Effects of Stray Magnetic Field on Transition-Edge Sensors in Gamma-Ray Microcalorimeters

被引：0

作者：

Keller, Mark W. ^{[1
]}

Wessels, A. L. ^{[1
]}

Becker, D. T. ^{[2
]}

Bennett, D. A. ^{[1
]}

Carpenter, M. H. ^{[3
]}

Croce, M. P. ^{[3
]}

Gard, J. D. ^{[2
]}

Imrek, J. ^{[4
]}

Mates, J. A. B. ^{[1
]}

Morgan, K. M. ^{[2
]}

Ortiz, N. J. ^{[1
]}

Schmidt, D. R. ^{[1
]}

Schreiber, K. A. ^{[3
]}

Swetz, D. S. ^{[1
]}

Ullom, J. N. ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Quantum Sensors Div, 325 Broadway, Boulder, CO 80305 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Theiss Res, La Jolla, CA 92037 USA

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2024年 / 216卷 / 1-2期

关键词：

Transition-edge sensor; Gamma-ray spectrometer; Magnetic shielding; Flux trapping;

D O I：

10.1007/s10909-024-03140-y

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Superconducting transition-edge sensors (TESs) used in X-ray and gamma \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\gamma$$\end{document} -ray microcalorimeters suffer degraded performance if cooled in a magnetic field B sufficient to trap flux in the sensors. We report measurements of gamma \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\gamma$$\end{document} -ray TESs before and after implementing measures to reduce stray B fields from sources inside and outside the cryostat. These measurements showed a correlation between anomalous features in TES current-voltage (IV) curves and degraded energy resolution. After reducing internal sources of stray B field and improving shielding against external sources, both IV curves and energy resolution improved. Finally, we placed magnetized screws with remnant fields similar to \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sim$$\end{document} 10 mu T \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\upmu \textrm{T}$$\end{document} near similar gamma \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\gamma$$\end{document} -ray TESs in a different type of detector package and observed the same effects.

引用

页码：336 / 343

页数：8

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