1. Geometry of WLS bar + Fiber
EJ-280 WLS Plastics( ELJEN technology)
( Similar to BC-482 from St. Gobain)
Coupled to SiPM
Emission spectrum was implemented.

2. Optical Fiber (from Kuraray)

3. Simulation result Geometry( Bar+Fiber+SipM) implemented.
‘Wavelength shift’ process was on.
But it didn’t seem working.
( expected the emission spectra of
WLS)
3. Need investigations.
(nm)
Photon wavelength spectrum at SiPM

4. Position by Time difference
Continuous X-tal.
TOP : Anger Logic
(Energy weighted Position)
Bottom:
Using time difference.
Pick-up the max. E TL.
(T1-T2)*(1.0mm/0.01ps)/2 mm

5. Pixelated X-tal
Beam X = 0.5mm
Beam X = 4.0mm mm mm
0mm
4.25mm

6. Plan Abstracts for IEEE pixelated X-tal configuration.
continuous X-tal configuration.