Translator Disclaimer
24 July 2014 Development of soft x-ray large solid angle camera onboard WF-MAXI
Author Affiliations +
Wide-Field MAXI (WF-MAXI) planned to be installed in Japanese Experiment Module “Kibo” Exposed Facility of the international space station (ISS). WF-MAXI consists of two types of cameras, Soft X-ray Large Solid Angle Camera (SLC) and Hard X-ray Monitor (HXM). HXM is multi-channel arrays of CsI scintillators coupled with avalanche photodiodes (APDs) which covers the energy range of 20 - 200 keV. SLC is arrays of CCD, which is evolved version of MAXI/SSC. Instead of slit and collimator in SSC, SLC is equipped with coded mask allowing its field of view to 20% of all sky at any given time, and its location determination accuracy to few arcminutes. In older to achieve larger effective area, the number of CCD chip and the size of each chip will be larger than that of SSC. We are planning to use 59 x 31 mm2 CCD chip provided by Hamamatsu Photonics. Each camera will be quipped with 16 CCDs and total of 4 cameras will be installed in WF-MAXI. Since SLC utilize X-ray CCDs it must equip active cooling system for CCDs. Instead of using the peltier cooler, we use mechanical coolers that are also employed in Astro-H. In this way we can cool the CCDs down to -100C. ISS orbit around the earth in 90 minutes; therefore a point source moves 4 arcminutes per second. In order to achieve location determination accuracy, we need fast readout from CCD. The pulse heights are stacked into a single row along the vertical direction. Charge is transferred continuously, thus the spatial information along the vertical direction is lost and replaced with the precise arrival time information. Currently we are making experimental model of the camera body including the CCD and electronics for the CCDs. In this paper, we show the development status of SLC.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Masashi Kimura, Hiroshi Tomida, Shiro Ueno, Nobuyuki Kawai, Yoichi Yatsu, Makoto Arimoto, Tatehiro Mihara, Motoko Serino, Hiroshi Tsunemi, Atsumasa Yoshida, Takanori Sakamoto, Takayoshi Kohmura, and Hitoshi Negoro "Development of soft x-ray large solid angle camera onboard WF-MAXI", Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 914460 (24 July 2014);


Progress of the x ray CCD camera development for the...
Proceedings of SPIE (September 26 2013)
Technology validation of the PLATO CCD at ESA
Proceedings of SPIE (July 29 2016)
CUBIC x ray CCD spectroscopy of the diffuse x...
Proceedings of SPIE (September 01 1995)
Solid state slit camera (SSC) of the MAXI mission for...
Proceedings of SPIE (December 13 2000)
UV/visible camera for the Clementine mission
Proceedings of SPIE (June 02 1995)
EPIC system onboard the ESA XMM
Proceedings of SPIE (October 31 1996)

Back to Top