Simulation program/CR flux model/Data processing

1
Simulation program/CR flux model/Data processing

1. Implement proton/alpha/e-/e/gamma/muons.
2. Take into account the fact that three layers did
   not participate in trigger.
3. Not use CAL data in TKR reconstruction (to avoid
   skewed chi2 distribution).
4. Require event number spacing to be multiples of
   10 (to avoid biased sampling).
5. Reduce production length in simulator
   0.4mm(e-/e) and 0.1mm(gamma) -gt 0.01mm.
6. Fix lots of minor bugs in CR flux model and
   geometry in simulator.
7. Implement closeout and TKR electronics (info.
   from R. Johnson and B.J.). lt-New
8. Implement support structure as much as possible.
   Increase density of them (Al) to take into
   account the missing (within P.V.) mass
   effectively. lt-New
9. Not implement materials outside P.V. (e.g.,
   Gondola).

Item 7 improves the TKR hit distribution of
neutrals(p.2) and 8 the number of reconstructed
track distribution(p.4).
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TKR hit distribution (1)
Hit rate of each layer for charged events (left)
and neutral ones (right).
neutral events
charged events
data
muon
gamma upward
gamma
e-/e
gamma downward
proton
alpha
3
TKR Hit Distribution (2)
Hit rate of each layer for charged events, in
which the primary track (the one reconstructed
program gives back first) is straight (left) and
bent (right).
straight track events
bent track events
4
of reconstructed tracks
of reconstructed tracks for charged events
(left) and neutral ones (right).
neutral events
charged events
5
Summary

• By updating geometry, we got better distribution
  of the number of reconstructed tracks and hit
  distribution of neutrals. (p.2 and 4)
• Straight track events (most of them are produced
  by proton/alpha primaries) are reproduced well
  (p.3).
• Small discrepancies are seen in neutral events
  and bent track events (right figures in p.2 and
  3). -gt uncertainty of e-/e/gamma
• spectra and angular distribution could explain
  this.