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

Butera, S, Gohil, T, Lioliou, G, Krysa, A B and Barnett, A M (2016) Temperature study of Al0.52In0.48P detector photon counting X-ray spectrometer. Journal of Applied Physics, 120. p. 174503. ISSN 0021-8979

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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.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QC Physics
Depositing User: Silvia Butera
Date Deposited: 07 Nov 2016 12:11
Last Modified: 07 Mar 2017 04:39
URI: http://srodev.sussex.ac.uk/id/eprint/65270

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Project NameSussex Project NumberFunderFunder Ref
In situ X-ray Fluorescence Spectroscopy for Deep Sea Mining ApplicationsG1537STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/M004635/1
UnsetRS130515Royal SocietyUnset