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Publikācija: Performance of a Miniature Mechanically Cooled HPGe Gamma-Spectrometer for Space Applications

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Contract research work
Defending: ,
Publication language English (en)
Title in original language Performance of a Miniature Mechanically Cooled HPGe Gamma-Spectrometer for Space Applications
Field of research 1. Natural sciences
Sub-field of research 1.3 Physical sciences
Authors Vladimir Kondratjev
Aleksandr Pchelintcev
Oļegs Jakovļevs
Aleksandr Sokolov
Vladimir Gostilo
Alan Owens
Keywords Cryocoolers; Gamma detectors (scintillators, CZT, HPG, HgI etc); Spectrometers
Abstract We report on the development of a miniaturized HPGe gamma-spectrometer for space applications. The instrument is designed around a 158 cm3 intrinsically pure Ge crystal in the closed-end coaxial configuration, cooled by a Thales RM3 miniature Stirling cycle electric cooler. To compensate the noise induced by the mechanical cooler the digital procession of the spectrometric signals with low frequency reject filter (LFR) is applied. The complete spectrometer assembly has a mass of 3.1 kg and consumes less than 10 W under working operation. The spectrometer was tested under a number of operating conditions in a specially designed chamber, which simulates the space environment. With the mechanical cooler switched off, FWHM energy resolutions of 1.5 keV and 2.2 keV were obtained at 122 keV and 1333 keV, respectively, at the nominal operating temperature of 90 K. When the cooler was switched on the energy resolutions degraded to 2.5 keV and 4 keV respectively. However, with the LFR filter switched in, the resolutions improved significantly to 1.8 keV and 2.4 keV.
DOI: 10.1088/1748-0221/13/01/T01002
Hyperlink: http://iopscience.iop.org/article/10.1088/1748-0221/13/01/T01002 
Reference Kondratjev, V., Pchelintcev, A., Jakovļevs, O., Sokolov, A., Gostilo, V., Owens, A. Performance of a Miniature Mechanically Cooled HPGe Gamma-Spectrometer for Space Applications. Journal of Instrumentation, 2018, Vol.13, January 2018, pp.1-13. e-ISSN 1748-0221. Available from: doi:10.1088/1748-0221/13/01/T01002
Additional information Citation count:
ID 27023