11 March 2003 Monitoring the stability of thin and medium back-up filters of the Newton-XMM EPIC camera
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We are conducting a measurement program on back-up filters of the XMM-Newton EPIC camera aimed at monitoring possible aging effects during the mission lifetime. One thin and one medium EPIC back-up filters have been stored since 1997 in an environment similar to that one of the flight filters (dry nitrogen box before launch, high vacuum after launch). The transmission of the two filters has been measured periodically in the 1900-10000 angstrom wavelength range where effects of aging would be clearly evident. The preliminary results, after 5 years of monitoring, show that a slight aging effect has occurred on both filters which, however, has no significant impact onto the EPIC calibration for the correct analysis of the X-ray astrophysical observations.
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Marco Barbera, Marco Barbera, Alfonso Collura, Alfonso Collura, Marinella A. Artale, Marinella A. Artale, Salvatore Varisco, Salvatore Varisco, Giovanni Peres, Giovanni Peres, Salvatore Sciortino, Salvatore Sciortino, Salvatore Serio, Salvatore Serio, Gabriele E. Villa, Gabriele E. Villa, } "Monitoring the stability of thin and medium back-up filters of the Newton-XMM EPIC camera", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461592; https://doi.org/10.1117/12.461592

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