EUV Astronomical Spectroscopy With CCD Detectors

R. A. Stern; R. C. Catura; M. M. Blouke; M. Winzenread

doi:10.1117/12.968135

13 October 1986 EUV Astronomical Spectroscopy With CCD Detectors

R. A. Stern, R. C. Catura, M. M. Blouke, M. Winzenread

Proceedings Volume 0627, Instrumentation in Astronomy VI; (1986) https://doi.org/10.1117/12.968135
Event: 1986 Astronomy Conferences, 1986, Tucson, United States

Abstract

We discuss the applicability of CCD detectors to astronomical extreme ultraviolet (EUV) spectroscopy ( 100 - 1250 Å). The advantages of CCDs in this spectral region include internal electron yield (~ 3-30 e-/per detected photon), the potential for very high quantum efficiency (~ 50-90 percent ), and broad wavelength response. Visible light suppression is achieved by a combination of low grating scattering, great er than unity electron yield in the EUV, and various filter techniques. For the current generation of (Cl),s detection of only a few EUV photons will rapidly overwhelm the read noise ( < 5-10 e- RMS). Thus for all practical S/N ratios used in ast-ronomical spectroscopy, read noise will be negligible compared to the poisson statistics of the detected photons. We will discuss a model based upon experimental data for the quantum efficiency and electron yield of CCDs in the EUV, outline charge trapping and transport considerations, and describe a program to obtain CCDs with stable EUV/UV quantum efficiency for windowless spaceflight operation.

Citation Download Citation

R. A. Stern, R. C. Catura, M. M. Blouke, and M. Winzenread "EUV Astronomical Spectroscopy With CCD Detectors", Proc. SPIE 0627, Instrumentation in Astronomy VI, (13 October 1986); https://doi.org/10.1117/12.968135

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