charge (> 3p.e.) SNSN
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- Run Selection and Electron Cut reject runs including many dead
pads on HBD gain looks reasonable electron cut abs(bbc_z) < 20cm
quality==31|51|63 n0>=2 e/p cut ecore>0, mom>0
abs(emcsdphi_e)
- change offline pad charge threshold apply new offline pad
charge cut pad charge > 3 p.e. (old threshold: 1p.e.) reject
online threshold effect reject inhomogeneous efficiency on pad
online threshold 23
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- HBD size distribution cell charge cut (>3p.e.) (East) 24 low
eff. low stat. not stable Black: Dalitz data (single e cluster)
Green: J/psi data (unlike - like) Red: simulation HBD Sect 1 SHBD
Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect
4 SHBD Sect 4 N
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- HBD size distribution cell charge cut (>3p.e.) (West) 25 low
stat. Black: Dalitz data (single e cluster) Green: J/psi data
(unlike - like) Red: simulation HBD Sect 7 SHBD Sect 7 N HBD Sect 8
SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N
HBD Sect 11 SHBD Sect 11 N
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- HBD size distribution. (East) center cut && cell charge
cut (>3p.e) 26 low eff. low stat. not stable Black: Dalitz data
(single e cluster) Green: J/psi data (unlike - like) Red:
simulation HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD
Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N
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- HBD size distribution (West) center cut && cell charge
cut (>3p.e.) 27 low stat. Black: Dalitz data (single e cluster)
Green: J/psi data (unlike - like) Red: simulation HBD Sect 7 SHBD
Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect
10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N
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- HBD cell charge distribution creating HBD pad charge
distribution for single electron track seed pad seed pad seed pad
reconstructed electron track e HBD cell charge entry/#{e track}
fill cell charge to histo scaled by the number of e tracks integral
is equivalent to average cluster size 28
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- HBD cell charge distribution (East) Black: data Green: J/psi
(unlike like ) Red: simulation low eff. low stat. not stable 29 HBD
Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect
3 N HBD Sect 4 SHBD Sect 4 N
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- HBD cell charge distribution (West) Black: data Green: J/psi
(unlike like ) Red: simulation low stat. 30 HBD Sect 7 SHBD Sect 7
N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10
SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N
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- center region cut select tracks passing good region on HBD 31
accept region accept region 26.5cm 22.9cm 18.0cm 14.0cm
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- HBD cell charge distribution center region cut (East) Black:
data Green: J/psi (unlike like ) Red: simulation low eff. low stat.
not stable 32 HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD
Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N
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- HBD cell charge distribution center region cut (West) Black:
data Green: J/psi (unlike like ) Red: simulation low stat. 33 HBD
Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect
9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N
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- discussion HBD cluster charge distribution is roughly
consistent but cluster size distributions seem not to be consistent
gain-adjustment makes a consistent in cluster-size distributions of
data and simulation ??? HBD simulator Cherenkov photon generate
photo-electrons on CsI generate a gain with a probability
distribution (exp (+gaus)) for each photo-electron changing
exponential slope (=gain) ??? 34