Gamma-ray spectrometers using superconducting transition edge sensors with external active feedback bias

We are developing X-ray and gamma-ray spectrometers with high absorption efficiency and high energy-resolution for X-ray and gamma-ray spectroscopy. They are microcalorimeters consisting of a bulk Sn absorber coupled to a Mo/Cu multilayer superconducting transition edge sensor (TES). We have operate...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2001-03, Vol.11 (1), p.743-746
Main Authors: Chow, D.T., van den Berg, M.L., Loshak, A., Frank, M., Barbee, T.W., Labov, S.E.
Format: Article
Language:English
Subjects:
Degradation
Detectors
Electromagnetic wave absorption
Energy measurement
Energy resolution
Exact sciences and technology
Feedback
Gamma ray detection
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Nonhomogeneous media
Physics
Spectroscopy
Tin
X- and γ-ray instruments and techniques
X- and γ-ray spectrometers
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Summary:We are developing X-ray and gamma-ray spectrometers with high absorption efficiency and high energy-resolution for X-ray and gamma-ray spectroscopy. They are microcalorimeters consisting of a bulk Sn absorber coupled to a Mo/Cu multilayer superconducting transition edge sensor (TES). We have operated these microcalorimeters with an external active feedback bias to linearize the detector response, improve the count rate performance, and extend the detection energy range. We measured an energy resolution of 120 eV FWHM for 60 keV incident gamma-rays with no degradation of resolution from active bias. We present X-ray and gamma-ray results and operation of this detector design in both bias modes.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.919452