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Alpert BK, Horansky RD, Bennett DA, et al. Note: Operation of gamma-ray microcalorimeters at elevated count rates using filters with constraints. Rev Sci Instrum. 2013;84(5):056107doi: 10.1063/1.4806802.
Alpert, B. K., Horansky, R. D., Bennett, D. A., Doriese, W. B., Fowler, J. W., Hoover, A. S., Rabin, M. W., & Ullom, J. N. (2013). Note: Operation of gamma-ray microcalorimeters at elevated count rates using filters with constraints. The Review of scientific instruments, 84(5), 056107. https://doi.org/10.1063/1.4806802
Alpert, B K, et al. "Note: Operation of gamma-ray microcalorimeters at elevated count rates using filters with constraints." The Review of scientific instruments vol. 84,5 (2013): 056107. doi: https://doi.org/10.1063/1.4806802
Alpert BK, Horansky RD, Bennett DA, Doriese WB, Fowler JW, Hoover AS, Rabin MW, Ullom JN. Note: Operation of gamma-ray microcalorimeters at elevated count rates using filters with constraints. Rev Sci Instrum. 2013 May;84(5):056107. doi: 10.1063/1.4806802. PMID: 23742605.
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Rev Sci Instrum. 2013 May;84(5):056107. doi: 10.1063/1.4806802.

Note: Operation of gamma-ray microcalorimeters at elevated count rates using filters with constraints.

The Review of scientific instruments

B K Alpert, R D Horansky, D A Bennett, W B Doriese, J W Fowler, A S Hoover, M W Rabin, J N Ullom

Affiliations

  1. National Institute of Standards and Technology, Boulder, Colorado 80305, USA.

PMID: 23742605 DOI: 10.1063/1.4806802

Abstract

Microcalorimeter sensors operated near 0.1 K can measure the energy of individual x- and gamma-ray photons with significantly more precision than conventional semiconductor technologies. Both microcalorimeter arrays and higher per pixel count rates are desirable to increase the total throughput of spectrometers based on these devices. The millisecond recovery time of gamma-ray microcalorimeters and the resulting pulse pileup are significant obstacles to high per pixel count rates. Here, we demonstrate operation of a microcalorimeter detector at elevated count rates by use of convolution filters designed to be orthogonal to the exponential tail of a preceding pulse. These filters allow operation at 50% higher count rates than conventional filters while largely preserving sensor energy resolution.

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