Superconducting MgB2 Thin Film Detector for Neutrons

Ishida, Toshimasa; Nishikawa, Masaru; Fujita, Yoshifumi; Okayasu, Satoru; Katagiri, Masaki; Satoh, Kazuo; Yotsuya, Tsutomu; Shimakage, Hisashi; Miki, Shigehito; Wang, Zhen; Machida, Masahiko; Kano, Takuma; Kato, Masaru

doi:10.1007/s10909-008-9790-x

Cited by 45 publications

(25 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inverting the simple model relation (2) we can infer a diameter of the hotspot in the order of 5 µm, which is the right order of magnitude. Moreover, since Δh for Nb and NbN (for Nb, see for instance [23]) is not very different (at the same temperature), we see from (1) that we may take this value as typical. On the other hand, measurement of the count rate is performed with both temperature and bias current fixed.…”

mentioning

confidence: 90%

“…Initially, a scheme based on the absorption in the superconducting compound MgB 2 has been proposed [23] (so that the same material acts both as a converting and detecting medium) where voltage pulses under irradiation have been observed. In later works [24,25] an interesting concept has been proposed where detection is made possible by a boron layer superimposed on a Nb nanowire.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Superconducting Strips: A Concept in Thermal Neutron Detection

Merlo

2018

Instruments

View full text Add to dashboard Cite

Abstract:In the never-ending quest for better detection efficiency and spatial resolution, various thermal neutron detection schemes have been proposed over the years. Given the presence of some converting layers (typically boron, but 6 LiF is also widely used nowadays), the shift towards concepts based on solid state detectors has been steadily increasing and ingenious schemes thereby proposed. However, a trade-off has been always sought for between efficiency and spatial resolution; the problem can be (at least partially) circumvented using more elaborate geometries, but this complicates the sample preparation and detector construction. Thus, viable alternatives must be found. What we proposed (and verified experimentally) is a detection scheme based on the superconducting to normal transition. More precisely, using a boron converting layer, the α particles (generated in the (n, α) reaction) crossing a low critical temperature superconducting strip some 10 µm wide have been detected; the process, bolometric in nature and based on the ionization energy loss, is intrinsically fast and the spatial resolution very appealing. In this work, some of the work done so far will be illustrated, together with the principles of the measurement and various related problems. The realization of the detector is based on industrial deposition and photolitographic techniques well within the grasp of a condensed matter laboratory, so that there is substantial room for improvement over our elementary strip geometry. Some of the plans for future work will also be presented, together with some improvements both in the choice of the materials and the geometry of the detector.

show abstract

mentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Superconducting Strips: A Concept in Thermal Neutron Detection

Merlo

2018

Instruments

View full text Add to dashboard Cite

show abstract

“…Configuration of a neutron diffraction system [22] based on MgB 2 thin film detectors [23] and an RSFQ signal processor is displayed in Fig. 5 as a typical example of a superconductor detector array system.…”

Section: Applications Of Rsfq Circuitsmentioning

confidence: 99%

Advancement of superconductor digital electronics

Fujimaki

2012

IEICE Electron. Express

View full text Add to dashboard Cite

Advancement of superconductor digital electronics, especially Rapid Single Flux Quantum (RSFQ) logic circuit is described. Ultra short pulse of a voltage generated across a Josephson junction and release from charging/discharging process for signal transmission in RSFQ circuits enable us to reduce power consumption and gate delay. The power-delay products (PDPs) of RSFQ integrated circuits (ICs) are 4 or 5 orders of magnitude smaller than those of semiconductor ICs. The fabrication process technology and the related designing technology have been advanced, and RSFQ ICs have been applied to software-defined radio receivers, superconductor detector array systems, and supercomputers. Recently, several kinds of energy-efficient single flux quantum circuit have been proposed to obtain further advantage to semiconductor devices. The PDPs of these circuits become at least 1 order smaller than those of conventional RSFQ circuits. Keywords: single flux quantum, superconductor, energy efficiency, high-speed, power-delay product Classification: Superconducting electronics References

show abstract

“…One of the interesting ideas for utilizing MgB 2 is the design of a superconducting single neutron detector (SSND) [4][5][6][7][8][9][10][11][12][13][14][15][16]. This detector is based on the neutron capture by the nuclear reactions of a single neutron and the 10 B in MgB 2 .…”

Section: Introductionmentioning

confidence: 99%

“…In our preceding study [15], we already succeeded in observing a signal caused by irradiating cold neutrons from a research reactor by using an MgB 2 detector. There are superior characteristics on the MgB 2 detector.…”

Section: Introductionmentioning

confidence: 99%

Position Dependent Response of Superconducting MgB2 Neutron Detectors Studied by Pulsed Laser Irradiation

et al. 2012

Self Cite

View full text Add to dashboard Cite

The MgB 2 detector consists of 200 nm thick MgB 2 thin film meander structure of 3 µm line width protected by 300 nm thick SiO layer. The electrical connections were provided by 150 nm thick Nb. The devices were placed in a 4 K refrigerator to investigate the behavior at temperatures below T c . The position-dependent response of the MgB 2 detector can be investigated by scanning a laser spot with the T. Ishida ( ) · I448 J Low Temp Phys (2012) 167:447-454 aid of the XY Z piezo-driven stage and an optical fiber with a focusing lens. We found that the inhomogeneity in a detector is very critical to specify the detection efficiency since the detector has the sensitivity only in a narrow temperature regime near T c .

show abstract

Superconducting MgB2 Thin Film Detector for Neutrons

Cited by 45 publications

References 6 publications

Superconducting Strips: A Concept in Thermal Neutron Detection

Superconducting Strips: A Concept in Thermal Neutron Detection

Advancement of superconductor digital electronics

Position Dependent Response of Superconducting MgB2 Neutron Detectors Studied by Pulsed Laser Irradiation

Contact Info

Product

Resources

About