Current dependence of performance of TES microcalorimeters and characteristics of excess noise

Y. Takei, R. Fujimoto, Y. Ishisaki, U. Morita, K. Tanaka, T. Koga, K. Mitsuda, T. Ohashi, N. Y. Yamasaki, N. Iyomoto, T. Ichitsubo, K. Sato, T. Fujimori, T. Oshima, K. Futamoto, K. Shinozaki, T. Morooka, S. Nakayama, Kenji Yoshida, N. Takai & 1 others K. Chinone

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We are developing transition edge sensor (TES) microcalorimeter arrays for future Japanese astronomy missions. Although 6.6 eV energy resolution for 5.9 keV and 74 μs decay time are achieved, our energy resolution was limited by the excess noise of unknown origin. The dominant noise showed 1/R dependence and it only appeared when the current through the TES, I, is larger than 10 μA. This is explained if we assume a constant voltage noise source with a level of ∼2(4kTCRn)1/2. We also investigated the influence of I on the TES performance and found the TES sensitivity α is reduced when the ratio of current to the critical current I/IC is large. It can explain the reduction of α observed when operated without a magnetic shield. We also found a strong correlation between IC and α or the baseline width. Thus, we conclude that IC is an essential parameter for the TES performance.

Original languageEnglish
Pages (from-to)340-343
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume520
Issue number1-3
DOIs
Publication statusPublished - 2004 Mar 11
Externally publishedYes

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calorimeters
sensors
Sensors
Astronomy
Critical currents
Sensor arrays
astronomy
critical current
Electric potential
energy
sensitivity
electric potential
decay

Keywords

  • Microcalorimeter
  • Transition-edge sensor (TES)
  • X-rays

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Current dependence of performance of TES microcalorimeters and characteristics of excess noise. / Takei, Y.; Fujimoto, R.; Ishisaki, Y.; Morita, U.; Tanaka, K.; Koga, T.; Mitsuda, K.; Ohashi, T.; Yamasaki, N. Y.; Iyomoto, N.; Ichitsubo, T.; Sato, K.; Fujimori, T.; Oshima, T.; Futamoto, K.; Shinozaki, K.; Morooka, T.; Nakayama, S.; Yoshida, Kenji; Takai, N.; Chinone, K.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 520, No. 1-3, 11.03.2004, p. 340-343.

Research output: Contribution to journalArticle

Takei, Y, Fujimoto, R, Ishisaki, Y, Morita, U, Tanaka, K, Koga, T, Mitsuda, K, Ohashi, T, Yamasaki, NY, Iyomoto, N, Ichitsubo, T, Sato, K, Fujimori, T, Oshima, T, Futamoto, K, Shinozaki, K, Morooka, T, Nakayama, S, Yoshida, K, Takai, N & Chinone, K 2004, 'Current dependence of performance of TES microcalorimeters and characteristics of excess noise', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 520, no. 1-3, pp. 340-343. https://doi.org/10.1016/j.nima.2003.11.262
Takei, Y. ; Fujimoto, R. ; Ishisaki, Y. ; Morita, U. ; Tanaka, K. ; Koga, T. ; Mitsuda, K. ; Ohashi, T. ; Yamasaki, N. Y. ; Iyomoto, N. ; Ichitsubo, T. ; Sato, K. ; Fujimori, T. ; Oshima, T. ; Futamoto, K. ; Shinozaki, K. ; Morooka, T. ; Nakayama, S. ; Yoshida, Kenji ; Takai, N. ; Chinone, K. / Current dependence of performance of TES microcalorimeters and characteristics of excess noise. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2004 ; Vol. 520, No. 1-3. pp. 340-343.
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AU - Fujimoto, R.

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AU - Tanaka, K.

AU - Koga, T.

AU - Mitsuda, K.

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AU - Yamasaki, N. Y.

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AU - Ichitsubo, T.

AU - Sato, K.

AU - Fujimori, T.

AU - Oshima, T.

AU - Futamoto, K.

AU - Shinozaki, K.

AU - Morooka, T.

AU - Nakayama, S.

AU - Yoshida, Kenji

AU - Takai, N.

AU - Chinone, K.

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AB - We are developing transition edge sensor (TES) microcalorimeter arrays for future Japanese astronomy missions. Although 6.6 eV energy resolution for 5.9 keV and 74 μs decay time are achieved, our energy resolution was limited by the excess noise of unknown origin. The dominant noise showed 1/R dependence and it only appeared when the current through the TES, I, is larger than 10 μA. This is explained if we assume a constant voltage noise source with a level of ∼2(4kTCRn)1/2. We also investigated the influence of I on the TES performance and found the TES sensitivity α is reduced when the ratio of current to the critical current I/IC is large. It can explain the reduction of α observed when operated without a magnetic shield. We also found a strong correlation between IC and α or the baseline width. Thus, we conclude that IC is an essential parameter for the TES performance.

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