Figuring of plano-elliptical neutron focusing mirror by local wet etching.
Local wet etching technique was proposed to fabricate high-performance aspherical mirrors. In this process, only the limited area facing to the small nozzle is removed by etching on objective surface. The desired objective shape is deterministically fabricated by performing the numerically controlled scanning of the nozzle head. Using the technique, a plano-elliptical mirror to focus the neutron beam was successfully fabricated with the figure accuracy of less than 0.5 microm and the focusing gain of 6. The strong and thin focused neutron beam is expected to be a useful tool for the analyses of various material properties.
Yamamura
Kazuya
K
Research Center for Ultra-precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-9871, Japan. yamamura@upst.eng.osaka-u.ac.jp
Nagano
Mikinori
M
Takai
Hiroyuki
H
Zettsu
Nobuyuki
N
Yamazaki
Dai
D
Maruyama
Ryuji
R
Soyama
Kazuhiko
K
Shimada
Shoichi
S
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D009502:Neutrons; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013499:Surface Properties