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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 $$^{10}$$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 $$times$$ 15 mm$$^{2}$$ 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.

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