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Temperature study of Al0.52In0.48P detector photon counting X-ray spectrometer

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posted on 2023-06-09, 03:53 authored by Silvia Butera, T Gohil, Grammatiki LioliouGrammatiki Lioliou, A B Krysa, Anna BarnettAnna Barnett
A prototype 200 µm diameter Al0.52In0.48P p+-i-n+ mesa photodiode (2 µm i-layer) was characterised at temperatures from 100 °C to -20 °C for the development of a temperature tolerant photon counting X-ray spectrometer. At each temperature, X-ray spectra were accumulated with the AlInP detector reverse biased at 0 V, 5 V, 10 V and 15 V and using different shaping times. The detector was illuminated by an 55Fe radioisotope X-ray source. The best energy resolution, as quantified by the full width at half maximum (FWHM) at 5.9 keV, was observed at 15 V for all the temperatures studied; at 100 °C a FWHM of 1.57 keV was achieved, this value improved to 770 eV FWHM at -20 °C. System noise analysis was also carried out and the different noise contributions were computed as functions of temperature. The results are the first demonstration of AlInP’s suitability for photon counting X-ray spectroscopy at temperatures other than ˜ 20 °C.

Funding

High Efficiency Betavoltaic Cells; G1455; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M002772/1

In situ X-ray Fluorescence Spectroscopy for Deep Sea Mining Applications; G1537; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M004635/1

RS130515; Royal Society

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Journal of Applied Physics

ISSN

0021-8979

Publisher

AIP Publishing

Volume

120

Page range

174503

Department affiliated with

  • Engineering and Design Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-11-07

First Open Access (FOA) Date

2016-11-07

First Compliant Deposit (FCD) Date

2016-11-07

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