Performance of the demonstration model of DIOS FXT

Details Performance of the demonstration model of DIOS FXT Performance of the demonstration model of DIOS FXT

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spie.7437e..57t&link_type=abstract

Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV. Edited by Tawara, Yuzuru; Sakurai, Ikuya; Masuda, Tadashi; Torii, Tatsuharu;

Physics

Optics

Scientific paper

To search for warm-hot intergalactic medium (WHIM), a small satellite mission DIOS (Diffuse Intergalactic Oxygen Surveyor ) is planned and a specially designed four-stage X-ray telescope (FXT) has been developed as the best fit optics to have a wide field of view and large effective area. Based on the previous design work and mirror fabrication technology used in the Suzaku mission, we made small demonstration model of DIOS FXT. This model has focal length of 700 mm consisting of quadrant housing and four-stage mirror sets with different radii of 150 - 180 mm and each stage mirror hight of 40 mm. We performed X-ray measurement for one set of four-stage mirror with a radius of 180 mm. From the results of the optical and X-ray measurement, it was found that tighter control were required for positioning and fabrication process of each mirror even to get angular resolution of several arcmin.

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