Abstract
We present not the results but the idea of a superconducting nanowire detector with \(^{10}\)B conversion layer for sensing a single neutron. We use \(^{7}\)Li ion and \(^{4}\)He ion emitted as two independent heat sources, which appear in opposite direction associated with nuclear reaction \(^{10}\)B(n,\(^{4}\)He)\(^{7}\)Li. We probe a change in the kinetic inductance \(L_\mathrm{k}\) coming from inertia of the Cooper pairs. Our detector is different from a conventional kinetic inductance detector (KID), but is named as a current-biased KID. We use two sets of Nb nanowires with superconducting readout taps to monitor the local signal. In between the X meander and the Y meander, we inserted a \(^{10}\)B layer acting as a conversion layer from neutrons to charged particles. We plan to fabricate a mega-pixel neutron imager by coupling 10 bit linear position-sensitive arrays along the X and Y directions with the single flux quantum readout circuits.
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Acknowledgments
We thank K. Arai, Y. Akita, Ho T. Huy, and A. Nomura for their assistance in the experiments and Prof. S. Noguchi for his helpful discussions. This work was partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan (KAKENHI KIBAN (S); Grant No. 23226019). The design of the circuits has benefitted from discussions with staff in the clean room for analog-digital superconductivity (CRAVITY) of National Institute of Advanced Industrial Science and Technology (AIST).
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Ishida, T., Yoshioka, N., Narukami, Y. et al. Toward Mega-pixel Neutron Imager Using Current-Biased Kinetic Inductance Detectors of Nb Nanowires with \(^{10}\)B Converter. J Low Temp Phys 176, 216–221 (2014). https://doi.org/10.1007/s10909-014-1159-8
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DOI: https://doi.org/10.1007/s10909-014-1159-8