Charge Sensitive Preamplifier and Pulse Shaper using CMOS process for Germanium Spectroscopy
NAVAL RESEARCH LAB WASHINGTON DC
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We have developed a low noise, low power charge sensitive amplifier and pulse shaping circuit. Our application is for a double-sided germanium strip detector, nominally providing 50 independent spectroscopy channels. An array of these detectors would provide significant improvements in imaging, spectroscopy, and sensitivity for space-based gamma-ray astronomy. The key features of these electronics are low noise, very low power, and small footprint per channel. Performance of our first circuit is in good agreement with simulations, with -205e noise rms 0 pF, and 3 mWchannel power consumption. Dynamic range is 0-3.3 MeV germanium with a linearity of plus or minus 0.6. Performance of this prototype device will be discussed.
- Atomic and Molecular Physics and Spectroscopy