New design concept of multilayer supermirrors for hard X-ray optics

被引：22

作者：

Yamashita, K ^{[1
]}

Kunieda, H ^{[1
]}

Tawara, Y ^{[1
]}

Tamura, K ^{[1
]}

Ogasaka, Y ^{[1
]}

Haga, K ^{[1
]}

Okajima, T ^{[1
]}

Hidaka, Y ^{[1
]}

Ichimaru, S ^{[1
]}

Takahashi, S ^{[1
]}

Goto, A ^{[1
]}

Kito, H ^{[1
]}

Tsusaka, Y ^{[1
]}

Yokoyama, K ^{[1
]}

Takeda, S ^{[1
]}

机构：

[1] Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan

来源：

X-RAY OPTICS, INSTRUMENTS, AND MISSIONS II | 1999年 / 3766卷

关键词：

multilayer; supermirror; X-ray telescope; hard X-ray; X-ray etalon;

D O I：

10.1117/12.363646

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

It is important to enhance the reflectivity of multilayer supermirrors in 10-100 keV region used for hard X-ray optical systems. For this purpose design methods of multilayer supermirrors have been investigated at the grazing angle of 0.3 deg. by means of the X-ray etalon or phase matching configuration. It means that the Ist and higher order Bragg reflections emanated from different periodic lengths cooperatively enhance the reflectivity at energy bands concerned. The X-ray etalon method is useful for multi-band mirror with the band width of 5 keV or so, but becomes a bit difficult to make the energy band wider (> 10 keV) connecting gaps between isolated bands. Because heavy oscillation of reflectivity curve occurs due to adjacent distructive and constructive interference. The phase matching method is useful to get smooth reflectivity in the broad energy band and is possible to enhance the 2nd order Bragg reflection in higher energy region. We present the design of hard X-ray telescope sensitive in 25-40 keV region by means of multi-block supermirrors of Pt/C multilayers. The effective area was obtained to be more than 100 cm(2).

引用

页码：327 / 335

页数：9

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