The grazing incidence detectors for the SOHO coronal diagnostic spectrometer

Details The grazing incidence detectors for the SOHO coronal diagnostic spectrometer The grazing incidence detectors for the SOHO coronal diagnostic spectrometer

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.356..237b&link_type=abstract

In ESA, Proceedings of an ESA Symposium on Photon Detectors for Space Instrumentation p 237-241 (SEE N94-15025 03-19)

Computer Science

Performance

2

Grazing Incidence, Soho Mission, Solar Corona, Solar Spectrometers, Ultraviolet Detectors, Design Analysis, Electrical Engineering, Microchannel Plates, Performance Tests, Spacecraft Instruments

Scientific paper

The Grazing Incidence Spectrometer (GIS) forms part of the Coronal Diagnostic Spectrometer (CDS) on SOHO (Solar and Heliospheric Observatory). Ultraviolet light is focused onto a Rowland circle, where four detectors image the spectra of chosen wavelength ranges, between 15 and 80 nm. Since the detectors are tangential to the circle, the incoming light meets the surfaces at grazing incidence. The detector design is a microchannel plate 'z-stack', backed by a SPAN anode, position sensitive in one dimension. The detectors are required to work at a high speed (100,000 counts/sec) and to have a resolution of better than 47 micrometers over the 50 mm length. The design, construction and performance testing of the GIS detectors and associated electronics are examined in the context of the resolution and throughout requirements. The special requirements needed for a space application and for running an anode at high voltage are described.

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