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magnetic Sensorless Control of Plasma Position and Shape in a Tokamak

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Plasma Science and Technology 2006年第1期8卷 80-83页

作者： K.NAKAmURA 罗家融王华忠季振山王华王枫齐娜 K.N.SATO K.HANADA m.SAKAmOTO H.IDEI m.hasegawa S.KAWASAKI H.NAKASHImA A.HIGASHIJImA Research Institute for Applied mechanics Kyushu UniversityFukuoka816-8580Japan Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China Interdisciplinary Graduate School of Engineering Sciences Kyushu UniversityFukuoka816-8580Japan

magnetic sensorless sensing and control experiments with the plasma horizontal position have been carried out in the superconducting tokamak HT-7. The sensing is made to focus on the ripple frequency component of the power supply with thyristor and directly from them without time integration. There is no drift problem with the integrator of wagnetic sensors. Two kinds of control experiments have been carried out： to keep the position constant and swing the position in a triangular waveform, And magnetic sensorless sensing of plasma shape is discussed.

关键词： sensorless control drift problem HT-7 shape control EAST

magnetic Sensorless Sensing of Plasma Position in the Superconducting Tokamak HT-7

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Plasma Science and Technology 2004年第5期6卷 2459-2462页

作者： K.Nakamura Z.S.Ji B.Shen P.J.Qin S.Itoh K.Hanada m.Sakamoto E.Jotaki m.hasegawa A.Iyomasa S.Kawasaki H.Nakashima Research Institute for Applied mechanics Kyushu University 6-1 Kasuga-koen Kasuga City Fukuoka 816-8580 JapanInstitute of Plasma Physics Chinese Academy of Sciences Hefei 230031 ChinaInstitute of Plasma Physics Chinese Academy of Sciences Hefei 230031 ChinaInstitute of Plasma Physics Chinese Academy of Sciences Hefei 230031 ChinaResearch Institute for Applied Mechanics Kyushu University 6-1 Kasuga-koen Kasuga City Fukuoka 816-8580 JapanResearch Institute for Applied Mechanics Kyushu University 6-1 Kasuga-koen Kasuga City Fukuoka 816-8580 JapanResearch Institute for Applied Mechanics Kyushu University 6-1 Kasuga-koen Kasuga City Fukuoka 816-8580 JapanInstitute of Plasma Physics Chinese Academy of Sciences Hefei 230031 ChinaResearch Institute for Applied Mechanics Kyushu University 6-1 Kasuga-koen Kasuga City Fukuoka 816-8580 JapanResearch Institute for Applied Mechanics Kyushu University 6-1 Kasuga-koen Kasuga City Fukuoka 816-8580 JapanResearch Institute for Applied Mechanics Kyushu University 6-1 Kasuga-koen Kasuga City Fukuoka 816-8580 JapanResearch Institute for Applied Mechanics Kyushu University 6-1 Kasuga-koen Kasuga City Fukuoka 816-8580 Japan

magnetic sensorless sensing experiments of the plasma horizontal positionhave been carried out in the superconducting tokamak HT-7. The horizontal position is calculatedfrom the vertical field coil current and voltage without using signals of magnetic probes placednearby a plasma. The calculations are focused on the ripple frequency component of the power *** is no drift problem with the time integration of magnetic probe signals. The error of thederived plasma position is lower than 2% of the plasma minor radius.

关键词： sensorless sensing plasma position HT-7

Power Balance Estimation in Long Duration Discharges on QUEST

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Plasma Science and Technology 2016年第11期18卷 1069-1075页

作者： K.HANADA H.ZUSHI H.IDEI K.NAKAmURA m.ISHIGURO S.TASHImA E.I.KALINNIKOVA Y.NAGASHImA m.hasegawa A.FUJISAWA A.HIGASHIJImA S.KAWASAKI H.NAKASHImA O.mITARAI A.FUKUYAmA Y.TAKASE X.GAO H.LIU J.QIAN m.ONO R.RAmAN Research Institute for Applied mechanics Kyushu UniversityFukuoka 816-8580Japan Interdisciplinary Graduate School of Engineering Science Kyushu UniversityFukuoka 816-8580Japan School of Industrial Engineering Tokai UniversityKumamoto 862-8652Japan Graduate School of Technology Kyoto UniversityKyoto 615-8530Japan Graduate School of Frontier Science University of TokyoChiba 277-8561Japan Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China Princeton Plasma Physics Laboratory Princeton NJ 08540USA SAeronautics&Astronautics University of WashingtonSeattle WA 98195-2400USA

Fully non-inductive plasma start-up was successfully achieved by using a well- controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%-90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. The power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.

关键词： steady state operation spherical tokamak plasma wall interaction power balance

Two Dimensional Density FlUCtuation measurements During the Non-Inductive Current Ramp-up Phase in the Compact Plasma Wall Interaction Experimental Device CPD

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Plasma Science and Technology 2009年第4期11卷 397-401页

作者： H.ZUSHI T.RYOUKAI K.KIKUKAWA T.mORISAKI R.BHATTACHARYAY T.YOSHINAGA K.HANADA T.SAKImURA H.IDEI K.DONO N.NISHINO H.HONmA S.TASHImA T.mUTOH S.KUBO K.NAGASAKI m.SAKAmOTO Y.NAKASHImA Y.HIGASHIZONO K.N.SATO K.NAKAmURA m.hasegawa S.KAWASAKI H.NAKASHImA A.HIGASHIJImA RIAm Kyushu University IGSES Kyushu University National Institute for Fusion Science Hiroshima University Kyoto University University of Tsukuba

Two-dimensional structure of density fluctuations is examined during the current jump phase, indicating a change from the open magnetic fields to the closed ones. During the smooth current ramp-up phase the two-dimensional contour of the LiI intensity shows vertically alignment, consistent with the magnetic surfaces. At the inflection point in Ip ramp-up the LiI intensity contour becomes flat in the observation regime and then suddenly a steep gradient and higher intensity regime are formed in the vertical direction. This higher intensity corresponds to a burst of LiI waveform. According to these changes in the contour, it is found that, within ~1 ms around the burst of LiI, a low frequency coherent wave with a long wavelength rapidly grows. The relations with other signals （magnetic flux and microwave stray power） are discussed with respect to the topological change in the magnetic configuration and mode conversion of the incident electromagnetic waves.

关键词： Li sheet beam density fluctuations current ramp-up spherical tokamak

钆特醇和钆贝葡胺在人体组织中钆滞留和清除的比较

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国际医学放射学杂志 2021年第6期 729-729页

作者： m.Kobayashi S.R.Levendovszky D.S.Hippe m.hasegawa N.murata K.murata 万怡轩朱冬勇

线性钆对比剂(GBCA)的钆含量高于大环GBCA。然而,关于它们的相对清除率和滞留分数知之甚少。目的对仅注射钆特醇(大环GBCA)或钆钡葡胺(线性GBCA)对比剂

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5种低渗非离子碘对比剂的急性不良反应有何不同?

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国际医学放射学杂志 2010年第5期 496-496页

作者： T.Gomi m.Nagamoto m.hasegawa A.Katoh m.Sugiyama N.murata 陈柱 Department of Radiology Toho University Ohashi Medical Center

A technique utilizing chemical reagents for direct measurement of temperature at a local area and its engineering applications

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Acta mechanica Sinica 2009年第2期25卷 149-160页

作者： m.Saka T.hasegawa Department of Nanomechanics Tohoku University

Temperature is one of the physical quantifies through which quantitative evaluation of the safety and reliability of industrial products can be achieved, and this has been used widely in practice. Under any environmental condifion, regardless of the size of the object to be inspected, accurate and reliable measurement of temperature is of great practical importance. This review article presents a simple and direct method of temperature measurement, that can be applied to the local areas with difficulty in measuring the temperature by using normal thermometers. In the present article, two different application examples are demonstrated. One addresses the study of the electromigration of solders which are used as bonding metals in electronic devices （micro-structures）. The application of the method to the shaft of a motor used in heavy industrial fields is explained as the second.

关键词： Temperature measurement Chemicalreagents melting point Temperature distribution

Practical Use of Transient Elastography in Screening for Nonalcoholic Steatohepatitis in a Japanese Population

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Journal of Clinical and Translational Hepatology 2019年第2期7卷 127-131页

作者： Haruka Hirono Kazuhiko Watanabe Katsuhiko hasegawa Shogo Ohkoshi Department of Internal medicine The Nippon Dental University School of Life Dentistry at NiigataChuo-kuNiigataJapan

Background and Aims:Fatty infiltration of liver may induce insulin resistance(IR),and a proportion of patients with nonalcoholic fatty liver disease(NAFLD)is diagnosed with nonalcoholic *** elastography is gaining popularity as a means of non-invasively determining both liver stiffness(fibrosis level)and degree of fatty infiltration,expressed as controlled attenuation parameter(CAP)***:The aims of this study were to investigate the association between IR and level of fatty liver,and to identify the group at a greater risk of nonalcoholic steatohepatitis using transient elastography and other noninvasive fibrosis markers.A total of 169 patients without chronic hepatitis B and C were ***:The CAP value was significantly associated with IR(HOmA-IR≥2.5;AUROC=0.81),and the optimal cut-off to discriminate IR was 264 dB/*** liver stiffness measurement and aspartate aminotransferase-to-platelet ratio index values were significantly higher for CAP≥264 than in CAPmong the overall 169 patients(5.3%)and among the 102 NAFLD patients(8.8%)who showed≥264 dB and≥7.0 kPa in transient elastography could represent good candidates for liver ***:Evaluation of NAFLD based on CAP values was useful in diagnosing *** 9%of NAFLD patients in a Japanese outpatient clinic with a few metabolic complications might be considered good candidates for liver biopsy to confirm nonalcoholic steatohepatitis.

关键词： NAFLD Insulin resistance NASH Transient elastography CAP Fibrosis marker

The First mesozoic Heterodactyl Bird from China

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Acta Geologica Sinica(English Edition) 2006年第5期80卷 631-635页

作者： ZHANG Zihui HOU Lianhai hasegawa Yoshikasu Jingmai O＇CONNOR Larry D. mARTIN Luis m. CHIAPPE College of Life Sciences Capital Normal University Beijing 100037 China Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Science P.O. Box 643 Beijing 100044 China Gunma museum of Natural History 1674-1 Kamikuroiwa Tomioka Gunma 370-2345 Japan Natural History museum of Los Angeles County 900 Exposition Boulevard Los Angeles CA 90007 USA University of Southern California Los Angeles CA 90007 USA Natural History museum and the Department of Ecology and Evolutionary Biology University of Kansas Lawrence KS 66045 USA

Dalingheornis liweii gen. et sp. nov., a new enantiornithine bird was collected from the early Cretaceous Yixian Formation in northeastern China. It is the first record of a highly specialized heterodactyl foot in mesozoic birds. The Y-shaped furcula with short hypocleidum is different from that of other enantiornithines. The minor metacarpal is robust and longer than the major metacarpal. A long bony tail composed of 20 caudal vertebrae with chevrons resembling those of dromaeosaurids and thus, highlighting again the evolutionary relationship between birds and non-avian theropods. Well-preserved alula feathers and a heterodactyl foot provide strong evidence for the arboreal habit of Dalingheornis.

关键词： Early Cretaceous heterodactyl enantiornithine Dalingheornis liweii China