Optimized TES Microcalorimeters with 14 eV Energy Resolution at 30 keV for γ-Ray Measurements of the 229Th Isomer

H. Muramatsu; T. Hayashi; N. Yuasa; R. Konno; A. Yamaguchi; K. Mitsuda; N. Y. Yamasaki; K. Maehata; H. Kikunaga; M. Takimoto; K. Nakamura

doi:10.1007/s10909-020-02458-7

Optimized TES Microcalorimeters with 14 eV Energy Resolution at 30 keV for γ-Ray Measurements of the ²²⁹Th Isomer

H. Muramatsu, T. Hayashi, N. Yuasa, R. Konno, A. Yamaguchi, K. Mitsuda, N. Y. Yamasaki, K. Maehata, H. Kikunaga, M. Takimoto, K. Nakamura

Research Center for Electron Photon Science (ELPH)

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We have developed a four-pixel array of superconducting transition-edge sensors with gold absorbers for the detection of a 29.2 keV γ-ray doublet decay from ²²⁹Th. To identify the decay, an energy resolution better than 20 eV full width at half maximum (FWHM) is needed. We measured an energy resolution of 14 eV FWHM for 26 keV γ-ray decay from an ²⁴¹Am isotope in combined data of three pixels. We describe the design and the performance of the devices and discuss the baseline correction method to compensate the variation in the baseline, which was observed during the evaluation of the performance using the ²⁴¹Am isotope.

Original language	English
Pages (from-to)	452-460
Number of pages	9
Journal	Journal of Low Temperature Physics
Volume	200
Issue number	5-6
DOIs	https://doi.org/10.1007/s10909-020-02458-7
Publication status	Published - 2020 Sept 1

Keywords

Microcalorimeter
TES
γ-Ray measurement

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10.1007/s10909-020-02458-7

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Muramatsu, H., Hayashi, T., Yuasa, N., Konno, R., Yamaguchi, A., Mitsuda, K., Yamasaki, N. Y., Maehata, K., Kikunaga, H., Takimoto, M., & Nakamura, K. (2020). Optimized TES Microcalorimeters with 14 eV Energy Resolution at 30 keV for γ-Ray Measurements of the ²²⁹Th Isomer. Journal of Low Temperature Physics, 200(5-6), 452-460. https://doi.org/10.1007/s10909-020-02458-7

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title = "Optimized TES Microcalorimeters with 14 eV Energy Resolution at 30 keV for γ-Ray Measurements of the 229Th Isomer",

abstract = "We have developed a four-pixel array of superconducting transition-edge sensors with gold absorbers for the detection of a 29.2 keV γ-ray doublet decay from 229Th. To identify the decay, an energy resolution better than 20 eV full width at half maximum (FWHM) is needed. We measured an energy resolution of 14 eV FWHM for 26 keV γ-ray decay from an 241Am isotope in combined data of three pixels. We describe the design and the performance of the devices and discuss the baseline correction method to compensate the variation in the baseline, which was observed during the evaluation of the performance using the 241Am isotope.",

keywords = "Microcalorimeter, TES, γ-Ray measurement",

author = "H. Muramatsu and T. Hayashi and N. Yuasa and R. Konno and A. Yamaguchi and K. Mitsuda and Yamasaki, {N. Y.} and K. Maehata and H. Kikunaga and M. Takimoto and K. Nakamura",

note = "Funding Information: This work was supported by JSPS Grant-in-Aid for Scientific Research (B) Grant No. JP18H01241 and (A) Grant No. JP19H00685. H. Muramatsu is partially supported by JSPS Grant-in-Aid for JSPS Fellows Grant No. JP17J07990. Publisher Copyright: {\textcopyright} 2020, Springer Science+Business Media, LLC, part of Springer Nature.",

year = "2020",

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doi = "10.1007/s10909-020-02458-7",

language = "English",

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Muramatsu, H, Hayashi, T, Yuasa, N, Konno, R, Yamaguchi, A, Mitsuda, K, Yamasaki, NY, Maehata, K, Kikunaga, H, Takimoto, M & Nakamura, K 2020, 'Optimized TES Microcalorimeters with 14 eV Energy Resolution at 30 keV for γ-Ray Measurements of the ²²⁹Th Isomer', Journal of Low Temperature Physics, vol. 200, no. 5-6, pp. 452-460. https://doi.org/10.1007/s10909-020-02458-7

TY - JOUR

T1 - Optimized TES Microcalorimeters with 14 eV Energy Resolution at 30 keV for γ-Ray Measurements of the 229Th Isomer

AU - Muramatsu, H.

AU - Hayashi, T.

AU - Yuasa, N.

AU - Konno, R.

AU - Yamaguchi, A.

AU - Mitsuda, K.

AU - Yamasaki, N. Y.

AU - Maehata, K.

AU - Kikunaga, H.

AU - Takimoto, M.

AU - Nakamura, K.

N1 - Funding Information: This work was supported by JSPS Grant-in-Aid for Scientific Research (B) Grant No. JP18H01241 and (A) Grant No. JP19H00685. H. Muramatsu is partially supported by JSPS Grant-in-Aid for JSPS Fellows Grant No. JP17J07990. Publisher Copyright: © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

PY - 2020/9/1

Y1 - 2020/9/1

N2 - We have developed a four-pixel array of superconducting transition-edge sensors with gold absorbers for the detection of a 29.2 keV γ-ray doublet decay from 229Th. To identify the decay, an energy resolution better than 20 eV full width at half maximum (FWHM) is needed. We measured an energy resolution of 14 eV FWHM for 26 keV γ-ray decay from an 241Am isotope in combined data of three pixels. We describe the design and the performance of the devices and discuss the baseline correction method to compensate the variation in the baseline, which was observed during the evaluation of the performance using the 241Am isotope.

AB - We have developed a four-pixel array of superconducting transition-edge sensors with gold absorbers for the detection of a 29.2 keV γ-ray doublet decay from 229Th. To identify the decay, an energy resolution better than 20 eV full width at half maximum (FWHM) is needed. We measured an energy resolution of 14 eV FWHM for 26 keV γ-ray decay from an 241Am isotope in combined data of three pixels. We describe the design and the performance of the devices and discuss the baseline correction method to compensate the variation in the baseline, which was observed during the evaluation of the performance using the 241Am isotope.

KW - Microcalorimeter

KW - TES

KW - γ-Ray measurement

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JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

IS - 5-6

ER -

Optimized TES Microcalorimeters with 14 eV Energy Resolution at 30 keV for γ-Ray Measurements of the ²²⁹Th Isomer

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