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- Title
The Design and Characterization of Dielectric Microcalorimeters for X-ray Photon Detection.
- Authors
Kikuchi, T.; Hoshino, M.; Nakayama, T.; Yamasaki, N.; Maehata, K.; Mitsuda, K.
- Abstract
The dielectric micro calorimeter (DMC) is a novel radiation detector utilizing a GHz resonator with dielectric thermometer (Sekiya et al. in J Low Temp Phys 167:435, ). The advantage of using a DMC is that the detection mechanism is based on a phonon mediation without Johnson noise and quasi-particle decay process. A large format array of DMCs can be easily multiplexed by a resonator circuit in the readout at GHz band width. We describe the design of a DMC as an X-ray photon counter. It is optimized to detect photon at 5.9 keV energy. We consider $$^{18}$$ O-doped SrTiO $$_3$$ (STO18) and Nb-doped KTa $$_{(1-x)}$$ Nb $$_{x}$$ O $$_{3}$$ (KTN) as a candidate of dielectric thermometer. Dielectric materials which have sensitivity $$\alpha $$ (= d $$\log {C_{\mathrm {el}}}/d\log {T}$$ ) are also ideal for our application. We check that both STO18 and KTN have $$\alpha {\sim } 10^{3}$$ at 100 mK. If we assume a DMC resonator operating at 100 mK, we need a Q value of a resonator to be 2000 for X-ray detection.
- Subjects
CALORIMETERS; X-ray detection; PHOTON detectors; NUCLEAR counters; THERMOMETERS; THERMAL noise; DIELECTRIC materials
- Publication
Journal of Low Temperature Physics, 2016, Vol 184, Issue 1/2, p250
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-016-1587-8