The Noise and Energy Resolution of the Ti/Au Bilayer X-ray TES Calorimeter with an Au Absorber
We fabricated the TES microcalorimeter with TES(Ti/Au) and gold absorber, and obtained FWHM energy resolution of 4.8±0.3 eV at 5.9 keV. The baseline resolution, i.e. the resolution determined by noise, was 4.1±0.1 eV. From the noise spectra we found that the square of the baseline resolution could b...
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Published in | Journal of low temperature physics Vol. 151; no. 1-2; pp. 185 - 189 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Boston
Springer US
01.04.2008
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Subjects | |
Online Access | Get full text |
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Summary: | We fabricated the TES microcalorimeter with TES(Ti/Au) and gold absorber, and obtained FWHM energy resolution of 4.8±0.3 eV at 5.9 keV. The baseline resolution, i.e. the resolution determined by noise, was 4.1±0.1 eV. From the noise spectra we found that the square of the baseline resolution could be approximately decomposed into contributions of three noise components. They are estimated to be (2.5 eV)
2
(the intrinsic noise), (1.5 eV)
2
(the readout noise), and (3.0 eV)
2
(so-called excess noise). There is additional broadening of (2.5 eV)
2
from the baseline resolution. The excess noise is the largest limiting factor of the energy resolution of the device. |
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Bibliography: | SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3 |
ISSN: | 0022-2291 1573-7357 |
DOI: | 10.1007/s10909-007-9617-1 |