NDLI: Current-Biased Transition Edge Detector of <formula formulatype=inline><tex Notation=TeX>$ hbox{MgB}_{2}$</tex></formula> Nanowires for Neutrons: Imaging by Scanning Laser

Content Provider	IEEE Xplore Digital Library
Author	Yagi, I. Yoshioka, N. Shishido, H. Yotsuya, T. Miki, S. Zhen Wang Ishida, T.
Copyright Year	2002
Abstract	The superconducting MgB₂ nanowire detector is biased by a current by a battery-class low voltage, and uses the nuclear reactions with a single neutron and the ¹⁰B contained in MgB₂. The MgB₂ detector consists of a 200-nm-thick MgB₂ thin film meander structure of 3 μm line width protected by 300-nm-thick SiO layer. We use enriched boron ¹⁰B to enhance the sensitivity. The thermal energy of 2.3 MeV released by the reaction ¹⁰ B(n, α)⁷Li gives 1.83 MeV to ⁴He and 0.47 MeV to ⁷Li. The energy dissipation in a restricted space causes a local resistive state in the MgB₂ wire, which yields a subtle change in bias current. Through a mutual inductance connected in series with current-biased detector, we are able to measure the event as a voltage pulse. The position-dependent response of the MgB₂ detector is investigated by scanning a focused laser spot with the aid of an XYZ piezo-driven stage and an optical fiber with a focusing lens. A clear two-dimensional imaging pattern of the sensor signal well corresponds to the detector geometry. According to our results, the inhomogeneity and position-sensitive nature of the detector are supposed to be critical in governing the detection efficiency of the current-biased transition edge detector, which works only in the narrow temperature regime near T_c.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2200904
Ending Page	2200904
Page Count	1
File Size	882187
File Format	PDF
ISSN	10518223
Volume Number	23
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Neutrons Laser transitions Image edge detection Measurement by laser beam Wires Temperature measurement pulsed laser Current-biased transition edge detector imaging $\hbox{MgB}_{2}$ neutron detector
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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