Energy-resolved neutron imaging using a delay line current-biased kinetic-inductance detector

Shishido, Hiroaki*; Nishimura, Kazuma*; Vu, TheDang*   ; Kojima, Kenji M*; Koyama, Tomio*; Oikawa, Kenichi   ; Harada, Masahide   ; Miyajima, Shigeyuki*; Hidaka, Mutsuo*; Oku, Takayuki   ; Soyama, Kazuhiko  ; Aizawa, Kazuya  ; Suzuki, Soh Y*; Ishida, Takekazu*

We demonstrate the development of an energy resolved neutron transmission imaging system via a solid-state superconducting detector, called current-biased kinetic-inductance detector (CB-KID). CB-KIDs comprise X and Y superconducting Nb meanderlines with Nb ground plane and a B conversion layer, which converts a neutron to two charged particles. CB-KID uses the delay-line method, and allows us to reconstruct the two-dimensional neutron transmission image of a test sample with four signal readout lines. We examined the capability of high spatial and energy (wavelength) resolved neutron transmission imaging over the sensor active area of 15 15 mm for various samples, including biological and metal ones. We also demonstrated the capability for the Bragg edge transmission and an energy-resolved neutron image in which stainless-steel specimens were discriminating from other specimens.