1. Scintillator HCal R&D Update
Vishnu V. Zutshi
for
NIU/NICADD

2. V. Zutshi,ALCPG04,Victoria
Introduction
Snapshot of past results
Photo-detector characterization
X-talk
Reflectors
Summary
11/23/2018
V. Zutshi,ALCPG04,Victoria

3. V. Zutshi,ALCPG04,Victoria
Digital HCal with Scintillator
Density based PFA
Snapshot of past results I
Needs validation in test beam
11/23/2018
V. Zutshi,ALCPG04,Victoria

4. Stack & Tile Fabrication
~15pe/mip
Snapshot of past results II
11/23/2018
V. Zutshi,ALCPG04,Victoria

5. Tile-Fiber-Reflector Optimization
Snapshot of past results III
11/23/2018
V. Zutshi,ALCPG04,Victoria

6. V. Zutshi,ALCPG04,Victoria
Relative LY
cast
Snapshot of past results IV
extruded
11/23/2018
V. Zutshi,ALCPG04,Victoria

7. V. Zutshi,ALCPG04,Victoria
SiPM/MRS
~1000 pixels on 1mm x 1mm
Bias voltage ~ 50-60V
Gain ~ 106
Quantum x geom ~ 12-15%
11/23/2018
V. Zutshi,ALCPG04,Victoria

8. V. Zutshi,ALCPG04,Victoria
Count Rate vs. Bias
Green LED(~130Hz) with clear fiber used
11/23/2018
V. Zutshi,ALCPG04,Victoria

9. Noise Amplitude vs. Bias
11/23/2018
V. Zutshi,ALCPG04,Victoria

10. Signal Amplitude vs. Bias
11/23/2018
V. Zutshi,ALCPG04,Victoria

11. SiPM Signal & Pedestal examples
42.5V
43.5V
11/23/2018
V. Zutshi,ALCPG04,Victoria

12. MRS Signal & Pedestal examples
50.5V
52.0V
11/23/2018
V. Zutshi,ALCPG04,Victoria

13. V. Zutshi,ALCPG04,Victoria
S/N vs. Bias
11/23/2018
V. Zutshi,ALCPG04,Victoria

14. V. Zutshi,ALCPG04,Victoria
Dark Rate
11/23/2018
V. Zutshi,ALCPG04,Victoria

15. Temperature dependence
-3%/oC
11/23/2018
V. Zutshi,ALCPG04,Victoria

16. Photo-detector Irradiation
Detectors sent to Michigan gamma irradiation facility
Dosage ~ 1MRad
Comparison of noise and signal detection before and after irradiation
Plan to irradiate with protons
11/23/2018
V. Zutshi,ALCPG04,Victoria

17. MRS before/after irradiation I
11/23/2018
V. Zutshi,ALCPG04,Victoria

18. MRS before/after irradiation II
11/23/2018
V. Zutshi,ALCPG04,Victoria

19. MRS before/after irradiation III
11/23/2018
V. Zutshi,ALCPG04,Victoria

20. V. Zutshi,ALCPG04,Victoria
Photo-Detector Scan
Clear fiber
Oscilloscope
Amplifier
Photodetector
LED Driver
LED
In collaboration with
P. Polozov & G. Sellberg
11/23/2018
V. Zutshi,ALCPG04,Victoria

21. V. Zutshi,ALCPG04,Victoria
Scan Results I
11/23/2018
V. Zutshi,ALCPG04,Victoria

22. V. Zutshi,ALCPG04,Victoria
Scan Results II a
11/23/2018
V. Zutshi,ALCPG04,Victoria

23. V. Zutshi,ALCPG04,Victoria
0.3% per side
X-talk (wrapped)
2.56 uA
90Sr
PMT
+ mixer
2.49 uA
2.72%
Crosstalk + Spillover
PMT
+ mixer
90Sr
0.04 uA
1.56%
Spillover
90Sr
PMT
+ mixer
11/23/2018
V. Zutshi,ALCPG04,Victoria

24. V. Zutshi,ALCPG04,Victoria
X-talk (mated)
1.3% per side
11/23/2018
V. Zutshi,ALCPG04,Victoria

25. Reflector Performance
11/23/2018
V. Zutshi,ALCPG04,Victoria

26. Uniformity and Reflectors
11/23/2018
V. Zutshi,ALCPG04,Victoria

27. V. Zutshi,ALCPG04,Victoria
Summary
Good progress on scintillator-based digital hadron calorimetry R&D studies has been made(2 papers accepted for publication).
Focus has shifted now to construction and commissioning issues for the test beam prototype where all this can finally be put to the test.
11/23/2018
V. Zutshi,ALCPG04,Victoria