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Magnetic sensorless sensing of Plasma Position in the superconducting Tokamak HT-7

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

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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

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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

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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

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Development of the CCD-Based UCN Detector with Fine spatial Resolution

Development of the CCD-Based UCN Detector with Fine Spatial ...

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作者： Y.Kamiya s.kawasaki G.Ichikawa s.sonoda s.Komamiya M.Hino M.Kitaguchi T.sanuki ICEPP The University of Tokyo Graduate school of science The University of Tokyo Graduate school of science Tohoku University

INTRODUCTION:Quantum mechanics says that gravitational interactions can bind particles in the quantized energy levels as well as electromagnetic and strong ***,a few of experiments to observe such levels were carried and the conclusive result have not been derived ***-cold neutrons(UCNs) have lower kinetic energy than Fermi potentials of general *** they can be bound by the earth’s

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Media Preference, Information Needs, and the Language Proficiency of Foreigners in Japan after the 2011 Great East Japan Earthquake

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International Journal of Disaster Risk science 2018年第1期9卷 1-15页

作者： Akiyuki kawasaki Michael Henry Kimiro Meguro Department of Civil Engineering The University of Tokyo Division of Field Engineering for the Environment Faculty of Engineering Hokkaido University International Center for Urban safety Engineering Institute of Industrial Science The University of Tokyo

After the 2011 Great East Japan Earthquake, the Japanese government identified the lack of proficiency in the Japanese language as one characteristic of foreigners that should be considered in disaster prevention *** article seeks to understand how proficiency in a local language affects disaster information gathering behavior by using the results of a questionnaire survey conducted after the 2011 Great East Japan Earthquake. Respondents were categorized based on their Japanese and English language abilities. Their media mode, language preferences, information importance, and information-gathering difficulties also were examined. It was found that foreigners skilled in Japanese demonstrated similar information gathering behavior as Japanese respondents, but foreigners unskilled in Japanese showed little usage of Japanese-language media. This group also encountered difficulties due to a lack of Japanese proficiency, but many members were able to acquire some level of Japanese-language information through Internet-based methods. To address language proficiency in disaster prevention planning, information provision in languages other than Japanese should be increased, and Japanese information should be shared in a way that facilitates translation. Although this survey wassignificant in its scope, the results should be considered within the limitations of the Internet-based response collection and focus only on the less-affected area of Japan.

关键词： 2011 Great East Japan Earthquake Disaster information Foreign population Internet-based media Language proficiency

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Hemodynamic Profiling Using a Cardiac Index–systemic Vascular Resistance Plot in Patients with Fontan Circulation

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Congenital Heart Disease 2023年第4期18卷 431-445页

作者： Yuki kawasaki Takeshi sasaki Daisuke Kobayashi Division of Pediatric Cardiology Osaka City General Hospital Pediatric Medical CenterOsaka5340021Japan Division of Cardiology St.Louis Children’s HospitalDepartment of PediatricsWashington University in St.LouisSt.LouisMO 63130USA

Background: Elevated Fontan pressure (FP) alone cannot fully predict clinical outcomes. We hypothesized thathemodynamic profiling using a cardiac index (CI)-systemic vascular resistance (sVR) plot could characterize clinicalfeatures and predict the prognosis of post-Fontan patients. Methods: We included post-Fontan patients whounderwent cardiac catheterization at age s. Patients were classified into four categories: A, CI ≥ 3, sVRindex (sVRI) ≥ 20;B, CI sVRI ≥ 20;C, CI ≥ 3, sVRI sVRI sfreedom from the combined endpoint: new onset of protein-losing enteropathy or plastic bronchitis, heart transplant,and death. Clinical and hemodynamic variables and freedom from the endpoint were compared betweenthe hemodynamic categories and outcome predictors were evaluated. Results: Eighty-three patients wereincluded. Median follow-up was 5.3 years. Category A/B/C/D consisted of 4/15/53/11 patients, respectively. Allthe patients in category A were New York Heart Association I/II and had a significantly lower pulmonary vascularresistance index (PVRI). Patients in category C had lower pulmonary/systemic blood flow. Patients in category Dhad a higher PVRI and had the poorest freedom from the endpoint (44% at 5 years). Elevated FP and category Dwere outcome predictors. Conclusions: CI-sVR plots was a novel adjunctive method for Fontan hemodynamicprofiling.

关键词： Cardiac index systemic vascular resistance perfusion pressure hemodynamic category fontan circulation prognosis

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Micronization of curcumin with biodegradable polymer by supercritical anti-solvent using micro swirl mixer

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Frontiers of Chemical science and Engineering 2018年第1期12卷 184-193页

作者： Kimthet Chhouk Wahyudiono Hideki Kanda shin-Ichro kawasaki Motonobu Goto Department of Chemical Engineering Nagoya University Nagoya 464-8603 Japan Department of Chemical Engineering and Food Technology Institute of Technology of Cambodia Phnom Penh Cambodia Department of Materials Process Engineering Nagoya University Nagoya 464-8603 Japan Research Institute for Chemical Engineering Process Technology National Institute of Advanced Industrial Science and Technology Sendai 983-8551 Japan

Curcumin is a hydrophobic polyphenol compound exhibiting a wide range of biological activities such as anti-inflammatory, anti-bacterial, anti-fungal, anti-carcinogenic, anti-human immunodeficiency virus, and antimicrobial activity. In this employed to produce the work, a swirl mixer was micronized curcumin with polyvinylpyrrolidone （PVP） by the supercritical antisolvent process to improve the bioavailability of curcumin. The effects of operating parameters such as curcumin/PVP ratio, feed concentration, temperature, pressure, and CO2 flow rate were investigated. The characterization and solubility of particles were determined by using scanning electron microscopy, Fourier Transform Infrared spectroscopy, and ultra-violet-visible spectroscopy. The result shows that the optimal condition for the production of curcumin/PVP particles is at curcumin/PVP ratio of 1：30, feed concentration of 5 mg·mL^-1, temperature of 40 ℃, pressure of 15 MPa, and CO2 flow rate of 15 mL·min^-1. Moreover, the dissolution of curcumin/PVP particles is faster than that of raw curcumin.

关键词： micronization curcumin polyvinylpyrrolidone supercritical anti-solvent swirl mixer

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Rubber–ice friction

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Friction 2023年第8期11卷 1534-1543页

作者： Toshi TADA satoshi kawasaki Ryouske sHIMIZU Bo N.J.PERssON sumitomo Rubber Industries Ltd.Material Research&Development HQ.2-1-1Kobe 651-0071Japan Peter Grünberg Institute(PGI-1) Forschungszentrum JülichJülich 52425Germany MultiscaleConsulting Jülich 52428Germany

We study the friction when a rectangular tire tread rubber block is sliding on an ice surface at different temperatures ranging from−38 to−2℃,and sliding speeds ranging from 3μm/s to 1 cm/*** low temperatures and low sliding speeds we propose that an important contribution to the friction force is due to slip between the ice surface and ice fragments attached to the rubber *** temperatures above−10℃ or for high enough sliding speeds,a thin premelted water film occurs on the ice surface and the contribution to the friction from shearing the area of real contact is *** this case the dominant contribution to the friction force comes from viscoelastic deformations of the rubber by the ice *** comment on the role of waxing on the friction between skis and snow(ice particles).

关键词： ice friction rubber friction ice premelting

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Rapid Construction of a High-Density Rice Linkage Map by High Efficiency Genome scanning (HEGs) system

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Rice science 2009年第4期16卷 247-247,J0001,248-253页

作者： Akifumi sHIMIZU shinji kawasaki National Institute of Agrobiological sciences Kannon-daiTsukubaIbarakiJapan school of Environmental science University of Shiga Prefecture

High-density linkage maps are essential tools for genome analysis of various biological traits. Our developed compact multi-gel system, HEGs （high efficiency genome scanning） is a high-throughput and high-cost-performance electrophoresis apparatus. Using this system, a high-density （average interval 2.3 cM） map with 1 065 AFLP and 63 ssR markers was constructed from recombinant inbred lines of a japonica and indica hybrid in just two months of electrophoreses by a single person. More than 50% of the mapped AFLP markers were commonly polymorphic for several combinations between japonica and indica rice and 15% were applicable for genetically closer crosses between upland and lowland types of japonica rice. This system can be used for rapid analyses of all kinds of markers.

关键词： rice high-density linkage map high efficiency genome scanning system

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