1. SoLID EC photonsensor

2. Field (1.5T) Insensitive photonsensor
APD
Pro: not sensitive to field, large QE (0.8)
Con: radiation sensitive, low gain , bias V sensitive, noise
SiPM
Pro: not sensitive to field, high gain (1e6)
Con: radiation sensitive (worse than APD), bias V sensitive, noise
VPT (Vacuum Phototriode)
Pro: radiation hard, high rate capability, not very sensitive to field within certain angle
Con: low gain 10-40
Finemesh PMT
con: only works up to 2.5kG within certain angle, expensive ($1600?)
Previously used PMT R

3. estimation 2e4 photons for 2GeV electron 50ns pulse width 0.8 QE (APD)
Gain 100 (APD)
50 ohm
2e4/50e-9*.8*1.6e-19*100*50=0.3mV
Need 1e3 amplification

4. Panda APD CMS 5x5mm2 10x10mm2 new excellent performance
in collaboration with Hamamatsu Photonics
CMS
5x5mm2
10x10mm2
new
excellent performance
at RT and T = –25oC
radiation resistent
up to 1013 protons
in particular at T = -25oC
final concept: LAAPDs/crystal,
separately readout
dimensions
7 x 14 mm2
July 8, 2012
CALOR R.W.Novotny

5. spectrum Panda APD see light below 500nm S8664-1010 (10mmx10mm)
C shortwave length type
(5mmx5mm)

6. Panda preamplifiers (low noise, low power)
design of descrete components
for prototype studies
18mm
ASIC (APFEL) large dynamic range
2 channels/ 2 ranges
overall range 1 –
noise level (cooled)
<< 2 MeV
July 8, 2012
CALOR R.W.Novotny

7. HallD BCAL SiPM Dark rate increase by factor of 10
for 10e9 eq 1MeV neutron
preproduction unit of S (X) MPPC with 50 m pixels, equivalent to new
S12045.
SPMArray unit based on ceramic design with 35 m pixels - Wafer Batch Code X4151-
05 using SPM3035 design.

8. VPT Field insensitive within 30 degree at 1.8T
Preamiplifier needs to be close to VPT
RIE St. Petersburg, Russia
Tetrode (photo cathode, 2 dynodes, anode)
G = 24 – 45
QE = 14 – 20%

9. Finemesh PMT Has closely spaced mesh dynodes
Need to be around 30 degree to work with 1.5T

10. backup

11. WLS has light around 500nm

12. Hamamatsu has no APD for 500nm? http://sales.hamamatsu.com/index.php?id=13196302

13. Photon radiation 60Co photon 1.2MeV
1e12 photon is 1.2e9 GeV or J
The remeasurements of the APD characteristics have been done after a storage of the diodes at room temperature in the order of one month

14. Neutron radiation