The calorimeter CALIFA for R3B at FAIR - GSI WWW-WIN
The calorimeter CALIFA for R3B at FAIR - GSI WWW-WIN
The calorimeter CALIFA for R3B at FAIR - GSI WWW-WIN
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Electronics<br />
• Gain stabilis<strong>at</strong>ion of APDs<br />
(Mesytec & TUM, IEM/CSIC, TUD)<br />
T: 10°C 23°C<br />
• Dynamic range problem:<br />
ΔE=10 keV <strong>at</strong> 100 keV 5 keV/bin<br />
BUT: 200 MeV would need a 40k peak sensing ADC … not existing<br />
Possible solutions:<br />
- 2 parallel chains with different sensitivities … expensive<br />
- logarithmic preamp … hard to calibr<strong>at</strong>e<br />
- digital system with TOT (time-over-threshold)<br />
… very promising! R. Gernhäuser et al. (TUM)<br />
February 9-10, 2011 | HIC <strong>for</strong> <strong>FAIR</strong> - PB5 Workshop, Darmstadtium | Thorsten Kröll | IKP, TUD | 12
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