Development of Capillary-Plate X-ray Optics

Yu-ichiro Ezoe.$^1$, Kazuo Makishima.$^1$, Masahiko Sugiho.$^1$, Takuji Atsumi.$^2$

$^1$Tokyo Univ., Hongo, Tokyo, Japan\newline
$^2$Hamamatsu Photonics., Hamamatsu, Shizuoka, Japan\newline


Utilizing reflection of X-rays in narrow channels of a capillary plate,
we can concentrate X-rays onto a small area.
Such optics, far lighter than the usual X-ray telescopes,
can also be used as very efficient wide-field-of-view optics,
for example, an all sky monitor, in X-ray astronomy.
As a first step of  R\&D, we have measured energy and angular responses
of three different types of planar capillary plates,
manufactured by the Hamamatsu Photonics, in the 5--9 keV range,
all of which showed the reflection of X-rays. 
We report on the obtained results,
together with those on a tapered capillary plate.