Calibration of the AXAF-HRC UV/ion shields at the Osservatorio Astronomico di Palermo G.S. Vaiana: IV - UV rejection measurements

Marco Barbera; Alfonso Collura; Alessandro Dara; Salvatore Serio; Martin V. Zombeck

doi:10.1117/12.255987

31 October 1996 Calibration of the AXAF-HRC UV/ion shields at the Osservatorio Astronomico di Palermo G.S. Vaiana: IV - UV rejection measurements

Marco Barbera, Alfonso Collura, Alessandro Dara, Salvatore Serio, Martin V. Zombeck

Author Affiliations +

Proceedings Volume 2808, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VII; (1996) https://doi.org/10.1117/12.255987
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

The AXAF-HRC UV/ion shields have to provide high UV rejection from diffuse background and bright UV sources (e.g. rejection greater than 10⁷ at wavelength longer than approximately 300 angstrom for the HRC-I). In the framework of the AXAF-HRC calibration program we have conducted UV (300 - 2500 angstrom) and FUV/visible (1900 - 10,000 angstrom) transmission measurements on the baseline design UV/ion shields based on Lexan and aluminum. The results of these measurements, here reported, have shown that the baseline design UV/ion shields did not meet the scientific requirements of UV opacity and as a consequence, the UV/ion shields were redesigned. UV tests of new UV/ion shields, based on new materials, is in progress.

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Marco Barbera, Alfonso Collura, Alessandro Dara, Salvatore Serio, and Martin V. Zombeck "Calibration of the AXAF-HRC UV/ion shields at the Osservatorio Astronomico di Palermo G.S. Vaiana: IV - UV rejection measurements", Proc. SPIE 2808, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VII, (31 October 1996); https://doi.org/10.1117/12.255987

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