Performance of new generation swept charge devices for lunar x-ray spectroscopy on Chandrayaan-2

P. H. Smith; J. P. D. Gow; N. J. Murray; A. D. Holland; M. Anand; P. Pool; P. Sreekumar; S. Narendranath

doi:10.1117/12.926213

25 September 2012 Performance of new generation swept charge devices for lunar x-ray spectroscopy on Chandrayaan-2

P. H. Smith, J. P. D. Gow, N. J. Murray, A. D. Holland, M. Anand, P. Pool, P. Sreekumar, S. Narendranath

Proceedings Volume 8453, High Energy, Optical, and Infrared Detectors for Astronomy V; 84530R (2012) https://doi.org/10.1117/12.926213
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The Chandrayaan-2 Large Area Soft X-ray spectrometer (CLASS) is due to be launched by the Indian Space Research Organisation (ISRO) in 2014. It will map the elemental composition of the lunar surface, building on the Chandrayaan-1 X-ray spectrometer (C1XS) heritage. CLASS will use an array of e2v technologies CCD236 swept charge devices (SCD) providing an active detector area of approximately 64 cm², almost three times the active area of C1XS which used the first generation of SCD, the CCD54. The CCD236 is designed as a soft X-ray detector, 0.8 keV to 10 keV, and benefits from improvements in design to allow for increased detector area, a reduction in split X-ray events and improvements to radiation hardness. This paper describes the investigation into the performance requirements of the CCD236, focussing on an optimisation of the energy resolution of a device irradiated to the estimated worse case end of life proton fluence.

Citation Download Citation

P. H. Smith, J. P. D. Gow, N. J. Murray, A. D. Holland, M. Anand, P. Pool, P. Sreekumar, and S. Narendranath "Performance of new generation swept charge devices for lunar x-ray spectroscopy on Chandrayaan-2", Proc. SPIE 8453, High Energy, Optical, and Infrared Detectors for Astronomy V, 84530R (25 September 2012); https://doi.org/10.1117/12.926213

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