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An MMC-Based Temperature Control System for a Long-Term Data Collection

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Title
An MMC-Based Temperature Control System for a Long-Term Data Collection
Author(s)
Kyungrae Woo; Han Beom Kim; Hyelim Kim; Yong Hamb Kim; Do Hyung Kwon; Dong Yeup Lee; Hye Jin Lee; Sunghoon Lee; Yong Chang Lee; Ho Seong Lim
Publication Date
2022-12
Journal
JOURNAL OF LOW TEMPERATURE PHYSICS, v.209, no.5-6, pp.1218 - 1225
Publisher
SPRINGER/PLENUM PUBLISHERS
Abstract
We developed a two-stage temperature control system for a long-term stable measurement of AMoRE neutrinoless double beta decay experiment using a dilution refrigerator. The first-stage control was made with a standard PID system using an AC bridge with a ruthenium oxide thermometer as the main thermometer of the mixing chamber plate. The second-stage control was obtained with a magnetic microcalorimeter (MMC) that is configured as a sensitive thermometer for a detector tower, the main experiment. Under single-stage temperature control on the temperature of the mixing chamber plate only with the RuO2 thermometer, the MMC recorded temperature stability of the detector plate of 9 mu K rms over 100 min. Under two-stage temperature control, with the first-stage of the mixing chamber plate at 11 mK via the RuO2 thermometer and the second-stage of the detector plate at 12 mK via the MMC, the MMC recorded a temperature stability of 0.5 mu K rms over 100 min. Moreover, the heat channels of the AMoRE experiment obtained considerable improvement in energy resolutions when switching from single-stage (RuO2) to two-stage (RuO2 + MMC) control.
URI
https://pr.ibs.re.kr/handle/8788114/12507
DOI
10.1007/s10909-022-02805-w
ISSN
0022-2291
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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