Soft X-ray detection and photon counting spectroscopy with commercial 4H-SiC Schottky photodiodes

Zhao, S, Gohil, T, Lioliou, G and Barnett, A M (2016) Soft X-ray detection and photon counting spectroscopy with commercial 4H-SiC Schottky photodiodes. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 830. pp. 1-5. ISSN 0168-9002

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The results of electrical characterisation and X-ray detection measurements of two different active area (0.06 mm2 and 0.5 mm2) commercial 4H-SiC Schottky photodiodes at room temperature are reported. The devices exhibited low dark currents (less than 10 pA) even at a high electric field strengths (403 kV/cm for 0.06 mm2 diodes; 227 kV/cm for 0.5 mm2 diodes). The results of the X-ray measurements indicate that the diodes can be used as photon counting spectroscopic X-ray detectors with modest energy resolutions: FWHM at 5.9 keV of 1.8 keV and 3.3 keV, for the 0.06 mm2 and 0.5 mm2 devices, respectively. Noise analysis of the photodiodes coupled to a custom low noise charge sensitive preamplifier is also presented.

Item Type: Article
Keywords: X-ray detector, Photodiode, Silicon carbide, COTS, Commercial off the shelf
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Depositing User: Shifan Zhao
Date Deposited: 25 May 2016 10:22
Last Modified: 06 Mar 2017 08:35

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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
UnsetUnsetRoyal SocietyRG130515