We present a low-noise Charge-Sensitive Preamplifier for HPGe detectors able to swiftly recover from saturation, featuring an auxiliary output signal used for high-resolution pulse-height spectroscopy of the over-range signals. Using the auxiliary output for analyzing the signals larger than similar to 15 MeV (mostly charged particles and heavy ions) and the principal preamplifier output for analyzing all other signals (ionizing radiations and charged particles) a wide overall spectroscopic energy range of 5keV to 180MeV is obtained. A single Pole-Zero adjustment serves both the principal preamplifier channel as well as the auxiliary output channel. The energy resolution of the auxiliary channel is better than 0.1% typically. The Equivalent Noise Charge of the preamplifier is 115 electrons r.m.s., i.e. similar to 0.8 keV fwhm, using a BF862 as input transistor operated at room temperature while simulating the detector with a capacitance of 22 pF..

A low noise preamplifier for HPGe detectors with auxiliary output for over range signal spectroscopy / A. Pullia, S. Capra (IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD). - In: 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)[s.l] : IEEE, 2016. - ISBN 9781467398626. - pp. 1-2 (( convegno NSS/MIC 2015 tenutosi a San Diego nel 2015 [10.1109/NSSMIC.2015.7581810].

A low noise preamplifier for HPGe detectors with auxiliary output for over range signal spectroscopy

A. Pullia
Primo
;
S. Capra
Secondo
2016

Abstract

We present a low-noise Charge-Sensitive Preamplifier for HPGe detectors able to swiftly recover from saturation, featuring an auxiliary output signal used for high-resolution pulse-height spectroscopy of the over-range signals. Using the auxiliary output for analyzing the signals larger than similar to 15 MeV (mostly charged particles and heavy ions) and the principal preamplifier output for analyzing all other signals (ionizing radiations and charged particles) a wide overall spectroscopic energy range of 5keV to 180MeV is obtained. A single Pole-Zero adjustment serves both the principal preamplifier channel as well as the auxiliary output channel. The energy resolution of the auxiliary channel is better than 0.1% typically. The Equivalent Noise Charge of the preamplifier is 115 electrons r.m.s., i.e. similar to 0.8 keV fwhm, using a BF862 as input transistor operated at room temperature while simulating the detector with a capacitance of 22 pF..
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/860111
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