A new charge-sensitive preamplifier for High Purity Germanium gamma-ray detectors has been built and tested. It comprises an over-load recovery device that reduces the dead time brought about by hits of energetic particles. The amplitude of the large signals is reconstructed from Time-Over-Threshold measurements performed along the reset transients. Using such a technol. an extremely wide energy range of 10 keV to 30 MeV, or 70 dB, is obtained. With a count rate of 6 kHz a resoln. of 1.1 keV fwhm is obtained on the 152Eu 122 keV line and of .apprx.5 perthousand on pulser lines in the energy range of 5-30 MeV.
A low-noise preamplifier for gamma-ray sensors with add-on device for large-signal management / A. Pullia, F. Zocca. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 545:3(2005 Jun 21), pp. 784-792.
A low-noise preamplifier for gamma-ray sensors with add-on device for large-signal management
A. PulliaPrimo
;F. ZoccaUltimo
2005
Abstract
A new charge-sensitive preamplifier for High Purity Germanium gamma-ray detectors has been built and tested. It comprises an over-load recovery device that reduces the dead time brought about by hits of energetic particles. The amplitude of the large signals is reconstructed from Time-Over-Threshold measurements performed along the reset transients. Using such a technol. an extremely wide energy range of 10 keV to 30 MeV, or 70 dB, is obtained. With a count rate of 6 kHz a resoln. of 1.1 keV fwhm is obtained on the 152Eu 122 keV line and of .apprx.5 perthousand on pulser lines in the energy range of 5-30 MeV.
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