Dynamic range considerations for EUV MAMA detectors

Rainer M. E. Illing; Richard L. Bybee; J. Gethyn Timothy

doi:10.1117/12.23252

1 November 1990 Dynamic range considerations for EUV MAMA detectors

Rainer M. E. Illing, Richard L. Bybee, J. Gethyn Timothy

Proceedings Volume 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy; (1990) https://doi.org/10.1117/12.23252
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

The multianode microchannel array (MAMA) has been chosen as the detector for two instruments on the ESA/NASA Solar Heliospheric Observatory. The response of the MAMA to the two extreme types of solar spectra, disk and corona, have been modeled with a view toward evaluating dynamic range effects present. The method of MAMA operation is discussed, with emphasis given to modeling the effect of electron cloud charge spreading to several detector anodes and amplifiers (n-fold events). Representative synthetic EUV spectra have been created. The detector response to these spectra is modeled by dissecting the input photon radiation field across the detector array into contributions to the various amplifier channels. The results of this dissection are shown for spectral regions across the entire wavelength region of interest. These results are used to identify regions in which total array photon counting rate or individual amplifier rate may exceed the design limits. This allows the design or operational modes to be tailored to eliminate the problem areas.

Citation Download Citation

Rainer M. E. Illing, Richard L. Bybee, and J. Gethyn Timothy "Dynamic range considerations for EUV MAMA detectors", Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); https://doi.org/10.1117/12.23252

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