1. HCAL – SiPM upgrade requirements
Workshop in Trieste on June
A.H Heering, Boston University
11/16/2018

2. HCAL current baseline readout
Inside the magnet:
HB 144 x 19 channel HPDs (16 layers)
HE 144 x 19 channel HPDs (16 layers)
Outside the magnet:
HO 132 x 19 channel HPDs (1-2 layers)
HF 1800 one inch PMTs.
A.H Heering, Boston University
11/16/2018

3. A.H Heering, Boston University
CMS Ring YB0
A.H Heering, Boston University
11/16/2018

4. A.H Heering, Boston University
Test Beam setup
Due to the cosine effect of the Angle we have lowest light in YB1
(YB0 has 2 layers)
A.H Heering, Boston University
11/16/2018

5. Developed; Custom FBK SiPM
A.H Heering, Boston University
11/16/2018

6. A.H Heering, Boston University
HO with SiPM readout
A.H Heering, Boston University
11/16/2018

7. A.H Heering, Boston University
Typical SiPM pulse
A.H Heering, Boston University
11/16/2018

8. SiPM-QIE Interface Circuit diagram
S. Los (FNAL)
To match the gain of the readout we used a factor of 5 lower couple capacitor
Using R5 we hope to shape the pulse shape and cancel the tails
A.H Heering, Boston University
11/16/2018

9. A.H Heering, Boston University
Pulse shape after QIE
1 TS=25 ns
A.H Heering, Boston University
11/16/2018

10. 2006 First Test Beam results
A.H Heering, Boston University
11/16/2018

11. A.H Heering, Boston University
HPD muon in HO YB1
A.H Heering, Boston University
11/16/2018

12. 2007 Test beam FBK custom diode
(Used cells)
A.H Heering, Boston University
11/16/2018

13. 2007 Test beam CPTA 2x2 mm diode
We used light mixer
A.H Heering, Boston University
11/16/2018

14. Linear range is worst then HPD
A.H Heering, Boston University
11/16/2018

15. 300 GeV pion resolution in 3x3 towers
ECAL + HCAL
SiPM
HPD
No indication that late showers give worst resolution as baseline HPD
A.H Heering, Boston University
11/16/2018

16. Measured Temperature coefficient
A.H Heering, Boston University
11/16/2018

17. Production Cooling and stabilization
A.H Heering, Boston University
11/16/2018

18. Radiation study in October 2007
A.H Heering, Boston University
11/16/2018

19. Radiation damage for 240 MeV Protons
Custom 6 mm2 FBK SiPM
Annealing
1 day
4 doses of 2.5E9
2 doses of 1E10
4 doses of 2.5E9
IRST Sample 1
Total dose of 1E10 p/cm2
IRST Sample 2
Total dose of 3E10 p/cm2
A.H Heering, Boston University
11/16/2018

20. Scope traces during radiation
A.H Heering, Boston University
11/16/2018

21. A.H Heering, Boston University
1mm^2 diodes
A.H Heering, Boston University
11/16/2018

22. A.H Heering, Boston University
I_leakage vs Ped_rms
A.H Heering, Boston University
11/16/2018

23. FBK single cel single PE (pedestal distributions)
A.H Heering, Boston University
11/16/2018

24. Damage and QE (one day annealing) T=27 degree C
A.H Heering, Boston University
11/16/2018

25. Dead time of micro cells
A.H Heering, Boston University
11/16/2018

26. Signal –Pedestal during radiation
A.H Heering, Boston University
11/16/2018

27. Signal –Pedestal during radiation
Large dead time
A.H Heering, Boston University
11/16/2018

28. Radiation levels in HCAL
HB – n/cm2/ CMS Year
HE – 3 * n/cm2/ CMS Year
HO – n/cm2/ CMS Year
HF – n/cm2/ CMS Year
A.H Heering, Boston University
11/16/2018

29. A.H Heering, Boston University
Dead time shorter??
A.H Heering, Boston University
11/16/2018

30. A.H Heering, Boston University
PDE vs Company
HB,HE,HO HF
A.H Heering, Boston University
11/16/2018

31. Smaller cells vs Linearity (deadtime!)
A.H Heering, Boston University
11/16/2018

32. New devices with 10 micron cells
I. Musienko
A.H Heering, Boston University
11/16/2018