Physics
Scientific paper
Feb 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..605..259o&link_type=abstract
LOW TEMPERATURE DETECTORS: Ninth International Workshop on Low Temperature Detectors. AIP Conference Proceedings, Volume 605, p
Physics
Superconducting Optical, X-Ray, And Gamma-Ray Detectors, X- And Gamma-Ray Sources, Mirrors, Gratings, And Detectors
Scientific paper
We are developing an Ir-TES x-ray microcalorimeter with high energy-resolution. First we fabricated an Ir film of 0.5 mm×0.5 mm. The measured energy resolution was 194 eV (FWHM) for 5.9 keV x-rays and this value is extremely worse than the theoretical resolution. We considered the limitation in the energy resolution arises from non-uniformity in the heat diffusion process. To improve the heat diffusion property, we have developed a new small pixel geometry that has a shorter length between electrodes and some thin slits to separate the heat diffusion area of the Ir-TES. This device has shown an improved energy resolution of 47 eV (FWHM) at 5.9 keV. Furthermore the risetime and falltime map has shown the possibility of identifying the pixel position which would be useful for an imaging TES array. .
Ataka Manabu
Fukuda Daiji
Hirayama Fuminori
Nakazawa Masaharu
Noguchi Yoshihiko
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