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Cryogenic Microcalorimeter System for Ultra-High Resolution Alpha-Particle Spectrometry.
Cryogenic Microcalorimeter System for Ultra-High Resolution Alpha-Particle Spectrometry.
- Source :
- AIP Conference Proceedings; 12/16/2009, Vol. 1185 Issue 1, p741-744, 4p
- Publication Year :
- 2009
-
Abstract
- Microcalorimeters have been shown to yield unsurpassed energy resolution for alpha spectrometry, up to 1.06 keV FWHM at 5.3 MeV. These detectors use a superconducting transition-edge sensor (TES) to measure the temperature change in an absorber from energy deposited by an interacting alpha particle. Our system has four independent detectors mounted inside a liquid nitrogen/liquid helium cryostat. An adiabatic demagnetization refrigerator (ADR) cools the detector stage to its operating temperature of 80 mK. Temperature regulation with ∼15-μK peak-to-peak variation is achieved by PID control of the ADR. The detectors are voltage-biased, and the current signal is amplified by a commercial SQUID readout system and digitized for further analysis. This paper will discuss design and operation of our microcalorimeter alpha-particle spectrometer, and will show recent results. [ABSTRACT FROM AUTHOR]
- Subjects :
- CALORIMETERS
ALPHA ray spectrometry
DETECTORS
LIQUID nitrogen
CRYOSTATS
Subjects
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 1185
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 47200561
- Full Text :
- https://doi.org/10.1063/1.3292448