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Solar-Blind Diamond Detectors for Lyra, the Solar VUV Radiometer on Board Proba II

Abstract

Fabrication, packaging and experimental results on the calibration of metal-semiconductor-metal (MSM) photodetectors made on diamond are reported. LYRA (Lyman-α RAdiometer onboard PROBA-2) will use diamond detectors for the first time in space for a solar physics instrument. A set of measurement campaigns was designed to obtain the XUV-to-VIS responsivity of the devices and other characterizations. The measurements of responsivity in EUV and VUV spectral ranges (40–240 nm) have been carried out by the Physkalisch-Technische Bundesanstalt (PTB) in Germany at the electron storage ring BESSY II. The longer wavelength range from 210 to 1127 nm was measured with monochromatic light by using a Xe-lamp at IMO-IMOMEC. The diamond detectors exhibit a photoresponse which lie in the 35–65 mA/W range at 200 nm (corresponding to an external quantum efficiency of 20–40%) and indicate a visible rejection ratio (200–500 nm) higher than four orders of magnitude.

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Correspondence to A. Benmoussa.

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Benmoussa, A., Hochedez, JF., Schmutz, W.K. et al. Solar-Blind Diamond Detectors for Lyra, the Solar VUV Radiometer on Board Proba II. Exp Astron 16, 141–148 (2003). https://doi.org/10.1007/s10686-003-0035-3

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Keywords

  • diamond
  • solar-blind photodetector
  • UV detectors