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11 November 1994 Vertical test facility operating at vacuum ultraviolet for testing very thin wall grazing incidence x-ray mirrors
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Abstract
During the manufacturing of grazing incidence X-ray optics telescopes having a large number of nested thin wall mirror shells, there is the need of making a first assessment of the imaging quality of each shell. The description of a possible test facility to realize these measurements is reported. It operates with the shell axis in vertical position, so to minimize the induced gravity deformation, and the radiation source is in the vacuum ultraviolet spectral region to limit the influence of the diffraction effects on the focal image. The mirror to be analyzed is fully illuminated by means of a collimator and the image at the focal plane is detected with a UV sensitive CCD camera. Moreover, the operation with a collimated light beam allows to make an assessment of the image quality of the fully assembled telescope: in this condition, all the useful area of the mirrors is tested. Some tests realized on a horizontal vacuum facility having the aim to validate this method are also described and the first experimental results are reported.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Oberto Citterio, Paolo Conconi, Mauro Ghigo, Claude A. J. Jamar, Ralf Loi, Francesco Mazzoleni, Giampiero Naletto, Emanuele Pace, Yvan Stockman, Giuseppe Tondello, and Paolo Villoresi "Vertical test facility operating at vacuum ultraviolet for testing very thin wall grazing incidence x-ray mirrors", Proc. SPIE 2279, Advances in Multilayer and Grazing Incidence X-Ray/EUV/FUV Optics, (11 November 1994); https://doi.org/10.1117/12.193158
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