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  Cryogenic Performance of a Low-Noise JFET-CMOS Preamplifier for HPGe Detectors

Budjas, D., Cattadori, C., D'Andragora, A., Pullia, A., Riboldi, S., & Zocca, F. (2010). Cryogenic Performance of a Low-Noise JFET-CMOS Preamplifier for HPGe Detectors. IEEE Transactions on Nuclear Science, 57(2), 737-742. doi:10.1109/TNS.2009.2038697.

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Budjas, Dusan1, Autor           
Cattadori, Carla2, Autor
D'Andragora, Alessio2, Autor
Pullia, Alberto2, Autor
Riboldi, Stefano2, Autor
Zocca, Francesca2, Autor
Affiliations:
1Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549              
2Univ Milan, Dept Phys, I-20133 Milan, Italy Univ Aquila, I-67010 Laquila, Italy Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Laquila, Italy Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20133 Milan, Italy, ou_persistent22              

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 Zusammenfassung: Cryogenic low-noise charge sensitive preamplifiers have been developed and realized for the GERmanium Detector Array (GERDA). An integrated JFET-CMOS preamplifier, which is fully functional at cryogenic temperatures, has been tested in conjunction with an unsegmented p-type HPGe detector. Both the crystal and the preamplifier were operated inside a liquid nitrogen dewar at 77 K. The detector capacitance was ~60 pF. An optimum resolution of 1.6 keV FWHM has been obtained for the pulser line at 6 microsecond shaping time. A resolution of 2.1 keV FWHM has been achieved for the 1.332 MeV line from a 60Co source. A wide bandwidth (rise time of ~16 ns) permits use of pulse-shape analysis techniques to localize the position of the photon interactions inside the crystal. A low power consumption (~23 mW) makes the preamplifier suitable for a multi-channel array of germanium detectors.

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Sprache(n): eng - English
 Datum: 2010-04-14
 Publikationsstatus: Erschienen
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Titel: IEEE Transactions on Nuclear Science
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 57 (2) Artikelnummer: - Start- / Endseite: 737 - 742 Identifikator: ISSN: 0018-9499