Difference between revisions of "Some specifications on PMTs"
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# 1.1 μ A electron current, <math>10^{-4} X_{0}</math> radiator | # 1.1 μ A electron current, <math>10^{-4} X_{0}</math> radiator | ||
(corresponds to the photon flux of <math>5x10^{7}</math> phot/sec in the cohrent peak region) | (corresponds to the photon flux of <math>5x10^{7}</math> phot/sec in the cohrent peak region) | ||
| + | # Counter rate around E_gamma = 9 GeV: 1 - 1.5 MHz | ||
| + | (counter withd 20 MeV) | ||
Revision as of 15:41, 14 September 2012
Light yield estimates
- 5 mm thick scintillators
- 10000 initial photons per tagged electron
- assume that 2000 photons are collected (20 % light collection efficiency)
- 400 p.e. (assuming 20% quantum efficiency)
Counter rates (according to the latest Dan's design)
- 1.1 μ A electron current,
radiator
(corresponds to the photon flux of 
phot/sec in the cohrent peak region)
- Counter rate around E_gamma = 9 GeV: 1 - 1.5 MHz
(counter withd 20 MeV)
