TY - JOUR
T1 - Evaluation of 256-pixel TES microcalorimeter arrays with electrodeposited Bi absorbers
AU - Morita, U.
AU - Yamakawa, Y.
AU - Fujimori, T.
AU - Ishisaki, Y.
AU - Ohashi, T.
AU - Takei, Y.
AU - Yoshida, K.
AU - Yoshino, T.
AU - Mitsuda, K.
AU - Yamasaki, N. Y.
AU - Fujimoto, R.
AU - Sato, H.
AU - Minoura, Y.
AU - Takahashi, N.
AU - Homma, T.
AU - Shoji, S.
AU - Kuroda, Y.
AU - Onishi, M.
N1 - Funding Information:
This research was partially supported by a Research Fellowship for Young Scientists from JSPS, and the Ministry of Education, Culture, Sports, Science and Technology of Japan, Grants-in-Aid for Scientific Research 16340077.
PY - 2006/4/14
Y1 - 2006/4/14
N2 - We succeeded in fabricating 256-pixel arrays of Ti/Au transition edge sensor (TES) microcalorimeters with electrodeposited microabsorbers made of Bi, and report on their test results. We confirmed all pixels tested so far were alive, however most of the microabsorbers were stripped off during cooling cycles. We investigated some pixels by irradiating with 5.9 keV X-rays, and confirmed that they actually worked as microcalorimeters. The X-ray pulses are represented by a sum of two components with different decay times. The ratio of the two components fluctuates from pulse to pulse, which limits the energy resolution to ∼ 200 eV. We discuss the pulse shape of two decay-time components considering thermal conductivities, i.e., inside microabsorbers, between microabsorbers and TES.
AB - We succeeded in fabricating 256-pixel arrays of Ti/Au transition edge sensor (TES) microcalorimeters with electrodeposited microabsorbers made of Bi, and report on their test results. We confirmed all pixels tested so far were alive, however most of the microabsorbers were stripped off during cooling cycles. We investigated some pixels by irradiating with 5.9 keV X-rays, and confirmed that they actually worked as microcalorimeters. The X-ray pulses are represented by a sum of two components with different decay times. The ratio of the two components fluctuates from pulse to pulse, which limits the energy resolution to ∼ 200 eV. We discuss the pulse shape of two decay-time components considering thermal conductivities, i.e., inside microabsorbers, between microabsorbers and TES.
KW - Microabsorber
KW - Superconducting transition edge sensor
KW - X-ray detectors
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U2 - 10.1016/j.nima.2005.12.064
DO - 10.1016/j.nima.2005.12.064
M3 - Article
AN - SCOPUS:33645889965
SN - 0168-9002
VL - 559
SP - 539
EP - 541
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 2
ER -