University of Sussex
Browse
87980.pdf (1.23 MB)

AlGaAs two by two pixel detector for electron spectroscopy in space environments

Download (1.23 MB)
journal contribution
posted on 2023-06-09, 19:37 authored by Michael WhitakerMichael Whitaker, Shifan Zhao, Grammatiki LioliouGrammatiki Lioliou, Silvia Butera, Anna BarnettAnna Barnett
A prototype monolithic 2 × 2 square pixel Al0.2Ga0.8As p+ -i-n+mesa photodiode array (each photodiode of area 200 µm by 200 µm, with a 3 µm i layer) has been investigated for its utility as a detector for direct detection electron (ß-particle) spectroscopy. Each photodiode was electrically characterised and its response to illumination from a 63Ni radioisotope ß particle source was investigated at 20 °C. The percentage of electron energy absorbed in the active layer (i layer), Eabs, of the photodiode and the spectrum expected to be detected, were calculated via Monte Carlo simulations. Comparisons between the simulated and detected 63Ni ß particle spectra are presented and demonstrate uniformity in response across the two by two pixel array. The percentage of electron energy absorbed in the active layer of the detector was at a maximum of 0.53 ± 0.04 for electrons with an energy of 38 keV; the percentage of electron energy absorbed in the active layer of the detector reduced to 0.29 ± 0.02 at 66 keV.

Funding

Radioisotope Microbatteries; G1951; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/P001815/1

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

Novel X-ray/[gamma]-ray Detectors; G2260; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/R001804/1

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ISSN

0168-9002

Publisher

Elsevier

Volume

951

Article number

a163039

Department affiliated with

  • Engineering and Design Publications

Research groups affiliated with

  • Space Research Group Publications

Notes

M.D.C.W. acknowledges funding received in the form of a PhD scholarship from University of Sussex, UK. A.M.B. acknowledges funding from the Leverhulme Trust, UK, in the form of a 2016 Philip Leverhulme Prize. The authors are grateful to B. Harrison, R. J. Airey, and S. Kumar at the EPSRC National Centre for III-V Technologies for material growth and fabrication.

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-11-12

First Open Access (FOA) Date

2020-10-27

First Compliant Deposit (FCD) Date

2019-11-11

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC