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Protocol for maximising light signal of metallic magnetic calorimeters for neutrinoless double beta decay search

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Title
Protocol for maximising light signal of metallic magnetic calorimeters for neutrinoless double beta decay search
Author(s)
S Y Oh; G B Kim; H L Kim; I Kim; S R Kim; H J Lee; M K Lee; Y H Kim
Subject
low temperature detector, metallic magnetic calorimeter, light detector, neutrinoless, double beta decay
Publication Date
2017-08
Journal
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, v.30, no.8, pp.084005
Publisher
IOP PUBLISHING LTD
Abstract
We report on a systematic study for maximising the signal size of metallic magnetic calorimeters (MMCs) used for large-area light detectors operating at milli-Kelvin temperatures. These light detectors are to be used for phonon-scintillation detection using a scintillating crystal for rare event search experiments. The light detector is composed of a 2 inch wafer as an absorber for scintillation light from a crystal, and an MMC as its sensor. A systematic calculation for the expected signal size is made with different SQUID selections, Er concentrations of an MMC sensor, dimensions of the meander-shaped pick-up coil, field currents and operating temperatures. The optimisation study finds that more than five times larger signals can be achieved compared with that of a reference condition in which 90 eV root-mean-squared threshold is obtained. We also describe the inductance measurement for several MMC devices with different size of the pick-up coil to be applied for an optimal condition. This optimisation protocol is also valid for MMC applications of x-ray, alpha and beta spectroscopies. © 2017 IOP Publishing Ltd
URI
https://pr.ibs.re.kr/handle/8788114/4013
DOI
10.1088/1361-6668/aa7431
ISSN
0953-2048
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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Oh_2017_SUST_30_084005.pdfDownload

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