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Shishido, Hiroaki*; Nishimura, Kazuma*; Vu, TheDang*; Aizawa, Kazuya; Kojima, Kenji M*; Koyama, Tomio*; Oikawa, Kenichi; Harada, Masahide; Oku, Takayuki; Soyama, Kazuhiko; et al.
IEEE Transactions on Applied Superconductivity, 31(9), p.2400505_1 - 2400505_5, 2021/12
Times Cited Count:0 Percentile:0(Engineering, Electrical & Electronic)In this study, we employed a superconducting detector, current-biased kinetic-inductance detector (CB-KID) for neutron imaging using a pulsed neutron source. We employed the delay-line method, and high spatial resolution imaging with only four reading channels was achieved. We also performed wavelength-resolved neutron imaging by the time-of-flight method. We obtained the neutron transmission images of a Gd-Al alloy sample, inside which single crystals of GdAl were grown, using the delay-line CB-KID. Single crystals were well imaged, in both shapes and distributions, throughout the Al-Gd alloy. We identified Gd nuclei via neutron transmissions that exhibited characteristic suppression above the neutron wavelength of 0.03 nm. In addition, the
Gd resonance dip, a dip structure of the transmission caused by the nuclear reaction between an isotope and neutrons, was observed even when the number of events was summed over a limited area of 15
m
12
m. Gd selective imaging was performed using the resonance dip of
Gd, and it showed clear Gd distribution even with a limited neutron wavelength range of 1 pm.
Vu, TheDang; Shishido, Hiroaki*; Aizawa, Kazuya; Kojima, Kenji M*; Koyama, Tomio*; Oikawa, Kenichi; Harada, Masahide; Oku, Takayuki; Soyama, Kazuhiko; Miyajima, Shigeyuki*; et al.
Nuclear Instruments and Methods in Physics Research A, 1006, p.165411_1 - 165411_8, 2021/08
Times Cited Count:0 Percentile:0.02(Instruments & Instrumentation)Vu, TheDang; Shishido, Hiroaki*; Kojima, Kenji M*; Koyama, Tomio*; Oikawa, Kenichi; Harada, Masahide; Miyajima, Shigeyuki*; Oku, Takayuki; Soyama, Kazuhiko; Aizawa, Kazuya; et al.
Superconductor Science and Technology, 34(1), p.015010_1 - 015010_10, 2021/01
Times Cited Count:3 Percentile:44.08(Physics, Applied)Vu, TheDang; Nishimura, Kazuma*; Shishido, Hiroaki*; Harada, Masahide; Oikawa, Kenichi; Miyajima, Shigeyuki*; Hidaka, Mutsuo*; Oku, Takayuki; Soyama, Kazuhiko; Aizawa, Kazuya; et al.
Journal of Physics; Conference Series, 1590, p.012036_1 - 012036_9, 2020/07
Times Cited Count:0 Percentile:0.01Iizawa, Yuki*; Shishido, Hiroaki*; Nishimura, Kazuma*; Vu, TheDang*; Kojima, Kenji M*; Koyama, Tomio*; Oikawa, Kenichi; Harada, Masahide; Miyajima, Shigeyuki*; Hidaka, Mutsuo*; et al.
Superconductor Science and Technology, 32(12), p.125009_1 - 125009_8, 2019/12
Times Cited Count:11 Percentile:60.35(Physics, Applied)Vu, TheDang; Iizawa, Yuki*; Nishimura, Kazuma*; Shishido, Hiroaki*; Kojima, Kenji*; Oikawa, Kenichi; Harada, Masahide; Miyajima, Shigeyuki*; Hidaka, Mutsuo*; Oku, Takayuki; et al.
Journal of Physics; Conference Series, 1293, p.012051_1 - 012051_9, 2019/10
Times Cited Count:5 Percentile:95.3Hayashi, Koichi*; Oyama, Kenji*; Happo, Naohisa*; Matsushita, Tomohiro*; Hosokawa, Shinya*; Harada, Masahide; Inamura, Yasuhiro; Nitani, Hiroaki*; Shishido, Toetsu*; Yubuta, Kunio*
Science Advances (Internet), 3(8), p.e1700294_1 - e1700294_7, 2017/08
Miyajima, Shigeyuki*; Shishido, Hiroaki*; Narukami, Yoshito*; Yoshioka, Naohito*; Fujimaki, Akira*; Hidaka, Mutsuo*; Oikawa, Kenichi; Harada, Masahide; Oku, Takayuki; Arai, Masatoshi*; et al.
Nuclear Instruments and Methods in Physics Research A, 842, p.71 - 75, 2017/01
Times Cited Count:13 Percentile:81.93(Instruments & Instrumentation)Tonegawa, Sho*; Hashimoto, Kenichiro*; Ikada, Kisuke*; Tsuruhara, Yugo*; Lin, Y.-H.*; Shishido, Hiroaki*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; et al.
Physical Review B, 88(24), p.245131_1 - 245131_13, 2013/12
Times Cited Count:12 Percentile:50.42(Materials Science, Multidisciplinary)Tonegawa, Sho*; Hashimoto, Kenichiro*; Ikada, Kisuke*; Lin, Y.-H.*; Shishido, Hiroaki*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; Ikeda, Hiroaki*; et al.
Physical Review Letters, 109(3), p.036401_1 - 036401_5, 2012/07
Times Cited Count:53 Percentile:88.25(Physics, Multidisciplinary)Okazaki, Ryuji*; Shimozawa, Masaaki*; Shishido, Hiroaki*; Konczykowski, M.*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; Yanase, Yoichi*; Shibauchi, Takasada*; et al.
Journal of Physics; Conference Series, 273, p.012081_1 - 012081_4, 2011/02
Times Cited Count:3 Percentile:64.03Okazaki, Ryuji*; Konczykowski, M.*; Van der Beek, C. J.*; Kato, Tomonari*; Hashimoto, Kenichiro*; Shimozawa, Masaaki*; Shishido, Hiroaki*; Yamashita, Minoru*; Ishikado, Motoyuki; Kito, Hijiri*; et al.
Physica C, 470(Suppl.1), p.S485 - S486, 2010/12
Times Cited Count:0 Percentile:0(Physics, Applied)We report the lower critical fields measurements on Fe-based oxipnictide PrFeAsO
single crystals for
and
-planes. To avoid the difficulty of
determinations due to the flux pinning, we developed a novel method using a miniature hall-sensor array which can evaluate the local magnetic induction ai each sensor position. The hall sensor which is placed on the edge of the crystal clearly resolves the first flux penetration from the Meissner state. The temperature dependence of
for
is well scaled by the in-plane penetration depth and is consistent with a full-gap superconducting state. The anistropy of
at low temperatures is estimated to be
3, which is much smaller than of
. This indicates the multiband superconductivity, in which the active bands for superconductivity are more two-dimensional.
Van der Beek, C. J.*; Rizza, G.*; Konczykowski, M.*; Fertey, P.*; Monnet, I.*; Okazaki, Ryuji*; Kato, Tomonari*; Hashimoto, Kenichiro*; Shimozawa, Masaaki*; Shishido, Hiroaki*; et al.
Physica C, 470(Suppl.1), p.S385 - S386, 2010/12
Times Cited Count:1 Percentile:6.73(Physics, Applied)Crystalline disorder in the pnictide superconductor PrFeAsO is studied using magneto-optical visualisation of flux penetration, transmission electron microscopy, and X-ray diffraction using synchrotron radiation. Critical-state like flux distributions and the magnitude and temperature dependence of the critical current demonstrate bulk vortex pinning by oxygen vacancies at all temperatures.
Matsuda, Tatsuma; Ikeda, Shugo*; Yamamoto, Etsuji; Haga, Yoshinori; Shishido, Hiroaki*; Yamagami, Hiroshi; Settai, Rikio*; Onuki, Yoshichika
Journal of the Physical Society of Japan, 79(11), p.114712_1 - 114712_4, 2010/11
Times Cited Count:4 Percentile:33.57(Physics, Multidisciplinary)We have succeeded in growing a high-quality single crystal of UCuSi
with the tetragonal structure by the Sn-flux method and measured the de Haas-van Alphen effect. UCu
Si
orders antiferromagnetically below
= 106 K, and follows a successive ferromagnetic ordering at
= 100 K. Several de Haas-van Alphen branches are observed in the ferromagnetic state, ranging from 5
10
to 7
10
Oe. The corresponding cyclotron effective masses are moderately large, ranging from 1.4 to 4.2
, consistent with the electronic specific heat coefficient
= 20 mJ/K
mol. These experimental results are approximately explained by the 5
-itinerant spin- and orbital-polarized energy band model.
Matsuda, Yuji*; Okazaki, Ryuji*; Kasahara, Yuichi*; Shishido, Hiroaki*; Shibauchi, Takasada*; Haga, Yoshinori; Matsuda, Tatsuma; Onuki, Yoshichika
Physica C, 470(20), p.1013 - 1017, 2010/11
Times Cited Count:1 Percentile:6.73(Physics, Applied)Okazaki, Ryuji*; Shimozawa, Masaaki*; Shishido, Hiroaki*; Konczykowski, M.*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; Yanase, Yoichi*; Shibauchi, Takasada*; et al.
Journal of the Physical Society of Japan, 79(8), p.084705_1 - 084705_7, 2010/08
Times Cited Count:15 Percentile:65.64(Physics, Multidisciplinary)Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.
Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05
Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.
Okazaki, Ryuji*; Konczykowski, M.*; Van der Beek, C. J.*; Kato, Tomonari*; Hashimoto, Kenichiro*; Shimozawa, Motoyuki*; Shishido, Hiroaki*; Yamashita, Minoru*; Ishikado, Motoyuki; Kito, Hijiri*; et al.
Physical Review B, 79(6), p.064520_1 - 064520_6, 2009/02
Times Cited Count:57 Percentile:87.47(Materials Science, Multidisciplinary)We have studied the lower critical fields H of superconducting iron oxipnictide PrFeAsO
single crystals for H parallel and perpendicular to the ab-planes.
Matsuda, Tatsuma; Haga, Yoshinori; Sakai, Hironori; Aoki, Dai*; Ikeda, Shugo; Yamamoto, Etsuji; Shishido, Hiroaki*; Settai, Rikio*; Harima, Hisatomo*; Onuki, Yoshichika
Journal of the Physical Society of Japan, 77(2), p.024704_1 - 024704_6, 2008/02
Times Cited Count:1 Percentile:11.85(Physics, Multidisciplinary)We succeeded in growing a high-quality single crystal of LuCoGa with the HoCoGa
-type tetragonal crystal structure by the Ga self-flux method. The lattice parameters, fractional coordinates, and thermal parameters were determined from single-crystal X-ray diffraction measurements. We also measured the electrical resistivity, specific heat, and the de Haas-van Alphen (dHvA) effect. The Fermi surface mainly consists of two nearly cylindrical Fermi surfaces, which are well explained by the results of full-potential linearized augmented plane wave (FLAPW) energy band calculations.
Okazaki, Ryuji*; Kasahara, Yuichi*; Shishido, Hiroaki*; Konczykowski, M.*; Behnia, K.*; Haga, Yoshinori; Matsuda, Tatsuma; Onuki, Yoshichika; Shibauchi, Takasada*; Matsuda, Yuji*
Physical Review Letters, 100(3), p.037004_1 - 037004_4, 2008/01
Times Cited Count:27 Percentile:76.29(Physics, Multidisciplinary)