12 October 2011 Development of off-plane gratings for WHIMex and IXO
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Future X-ray astronomical missions will need to address a number of important goals such as studying the dynamics of clusters of galaxies, determining how elements are created in the explosions of massive stars, and revealing most of the "normal" matter in the universe which is currently thought to be hidden in hot filaments of gas stretching between galaxies. In order to achieve these goals, spectrometers capable of high resolution and high throughput are necessary for the lowest X-ray energies, 0.3-1.0 keV. We present recent progress in the development of off-plane reflection grating technology for use on upcoming missions. Off-plane grating spectrometers consist of an array of gratings capable of reaching resolutions above 3000 (λ/Δλ). Concept designs have been made for the International X-ray Observatory X-ray Grating Spectrometer. More recently however, we have designed an Optics Module Assembly for WHIMex, an Explorer mission concept that incorporates a Wolter telescope, steering flats, and an array of gratings. This paper will discuss these designs and the application of off-plane arrays for the future.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Randall L. McEntaffer, Randall L. McEntaffer, Webster Cash, Webster Cash, Chuck Lillie, Chuck Lillie, Suzanne Casement, Suzanne Casement, Will Zhang, Will Zhang, Andrew Holland, Andrew Holland, Neil Murray, Neil Murray, Stephen O'Dell, Stephen O'Dell, Mark Schattenburg, Mark Schattenburg, Ralf Heilmann, Ralf Heilmann, Hiroshi Tsunemi, Hiroshi Tsunemi, } "Development of off-plane gratings for WHIMex and IXO", Proc. SPIE 8147, Optics for EUV, X-Ray, and Gamma-Ray Astronomy V, 81471K (12 October 2011); doi: 10.1117/12.895037; https://doi.org/10.1117/12.895037


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