Characterization of NiC/Ti supermirror deposited on a metallic substrate

Tamura, Itaru; Kashima, Yoichi; Soyama, Kazuhiko

JAEA-Research 2014-029, 12 Pages, 2015/03

JAEA-Research-2014-029.pdf:1.89MB

Neutron guide tubes, which are installed near reactor cores, are damaged by neutrons and rays irradiation. Those glass substrates which contain boron material are affected by (n, ) reaction, and ionization effect of rays on material strength decrease duration of use of neutron guide tubes. In order to increase resistance to radiation, we have fabricated a supermirror with Ni-P metallic substrate. The substrate roughness with 0.2 - 0.3 nm (rms) was produced by super- polishing. The neutron reflectivity reached 76 % for an m=3 supermirror.