J-GLOBAL ID:200904026359352059  Research Project code:0350012000 Update date:Jan. 19, 2004

Development of multiple-plate X-ray reflector

Study period:2001 - 2002
Organization (1):
Investigating Researcher (9):
Research overview:
Thanks to large improvement of sensitivity and a quantity of image information brought about by the X-ray reflector conducting light focusing and image formation, X-ray astronomy has made a great progress. In the X-ray region, however, only the low angled incident light very close to the reflecting surface can be reflected. Under such severe conditions of angled incident light and space-borne limitations, the mirror has to collect faint X-rays coming from the ultimate limit of space. Since the time of 'ASCA' in Japan, multiple-plate reflector with a number of concentrically arranged very thin mirror substrates has been developed. We are promoting further upgrading of this multiple-plate X-ray reflecting mirror to develop a hard X-ray reflector for focusing and image formation up to several ten kilo electron volts. On development, we put stress on the following two points. The first was the attempt to improve precision of image formation by avoiding morphological error of the reflecting substrates. We have obtained the hint for the improvement through the trial-produced structure. We have also started up a replica system and are preparing reflecting mirrors. The second was the improvement of hard X-ray reflectance by film formation of multi-plate super-mirrors. In fiscal 2002, we promoted start-up operation of multiple-plate vacuum deposition system introduced during the preceding year, and actually obtained multilayer film possessing sufficient reflectance at 30 kilo electron volts.
Research program: Ordinary Research
Ministry with control over the research :
Ministry of Education, Culture, Sports, Science and Technology

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