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Temperature characterisation of spectroscopic InGaP X-ray photodiodes
journal contribution
posted on 2023-06-09, 15:08 authored by Silvia Butera, Grammatiki LioliouGrammatiki Lioliou, A B Krysa, Anna BarnettAnna BarnettIn this paper for the first time, an InGaP photodiode was used in a high temperature tolerant X-ray spectrometer. The use of InGaP in X-ray spectrometers shows a significant advance within this field allowing operation up to 100 °C. Such results are particularly important since GaP and InP (the InGaP binary parent compounds) are not spectroscopic even at room temperature. The best energy resolution (smallest FWHM) at 5.9 keV for the InGaP spectrometer was 1.27 keV at 100 °C and 770 eV at 20 °C, when the detector was reverse biased at 5 V. The observed FWHM were higher than the expected statistically limited energy resolutions indicating that other sources of noise contributed to the FWHM broadening. The spectrometer’s Si preamplifier electronics was the limiting factor for the FWHM rather than the InGaP photodiode itself. The InGaP electron-hole pair creation energy (eInGaP) was experimentally measured across the temperature range 100 °C to 20 °C. eInGaP was 4.94 eV ± 0.06 eV at 20 °C.
Funding
In situ X-ray Fluorescence Spectroscopy for Deep Sea Mining Applications; G1537; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M004635/1
Radioisotope Microbatteries; G1951; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/P001815/1
History
Publication status
- Published
File Version
- Accepted version
Journal
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated EquipmentISSN
0168-9002Publisher
ElsevierExternal DOI
Volume
908Page range
277-284Department affiliated with
- Engineering and Design Publications
Research groups affiliated with
- Space Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2018-09-19First Open Access (FOA) Date
2019-08-22First Compliant Deposit (FCD) Date
2018-09-19Usage metrics
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