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31 October 1996 Performance of transmission filters for EUV and soft x-ray astronomy
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Abstract
Soft x-ray detectors for astronomical applications are often also sensitive to visible and UV photons. Filters of a new design have been developed, which could be used in future missions to suppress the flooding of x-ray detectors by low energy photons. Three series of filters are discussed: aluminum/silicon multilayers, Niobium and calcium/boron multilayers. The filters are typically 100 to 200 nm thick and reject the IR/visible/UV from 10-4 to 10-6. The transmission for soft x-rays is above 10% for wavelengths less than 30 nm, when combining the bandpasses of at least two filters. The optimum transmission band depends very much on the filter type. The IR/visible/UV has been measured using standard laboratory spectro- photometers while the x-ray transmission characteristics have been determined using synchrotron radiation.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marcos Bavdaz, Anthony J. Peacock, Roland H. den Hartog, Abel Poelaert, Peter J. Underwood, Veli-Pekka Viitanen, Detlef Fuchs, Peter Bulicke, Stefan Kraft, Frank Scholze, Gerhard Ulm, and Annesley C. Wright "Performance of transmission filters for EUV and soft x-ray astronomy", Proc. SPIE 2808, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VII, (31 October 1996); https://doi.org/10.1117/12.256004
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