Development of focusing supermirors by means of ultra-precise surface figuring and ion beam sputtering

超精密表面創成とイオンビームスパッタ法による中性子スーパーミラーの開発

山崎 大   ; 林田 洋寿; 丸山 龍治   ; 春日井 好己  ; 篠原 武尚   ; 曽山 和彦  ; 永野 幹典*; 光嶋 直樹*; 山村 和也*

Yamazaki, Dai; Hayashida, Hirotoshi; Maruyama, Ryuji; Kasugai, Yoshimi; Shinohara, Takenao; Soyama, Kazuhiko; Nagano, Mikinori*; Mitsushima, Naoki*; Yamamura, Kazuya*

Neutron beam focusing is essential to perform measurements on small areas of a sample as well as small angle scattering (SANS) measurements in that focusing can both enhance beam intensity at the sample and reduce backgrounds. When it comes to pulsed neutrons, a focusing optics must be free from chromatic aberration. Hence a reflective optics based on total reflection is preferable. We have been developing focusing supermirrors by depositing a supermirror on a precisely figured aspheric surface. We will present measurement results of a multiply-stacked mirror, two-dimensional focusing with a Kirkpatrick-Baez configuration and several applications to sample measurements including SANS and prompt-gamma spectroscopy.