Neutron transmission imaging system with a superconducting kinetic inductance detector

Vu, TheDang*   ; Shishido, Hiroaki*; Aizawa, Kazuya  ; Oku, Takayuki   ; Oikawa, Kenichi   ; Harada, Masahide   ; Kojima, Kenji M*; Miyajima, Shigeyuki*; Soyama, Kazuhiko  ; Koyama, Tomio*; Hidaka, Mutsuo*; Suzuki, Soh Y.*; Tanaka, Manobu M*; Machida, Masahiko  ; Kawamata, Shuichi*; Ishida, Takekazu*

We optimized the design and operating conditions of our superconducting neutron detector to improve spatial resolution. We obtained the best spatial resolution of 10 m when a Gd Siemens star pattern was mounted at close contact with the detector in the cryostat. We compared the effect of a different sample-detector distance on a spatial resolution when the samples were placed either at cryogenic temperature or at room temperature. We found the appearance of clear Bragg dips by the measurements of natural FeS single crystals and succeeded in mapping the distribution of differently-oriented crystals by choosing several Bragg dips of the FeS crystals to compose the transmission images.