チェレンコフ光を利用した 粒子識別装置の開発

TOP for g4superb

Geometry

18 TOP modules


3-readout type for g4superb
Support structures


Honeycomb plates
Aluminum cylinders
1
g4superb-top

Hits


Light propagation in
quartz
TDC output to panther
table with PMT
smearing
2GeV/c, q=70o
2
rectop

Reconstruction code



For 3-readout type
Reconstruct ring image (=P.D.F.)
Input

PMT hit; Dattop_pmt


Tracking info; rectrk


Channel number, TDC
Incident position and angle
Output

Likelihood for e,m,p,K,p assumptions
3
P.D.F. distributions
2GeV/c,
q=70deg.
p- incidence
K- incidence
p assumption
K assumption

Well reconstructed P.D.F.

Maybe small time offset
4
Output

Likelihood ratio (p/K)

Number of photons
p- incidence
K- incidence
p- incidence
K- incidence

Reasonable output
5
Summary

Basically working well




Correct light propagation and TDC distribution
Proper Ring image reconstruction
Output likelihood as expected
To Do

Check performance for several incident momenta and
angles
6