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Cryogenic Microcalorimeter System for Ultra-High Resolution Alpha-Particle Spectrometry.

Cryogenic Microcalorimeter System for Ultra-High Resolution Alpha-Particle Spectrometry.

Authors :
Croce, M. P.
Bacrania, M. K.
Hoover, A. S.
Rabin, M. W.
Hoteling, N. J.
LaMont, S. P.
Plionis, A. A.
Dry, D. E.
Ullom, J. N.
Bennett, D. A.
Horansky, R. D.
Kotsubo, V.
Cantor, R.
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]

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