ALEXIS experiment: current status and performance

Jeffrey J. Bloch; William C. Priedhorsky; Diane C. Roussel-Dupre; Bradley C. Edwards; Barham W. Smith

doi:10.1117/12.130669

8 October 1992 ALEXIS experiment: current status and performance

Jeffrey J. Bloch, William C. Priedhorsky, Diane C. Roussel-Dupre, Bradley C. Edwards, Barham W. Smith

Proceedings Volume 1743, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III; (1992) https://doi.org/10.1117/12.130669
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

The Array of Low Energy X-ray Imaging Sensors (ALEXIS) experiment consists of a mini-satellite containing six wide angle EUV/ultrasoft X-ray telescopes. Its purpose is to mp out the sky in three narrow (5%) baridpasses around 66, 71, arid 93 eV. The mission will be launched on the Pegasus Air Launched Vehicle in 1992 into a 400 nautical mile, high inclination orbit. The project is a collaborative effort between Los Alamos National Laboratory, Sandia National Laboratory, and the University of California-Berkeley Space Sciences Laboratory. The six telescopes are arranged in three pairs in such a manner that as the satellite spins twice a minute they scan the entire antisolar hemisphere. Each f/i telescope consists of a spherical multilayer coated mirror with a spherical microchannel plate detector located at the prime focus and a thin aluminum or lexan/boron filter in front of the detector. The multilayer coatings determine the bandpasses of the telescopes. Each telescope has a field of view of 33 degrees. Unlike grazing incidence x-ray telescopes, the point spread function is uniform over the entire field of view with a FWHM of O.5degrees determined by spherical aberration. In this paper we present the status of the project as of July i992 as well as summary results from the pre-flight telescope calibration procedures.

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Jeffrey J. Bloch, William C. Priedhorsky, Diane C. Roussel-Dupre, Bradley C. Edwards, and Barham W. Smith "ALEXIS experiment: current status and performance", Proc. SPIE 1743, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III, (8 October 1992); https://doi.org/10.1117/12.130669

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KEYWORDS

Telescopes

Space telescopes

Sensors

Extreme ultraviolet

X-ray astronomy

X-rays

X-ray telescopes

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