Calibration and Testing of Small High-Resolution Transition Edge Sensor Microcalorimeters with Optical Photons.

Autor:	Jaeckel FT; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., Ambarish CV; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., Dai H; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., Liu S; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., McCammon D; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., McPheron M; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., Nelms KL; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., Roy A; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., Stueber HR; Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 USA., Bandler SR; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA., Chervenak JA; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA., Sakai K; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA., Smith SJ; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
Jazyk:	angličtina
Zdroj:	IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee [IEEE Trans Appl Supercond] 2021 Jan 21; Vol. 1, pp. 1.
DOI:	10.1109/tasc.2021.3053506
Abstrakt:	Pulses of narrow line-width optical photons can be used to calibrate and test sub-2 eV full-width at halfmaximum (FWHM) energy resolution transition-edge sensor (TES) microcalorimeters at low energies (< 1 keV), where it is very challenging to obtain X-ray calibration lines comparable to (or narrower than) the detector resolution. This scheme depends on the ability to resolve the number of 3 eV photons in each pulse, which we have recently demonstrated up to photon numbers of about 300. At LTD-18 we showed preliminary results obtained with this technique on a 0.25 eV baseline resolution TES microcalorimeter designed for the ultra-high-resolution subarray of the Lynx mission. The line-shape was well described by a simple Gaussian. However, the difficulty of delivering photons to the small 46 μ m square absorbers resulted in a large thermal crosstalk signal, whose random nature is expected to rapidly degrade the observed energy resolution towards higher photon numbers/energies. We have since improved the coupling between the optical fiber and the TES absorber and report here our current results.
Databáze:	MEDLINE
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