Other
Scientific paper
Feb 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..605...67f&link_type=abstract
LOW TEMPERATURE DETECTORS: Ninth International Workshop on Low Temperature Detectors. AIP Conference Proceedings, Volume 605, p
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4
Thermoelectromagnetic And Other Devices, X- And Gamma-Ray Sources, Mirrors, Gratings, And Detectors
Scientific paper
In the last few years, it has been shown that x-ray detectors based on the concept of magnetic calorimetry are well suited for high resolution energy dispersive spectroscopy. With prototype detectors, an energy resolution of 12 eV for 6 keV x-rays has been achieved. As the experimental conditions have not been optimized yet, neither with respect to external noise sources nor to internal noise sources, substantial improvements are possible. We discuss the most prominent noise sources of metallic magnetic calorimeters (MMC). We show that thermodynamic fluctuations between absorber and thermometer are the most likely candidate to set a fundamental limitation of energy resolution for this type of detector. The degradation of resolution due to preamplifier (SQUID) noise is marginal. To illustrate the results we discuss a MMC x-ray detector having a absorber heat capacity of 1 pJ/K, 1μs rise time, and 1 ms thermal decay time for which an energy resolution of ΔEFWHM~=1.5 eV is predicted. .
Daniyarov T.
Enss Christian
Fleischmann Andreas
Seidel George M.
Weis Robert
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