Performance of TES X-ray microcalorimeters with a novel absorber design

Simon R. Bandler; R. P. Brekosky; A. D. Brown; J. A. Chervenak; E. Figueroa-Feliciano; F. M. Finkbeiner; N. Iyomoto; R. L. Kelley; C. A. Kilbourne; F. S. Porter; J. Sadleir; S. J. Smith

doi:10.1007/s10909-007-9673-6

Performance of TES X-ray microcalorimeters with a novel absorber design

Simon R. Bandler^*, R. P. Brekosky, A. D. Brown, J. A. Chervenak, E. Figueroa-Feliciano, F. M. Finkbeiner, N. Iyomoto, R. L. Kelley, C. A. Kilbourne, F. S. Porter, J. Sadleir, S. J. Smith

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

Superconducting transition-edge sensor (TES) microcalorimeters have demonstrated the Constellation-X requirements for spectral resolution, speed, and pixel size in a close-packed geometry. We will present our recent breakthrough energy resolution with sensors that have all gold and bismuth-gold absorbers. This has been enabled by cantilevered absorbers that make contact to the TES only in regions that are not part of the active thermometer. With this approach, rapid thermalization of the x-ray energy is achieved and interaction between the absorber and TES sensor films is avoided. This design allows us to obtain uniform high performance and is compatible with large-format, high fill-factor arrays. We will discuss this design, the results we have achieved in 8×8 arrays of these pixels, and the dependence of the performance on the geometry of the absorber contact area and on stress within the sensor.

Original language	English (US)
Pages (from-to)	400-405
Number of pages	6
Journal	Journal of Low Temperature Physics
Volume	151
Issue number	1-2 PART 1
DOIs	https://doi.org/10.1007/s10909-007-9673-6
State	Published - Apr 2008

Keywords

Microcalorimeters
Transition edge sensors

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Materials Science(all)
Condensed Matter Physics

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Bandler, S. R., Brekosky, R. P., Brown, A. D., Chervenak, J. A., Figueroa-Feliciano, E., Finkbeiner, F. M., Iyomoto, N., Kelley, R. L., Kilbourne, C. A., Porter, F. S., Sadleir, J., & Smith, S. J. (2008). Performance of TES X-ray microcalorimeters with a novel absorber design. Journal of Low Temperature Physics, 151(1-2 PART 1), 400-405. https://doi.org/10.1007/s10909-007-9673-6

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abstract = "Superconducting transition-edge sensor (TES) microcalorimeters have demonstrated the Constellation-X requirements for spectral resolution, speed, and pixel size in a close-packed geometry. We will present our recent breakthrough energy resolution with sensors that have all gold and bismuth-gold absorbers. This has been enabled by cantilevered absorbers that make contact to the TES only in regions that are not part of the active thermometer. With this approach, rapid thermalization of the x-ray energy is achieved and interaction between the absorber and TES sensor films is avoided. This design allows us to obtain uniform high performance and is compatible with large-format, high fill-factor arrays. We will discuss this design, the results we have achieved in 8×8 arrays of these pixels, and the dependence of the performance on the geometry of the absorber contact area and on stress within the sensor.",

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doi = "10.1007/s10909-007-9673-6",

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AU - Figueroa-Feliciano, E.

AU - Finkbeiner, F. M.

AU - Iyomoto, N.

AU - Kelley, R. L.

AU - Kilbourne, C. A.

AU - Porter, F. S.

AU - Sadleir, J.

AU - Smith, S. J.

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AB - Superconducting transition-edge sensor (TES) microcalorimeters have demonstrated the Constellation-X requirements for spectral resolution, speed, and pixel size in a close-packed geometry. We will present our recent breakthrough energy resolution with sensors that have all gold and bismuth-gold absorbers. This has been enabled by cantilevered absorbers that make contact to the TES only in regions that are not part of the active thermometer. With this approach, rapid thermalization of the x-ray energy is achieved and interaction between the absorber and TES sensor films is avoided. This design allows us to obtain uniform high performance and is compatible with large-format, high fill-factor arrays. We will discuss this design, the results we have achieved in 8×8 arrays of these pixels, and the dependence of the performance on the geometry of the absorber contact area and on stress within the sensor.

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Performance of TES X-ray microcalorimeters with a novel absorber design

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Keywords

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