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Proceedings Paper

Laboratory testbeds for broadband x-ray interferometry
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Paper Abstract

NASA's Strategic Plan for Space Sciences currently envisions a mission capable of resolving the event horizons of supermassive black holes, with imaging-spectroscopy capabilities at angular resolutions better than 0.1 microarcsecond. To achieve this goal, the Micro-Arcsecond X-ray Imaging Mission (MAXIM), a broadband X-ray interferometer, is currently under study. Ground-based proof-of-concept efforts include experiments to demonstrate the feasibility of X-ray interferometry with simple optics. We describe here recent advances in laboratory testbeds, at the University of Colorado and at NASA's Goddard Space Flight Center, that essentially replicate Young's double-slit experiment at X-ray energies. A typical apparatus employs four flat mirrors arranged in periscope pairs, with each pair illuminated at grazing incidence by a slit. We discuss the salient features of these experiments, technical hurdles such as metrology and line-of-sight issues, the successful detection of fringes at wavelengths as short as the Al Kalpha line at 8.35 Angstroms, and future upgrades of our facilities.

Paper Details

Date Published: 11 October 2004
PDF: 7 pages
Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, (11 October 2004); doi: 10.1117/12.551731
Show Author Affiliations
Zaven Arzoumanian, Universities Space Research Association (United States)
NASA Goddard Space Flight Ctr. (United States)
Keith C. Gendreau, NASA Goddard Space Flight Ctr. (United States)
Webster C. Cash, Univ. of Colorado/Boulder (United States)
Ann F. Shipley, Univ. of Colorado/Boulder (United States)
Steven Z. Queen, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 5488:
UV and Gamma-Ray Space Telescope Systems
Guenther Hasinger; Martin J. L. Turner, Editor(s)

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