EUV astronomical spectroscopy with CCD detectorsThe applicability of CCD detectors to astronomical extreme ultraviolet (EUV) spectroscopy (100-1250 A) is discussed. The advantages of CCDs in this spectral region include internal electron yield, the potential for very high quantum efficiency (about 50-90 percent), and broad wavelength response. Visible light suppression is achieved by a combination of low grating scattering, greater than unity electron yield in the EUV, and various filter techniques. For the current generation of CCDs, detection of only a few EUV photons will rapidly overwhelm the read noise; thus, for all practical S/N ratios used in astronomical spectroscopy, read noise will be negligible compared to the poisson statistics of the detected photons. A model based on experimental data for the quantum efficiency and electron yield of CCDs in the EUV is discussed.
Document ID
19870049168
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Stern, R. A. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Catura, R. C. (Lockheed Research Laboratories Palo Alto, CA, United States)
Blouke, M. M. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Winzenread, M. (Tektronix, Inc. Beaverton, OR, United States)