An application of active optics to x-ray imaging: X-mas (x-ray milli arc-second) project

Masahiro Tsujimoto; Shunji Kitamoto; Yohsuke Ohkubo; Jun'ichi Sato; Takeshi Watanabe; Keisuke Sudoh; Akiko Sekiguchi; Kazuharu Suga; Hiroyuki Sekiguchi

doi:10.1117/12.670937

28 June 2006 An application of active optics to x-ray imaging: X-mas (x-ray milli arc-second) project

Masahiro Tsujimoto, Shunji Kitamoto, Yohsuke Ohkubo, Jun'ichi Sato, Takeshi Watanabe, Keisuke Sudoh, Akiko Sekiguchi, Kazuharu Suga, Hiroyuki Sekiguchi

Author Affiliations +

Proceedings Volume 6272, Advances in Adaptive Optics II; 62724T (2006) https://doi.org/10.1117/12.670937
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We report the current status of the "X-mas" (X-ray milli-arcsecond) project. X-mas is an application of the AO technology to the X-ray optics, aiming to obtain high-resolution defraction-limited X-ray images. Our X-ray telescope employs the Newton optics with a paraboloid primary and a 31-element deformable secondary mirrors. The aperture of the primary mirror is 80 millimeters with the focal length of 2 meters. Multi-layer coating of the mirrors by silicon and molybdenum realizes a large reflectivity of ~60% for the primary and 30-50% for the secondary mirror at 13.5 nm, which enables us to construct a normal incidence optics at this wavelength. We use a laser guide source and a wave front sensor to optimize the form of the secondary deformable mirror for the purpose of offsetting the large-scale figure errors in the X-ray optics. A back-side illumination X-ray CCD detector manufactured by Hamamatsu Photonics is used for X-ray detections. We have assembled all these elements and started to accumulate data. Closed-loop AO is in operation for the laser guide source. Likely X-ray images are obtained through the telescope. The results in 2005-2006 are presented.

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Masahiro Tsujimoto, Shunji Kitamoto, Yohsuke Ohkubo, Jun'ichi Sato, Takeshi Watanabe, Keisuke Sudoh, Akiko Sekiguchi, Kazuharu Suga, and Hiroyuki Sekiguchi "An application of active optics to x-ray imaging: X-mas (x-ray milli arc-second) project", Proc. SPIE 6272, Advances in Adaptive Optics II, 62724T (28 June 2006); https://doi.org/10.1117/12.670937

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KEYWORDS

X-rays

X-ray optics

X-ray imaging

X-ray detectors

Mirrors

Adaptive optics

Charge-coupled devices

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