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Cryogenic Performance of a Low-Noise JFET-CMOS Preamplifier for HPGe Detectors.
- Source :
-
IEEE Transactions on Nuclear Science . Apr2010 Part 2 of 2, Vol. 57 Issue 2, p737-742. 6p. 3 Diagrams, 2 Charts, 11 Graphs. - Publication Year :
- 2010
-
Abstract
- 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 μs 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189499
- Volume :
- 57
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Nuclear Science
- Publication Type :
- Academic Journal
- Accession number :
- 49533461
- Full Text :
- https://doi.org/10.1109/TNS.2009.2038697