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Kondo, Yosuke*; Achouri, N. L.*; Al Falou, H.*; Atar, L.*; Aumann, T.*; Baba, Hidetada*; Boretzky, K.*; Caesar, C.*; Calvet, D.*; Chae, H.*; et al.
Nature, 620(7976), p.965 - 970, 2023/08
Times Cited Count:21 Percentile:95.78(Multidisciplinary Sciences)no abstracts in English
Thiessen, K. M.*; Boznar, M. Z.*; Charnock, T. W.*; Chouhan, S. L.*; Federspiel, L.; Grai
, B.*; Grsic, Z.*; Helebrant, J.*; Hettrich, S.*; Hulka, J.*; et al.
Journal of Radiological Protection, 42(2), p.020502_1 - 020502_8, 2022/06
Times Cited Count:5 Percentile:68.13(Environmental Sciences)Hwang, J.-G.*; Kim, E.-S.*; Miyajima, Tsukasa*; Honda, Yosuke*; Harada, Kentaro*; Shimada, Miho*; Takai, Ryota*; Kume, Tatsuya*; Nagahashi, Shinya*; Obina, Takashi*; et al.
Nuclear Instruments and Methods in Physics Research A, 753, p.97 - 104, 2014/07
Times Cited Count:7 Percentile:46.03(Instruments & Instrumentation)Kwak, J. G.*; Wang, S. J.*; Bae, Y. D.*; Kim, S. H.*; Hwang, C. K.*; Moriyama, Shinichi
Fusion Engineering and Design, 86(6-8), p.938 - 941, 2011/10
Times Cited Count:1 Percentile:10.43(Nuclear Science & Technology)KAERI have been developing the transmitters for ICRF heating for KSTAR and the cyclotron accelerator since 1996. The toroidal magnetic field of KSTAR is nominally 3 T so that 25-60 MHz transmitter is required to cover ICRF heating scenarios of the KSTAR. The first transmitter is operating up to 60 MHz and it succeeded in achieving 2 MW for 300 s in 2008. Up to 300 kW RF power was successfully injected to KSTAR plasmas. The second one is 70 kW/CW transmitter used for the cyclotron accelerator and their frequency range is from 25 to 50 MHz. Its engineering design was finished. The third one is 1 MW/VHF transmitter which was loaned from JAEA. As the operating ICRF frequency of KSTAR is lower, its cavity structure will be modified from 110 MHz to 60 MHz. The test results of 60 MHz and lessons from the high power test of 2 MW transmitter will be introduced and the circuit analysis and engineering design work for the second and third amplifiers will be shown.
Kobayashi, Masaki*; Ishida, Yukiaki*; Hwang, J. I.*; Song, G. S.*; Takizawa, Masaru*; Fujimori, Atsushi; Takeda, Yukiharu; Okochi, Takuo*; Okane, Tetsuo; Saito, Yuji; et al.
Physical Review B, 79(20), p.205203_1 - 205203_5, 2009/05
Times Cited Count:7 Percentile:32.24(Materials Science, Multidisciplinary)Kobayashi, Masaki*; Hwang, J. I.*; Song, G.*; Oki, Yasuhiro*; Takizawa, Masaru*; Fujimori, Atsushi; Takeda, Yukiharu; Fujimori, Shinichi; Terai, Kota*; Okane, Tetsuo; et al.
Physical Review B, 78(15), p.155322_1 - 155322_4, 2008/10
Times Cited Count:6 Percentile:29.33(Materials Science, Multidisciplinary)Song, G.*; Kobayashi, Masaki*; Hwang, J. I.*; Kataoka, Takashi*; Takizawa, Masaru*; Fujimori, Atsushi; Okochi, Takuo; Takeda, Yukiharu; Okane, Tetsuo; Saito, Yuji; et al.
Japanese Journal of Applied Physics, 47(9), p.7113 - 7116, 2008/09
Times Cited Count:3 Percentile:14.15(Physics, Applied)Song, G.*; Kobayashi, Masaki*; Hwang, J. I.*; Kataoka, Takashi*; Takizawa, Masaru*; Fujimori, Atsushi; Okochi, Takuo; Takeda, Yukiharu; Okane, Tetsuo; Saito, Yuji; et al.
Physical Review B, 78(3), p.033304_1 - 033304_4, 2008/07
Times Cited Count:8 Percentile:36.18(Materials Science, Multidisciplinary)Kobayashi, Masaki*; Ishida, Yukiaki*; Hwang, J. I.*; Song, G. S.*; Fujimori, Atsushi; Yang, C. S.*; Lee, L.*; Lin, H.-J.*; Huang, D.-J.*; Chen, C. T.*; et al.
New Journal of Physics (Internet), 10, p.055011_1 - 055011_15, 2008/05
Times Cited Count:16 Percentile:65.22(Physics, Multidisciplinary)Kim, K. Y.*; Hwang, Y. S.*; Park, J.-G.*; Torikai, Naoya*; Takeda, Masayasu; Han, S. W.*; Shin, S. C.*
Physica Status Solidi (B), 244(12), p.4499 - 4502, 2007/12
Times Cited Count:1 Percentile:6.36(Physics, Condensed Matter)We have investigated the effect of the field cooling on the exchange bias and the coercivity in an exchange-biased Fe/Cr(100) bilayer using SQUID magnetometer. After the field cooling, magnetization shifted upwards, indicative of surplus magnetic moments, which could be interpreted as an evidence of pinned and uncompensated Cr magnetic moments induced by the cooling field. Interestingly enough, we also discovered that not all the pinned and uncompensated spins seem to be involved in producing the exchange bias, although they contribute to increasing the coercivity and inducing the surplus magnetization.
Kasahara, Seiji; Hwang, G.*; Nakajima, Hayato; Choi, H.*; Onuki, Kaoru; Nomura, Mikihiro
Journal of Chemical Engineering of Japan, 36(7), p.887 - 899, 2003/07
Times Cited Count:69 Percentile:88.15(Engineering, Chemical)Thermal efficiency of the IS thermochemical hydrogen production process was evaluated. Sensitivities of operation conditions (HI conversion ratio, pressure and reflux ratio at HI distillation and concentration of HI after EED) and nonidealities of the process (electric energy loss in EED, loss at heat exchangers and loss of waste heat recovery as electricity) were investigated. Concentration of HI after EED had the most significant effect of 13.3 % on thermal efficiency in operation conditions. Nonidealities had importance on thermal efficiency. Thermal efficiency was 56.8 % with optimized operation conditions and no nonidealities.
Hwang, G.*; Kim, J.*; Choi, H.*; Onuki, Kaoru
Journal of Membrane Science, 215(1-2), p.293 - 302, 2003/04
Times Cited Count:16 Percentile:55.84(Engineering, Chemical)no abstracts in English
Arifal; Hwang, G.; Onuki, Kaoru
Journal of Membrane Science, 210(1), p.39 - 44, 2002/12
Times Cited Count:20 Percentile:60.50(Engineering, Chemical)no abstracts in English
Kang, J.-S.*; Kim, J. H.*; Sekiyama, Akira*; Kasai, Shuichi*; Suga, Shigemasa*; Han, S. W.*; Kim, K. H.*; Muro, Takayuki*; Saito, Yuji; Hwang, C.*; et al.
Physical Review B, 66(11), p.113105_1 - 113105_4, 2002/09
Times Cited Count:65 Percentile:89.91(Materials Science, Multidisciplinary)The electronic structures of SrFeMoO
(SFMO) and Ba
FeMoO
(BFMO) double perovskites have been investigated using Fe 2p-3d resonant photoemission spectroscopy (PES) and the Cooper minimum in the Mo 4d photoionization cross section. The states close to the Fermi level are found to have a strongly mixed Mo–Fe t
character, indicating that the Fe valence is far from pure 3+. The Fe 2p
x-ray absorption spectroscopy spectra reveal the mixed-valent Fe
–Fe
configurations, and a larger Fe
component for BFMO than for SFMO, suggesting an operative double exchange interaction. The valence-band PES spectra reveal good agreement with the local-spin-density-approximation (LSDA+U) calculation.
Hwang, G.; Onuki, Kaoru
Journal of Membrane Science, 194(2), p.207 - 215, 2001/12
Times Cited Count:62 Percentile:87.18(Engineering, Chemical)no abstracts in English
Onuki, Kaoru; Hwang, G.; Shimizu, Saburo
Journal of Membrane Science, 175(1), p.171 - 179, 2000/07
no abstracts in English
Hwang, G.; Onuki, Kaoru; Shimizu, Saburo
AIChE Journal, 46(1), p.92 - 98, 2000/01
Times Cited Count:38 Percentile:77.12(Engineering, Chemical)no abstracts in English
Hwang, G.*; Onuki, Kaoru; Shimizu, Saburo;
J. Membr. Sci., 162(1-2), p.83 - 90, 1999/00
Times Cited Count:67 Percentile:90.01(Engineering, Chemical)no abstracts in English
Onuki, Kaoru; Hwang, G.; Shimizu, Saburo
Maku Shimpojium '99 Hobunshu, (11), p.37 - 40, 1999/00
no abstracts in English
Hwang, G.*; Onuki, Kaoru; Shimizu, Saburo
JAERI-Research 98-002, 8 Pages, 1998/01
no abstracts in English