Small thermal calorimeters operated at temperatures near 100 mK are sufficiently sensitive to detect single photons, measuring the deposited energy to accuracies approaching 1 eV. A test device has demonstrated 17‐eV FWHM for 6‐keV x‐rays—almost an order of magnitude better than a conventional Si(Li) solid state detector. Further improvement requires the development of monolithic fabrication techniques to reduce the parasitic heat capacities introduced in assembling a discrete device. Current technology should permit the construction of a detector about 1/2 mm2 with good efficiency for 35‐keV x‐rays and a resolution near 25 eV. The ultimate resolution achievable in practice and the tradeoff of collecting energy for resolution depend primarily on the low‐temperature specific heat of the material used to absorb the x‐rays and efficiently thermalize their energy. Finding the optimum absorber is particularly important at higher photon energies. We are studying absorbers that may offer considerably improved performance.
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July 1989
INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION
29 AUG − 2 SEP 1988
TSUKABA (JAPAN)
Research Article|
July 01 1989
High resolution microcalorimeters as detectors for inelastic scattering (invited)
A. Szymkowiak;
A. Szymkowiak
Code 666, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
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R. Kelley;
R. Kelley
Code 666, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
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G. Madejski;
G. Madejski
Code 666, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
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H. Moseley;
H. Moseley
Code 666, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
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R. Schoelkopf;
R. Schoelkopf
Code 666, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
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B. Edwards;
B. Edwards
Physics Department, University of Wisconsin, Madison, Wisconsin 53706
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M. Juda;
M. Juda
Physics Department, University of Wisconsin, Madison, Wisconsin 53706
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D. McCammon;
D. McCammon
Physics Department, University of Wisconsin, Madison, Wisconsin 53706
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M. Skinner;
M. Skinner
Physics Department, University of Wisconsin, Madison, Wisconsin 53706
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J. Zhang
J. Zhang
Physics Department, University of Wisconsin, Madison, Wisconsin 53706
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A. Szymkowiak
R. Kelley
G. Madejski
H. Moseley
R. Schoelkopf
B. Edwards
M. Juda
D. McCammon
M. Skinner
J. Zhang
Code 666, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
Rev. Sci. Instrum. 60, 1557–1560 (1989)
Citation
A. Szymkowiak, R. Kelley, G. Madejski, H. Moseley, R. Schoelkopf, B. Edwards, M. Juda, D. McCammon, M. Skinner, J. Zhang; High resolution microcalorimeters as detectors for inelastic scattering (invited). Rev. Sci. Instrum. 1 July 1989; 60 (7): 1557–1560. https://doi.org/10.1063/1.1141034
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