NDLI: Noise and signal analysis of Ir/Au TES with asymmetrical slits parallel to the electric current

Content Provider	IEEE Xplore Digital Library
Author	Fukuda, D. Takahashi, H. Kunieda, Y. Zen, N. Ohkubo, M. Nakazawa, M.
Copyright Year	2002
Abstract	A multi-pixel TES array is one of the attractive methods to read-out the incident x-ray position, which simplifies a read-out circuit for imaging applications. We fabricated a ten-pixel Ir/Au TES microcalorimeter with asymmetrical slits parallel to the electric current, and analyzed its noise and signal characteristics. The device was successfully operated in a strong electro-thermal feedback (ETF) mode. However, very large excess noise is observed, which cannot be explained by the noise theory for a single pixel TES. We have modeled the multi-pixel TES array as separated thermal group components, and analyzed noise performance theoretically. As a result, the current noise in our theory is well agreed with the measured noise at a low frequency below 3 kHz. From the x-ray irradiation measurements, ten divided signal groups are observed, which will be associated with the incident x-ray position pixel. The best energy resolution was 18 eV (FWHM) for 5.9 keV x-rays at 0.5 /spl mu/V bias voltage.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	522
Ending Page	525
Page Count	4
File Size	181351
File Format	PDF
ISSN	10518223
Volume Number	15
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal analysis Gold Low-frequency noise Circuit noise X-ray imaging Optical imaging Feedback Performance analysis Current measurement Frequency measurement radiation detectors Excess noise imaging low temperature detectors position sensitive detectors precise energy measurement
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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