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3. Impact of multifold magnetic structure on spectroscopy analysis in Heliotron J based on EMC3‐EIRENE simulation

Author

Cai, F., primary, Kado, S., additional, Kawamura, G., additional, Feng, C., additional, Matoike, R., additional, Miyashita, A., additional, Ohshima, S., additional, Minami, T., additional, Inagaki, S., additional, Kin, F., additional, Kobayashi, S., additional, Ishizawa, A., additional, Nakamura, Y., additional, Okada, H., additional, Konoshima, S., additional, Mizuuchi, T., additional, Feng, Y., additional, Frerichs, H., additional, and Nagasaki, K., additional

Published
2024
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7. Preparatory study of feasibility for a vertical viewing electron cyclotron emission diagnostic for the JT-60SA tokamak.

Author

Tokuzawa, T., Yoshida, M., Imazawa, R., Nakagawa, S., Inagaki, S., Kin, F., Chiba, S., Suzuki, N., Nasu, T., Fujisawa, A., and Ida, K.

Subjects
BEAM optics, ELECTRON emission, FOCUS (Optics), DISTRIBUTION (Probability theory), ELECTRON distribution
Abstract

A preparatory study is underway to investigate the feasibility study of high-energetic, non-thermal electron distribution function measurements using a vertical-viewing electron cyclotron emission (ECE) diagnostic on JT-60SA. The system is designed to detect broad ECE spectra (70–260 GHz) due to the second, third, and fourth harmonics using a focusing optics system with four quasi-optical mirrors in the upper port of JT-60SA. A Gaussian beam optics design is performed in vacuum, and ray tracing calculations are performed in plasma using the TRAVIS code to investigate density characteristics. A ceramic viewing dump is also designed to reduce the effects of multiple reflections from the opposing vacuum vessel surface. [ABSTRACT FROM AUTHOR]

Published
2024
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9. The SWOT Mission Environmental Verification Program

Author

Man, Kin F

Abstract

The objective of the Surface Water and Ocean Topography (SWOT) Mission is to make global measurements of sea surface and terrestrial water heights. The SWOT Observatory consists of the Spacecraft Bus, supplied by CNES, and the Payload Module, provided by JPL. The Spacecraft Bus is a carrier of the Payload Module, which includes all the science instruments. The Spacecraft Bus components have been environmentally verified by CNES and the Payload Module components verified by JPL. The Payload Module was delivered to CNES in June 2021 for integration with the Spacecraft Bus to form the Observatory, which is in the process of undergoing a full set of environmental tests before launch. This paper focuses on the environmental test and analysis program at the assembly (unit), subsystem, and module level for the Payload Module hardware that JPL is responsible for verifying. Even though an Earth-orbiting mission like SWOT is not considered to be at extreme environments, SWOT’s environmental verification program does illustrate the standard System Integration and Test (SIT) process for hardware integration and environmental testing to ensure all hardware have been properly qualified to meet all mission environments. Typical space environmental test and analysis campaign includes acoustics vibration, shock, thermal vacuum, venting/pressure, radiation, electrostatic discharge, EMC/EMI/magnetics, and meteoroids. Environmental test and analysis metrics are presented in this paper. This paper also shows the complex integration process that involves multi-organizations and the latest status on the Observatory environmental test campaign.

Published
2022

14. Characterization of a retroreflector array for 320-GHz interferometer system in Heliotron J

Author

Zhang, P., primary, Ohshima, S., additional, Zhao, H., additional, Kobayashi, S., additional, Kado, S., additional, Minami, T., additional, Kin, F., additional, Miyashita, A., additional, Iwata, A., additional, Kondo, Y., additional, Qiu, D., additional, Wang, C., additional, Luo, M., additional, Konoshima, S., additional, Inagaki, S., additional, Okada, H., additional, Mizuuchi, T., additional, and Nagasaki, K., additional

Published
2023
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16. Topical minocycline formulations: Evaluation and comparison of dermal uptake efficacy

Author

Diana Lac, Maiko Hermsmeier, Xin Chen, Noymi Yam, Akira Yamamoto, Susan Huang, Tanvee Sawant, Kin F. Chan, and Usha Nagavarapu

Subjects
Pharmacy and materia medica, RS1-441
Abstract

Acne vulgaris is a clinically distinct skin condition with evidence suggesting that inflammation plays a critical role in the pathogenesis of this disorder. Treatment of severe inflammatory acne often involves the use of oral antibiotics, sometimes in combination with topical products. Oral antibiotics often result in systemic side effects and the risks of antibiotic resistance, but no commercial topical minocycline is currently available. We have developed a unique, stable, hydrophilic topical gel formulation with fully solubilized minocycline (MNC-H). Minocycline delivered in our hydrophilic gel remained more stable in situ, resulting in less degradation product (4-epiminocycline) than a lipophilic formulation (MNC-L). The hydrophilic nature of our formulation enabled 2–3 fold increase in delivery into the skin ex vivo compared to a lipophilic counterpart, mostly seen in the epidermis and pilosebaceous units. The lipophilic formulation also appeared to be more occlusive, resulting in higher sebum production in minipigs, which may exacerbate acne vulgaris. As our results indicate, a 1, 2% minocycline hydrophilic gel may deliver sufficient drug (>15 μg/g) to potentially demonstrate clinical efficacy. These findings suggest that topical hydrophilic minocycline gel may provide a novel tool for topical acne therapy. Keywords: Dermal, Anti-microbial, Anti-inflammatory, Tetracycline class, Transepidermal, Hydrophilicity, Acne, Skin

Published
2019
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17. Fractional deep dermal ablation induces tissue tightening

Author

Rahman, Zakia, MacFalls, Heather, Jiang, Kerrie, Chan, Kin F, Kelly, Kristen, Tournas, Joshua, Stumpp, Oliver F, Bedi, Vikramaditya, and Zachary, Christopher

Subjects
Biomedical and Clinical Sciences, Clinical Sciences, Clinical Research, Adult, Aged, Cosmetic Techniques, Dermatologic Surgical Procedures, Humans, Laser Therapy, Middle Aged, Pilot Projects, Skin Aging, fractional deep dermal ablation, ablative resurfacing, fractional photothermolysis, photodamage, CO2 laser, Dermatology & Venereal Diseases, Clinical sciences, Dentistry
Abstract

Background and objectiveDue to the significant risk profile associated with traditional ablative resurfacing, a safer and less invasive treatment approach known as fractional deep dermal ablation (FDDA) was recently developed. We report the results of the first clinical investigation of this modality for treatment of photodamaged skin.Study design/materials and methodsTwenty-four subjects received treatments on the inner forearm with a prototype fractional CO(2) laser device (Reliant Technologies Inc., Mountain View, CA) at settings of 5-40 mJ/MTZ and 400 MTZ/cm(2). Clinical and histological effects were assessed by study investigators 1 week, 1 month, and 3 months following treatment. Thirty subjects were then enrolled in a multi-center study for treatment of photodamage using the same device. Subjects received 1-2 treatments on the face and neck, with energies ranging from 10 to 40 mJ/MTZ and densities ranging from 400 to 1,200 MTZ/cm(2). Study investigators assessed severity of post-treatment responses during follow-up visits 48 hours, 1 week, 1 month, and 3 months following treatment. Using a standard quartile improvement scale (0-4), subjects and investigators assessed improvement in rhytides, pigmentation, texture, laxity and overall appearance 1 and 3 months post-treatment.ResultsClinical and histologic results demonstrated that fractional delivery of a 10,600 nm CO(2) laser source offers an improved safety profile with respect to traditional ablative resurfacing, while still effectively resurfacing epidermal and dermal tissue. Forearm and facial treatments were well-tolerated with no serious adverse events observed. Eighty-three percent of subjects exhibited moderate or better overall improvement (50-100%), according to study investigator quartile scoring.ConclusionsFDDA treatment is a safe and promising new approach for resurfacing of epidermal and deep dermal tissue targets.

Published
2009

19. Data from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Author

Cheng, Alfred S.L., primary, Lau, Suki S., primary, Chen, Yangchao, primary, Kondo, Yutaka, primary, Li, May S., primary, Feng, Hai, primary, Ching, Arthur K., primary, Cheung, Kin F., primary, Wong, Hoi K., primary, Tong, Joanna H., primary, Jin, Hongchuan, primary, Choy, Kwong W., primary, Yu, Jun, primary, To, Ka F., primary, Wong, Nathalie, primary, Huang, Tim H.-M., primary, and Sung, Joseph J.Y., primary

Published
2023
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20. Supplementary Table 7 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Author

Cheng, Alfred S.L., primary, Lau, Suki S., primary, Chen, Yangchao, primary, Kondo, Yutaka, primary, Li, May S., primary, Feng, Hai, primary, Ching, Arthur K., primary, Cheung, Kin F., primary, Wong, Hoi K., primary, Tong, Joanna H., primary, Jin, Hongchuan, primary, Choy, Kwong W., primary, Yu, Jun, primary, To, Ka F., primary, Wong, Nathalie, primary, Huang, Tim H.-M., primary, and Sung, Joseph J.Y., primary

Published
2023
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21. Supplementary Methods, Figures 1-9, Tables 2-6 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Author

Cheng, Alfred S.L., primary, Lau, Suki S., primary, Chen, Yangchao, primary, Kondo, Yutaka, primary, Li, May S., primary, Feng, Hai, primary, Ching, Arthur K., primary, Cheung, Kin F., primary, Wong, Hoi K., primary, Tong, Joanna H., primary, Jin, Hongchuan, primary, Choy, Kwong W., primary, Yu, Jun, primary, To, Ka F., primary, Wong, Nathalie, primary, Huang, Tim H.-M., primary, and Sung, Joseph J.Y., primary

Published
2023
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22. Supplementary Table 1 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Author

Cheng, Alfred S.L., primary, Lau, Suki S., primary, Chen, Yangchao, primary, Kondo, Yutaka, primary, Li, May S., primary, Feng, Hai, primary, Ching, Arthur K., primary, Cheung, Kin F., primary, Wong, Hoi K., primary, Tong, Joanna H., primary, Jin, Hongchuan, primary, Choy, Kwong W., primary, Yu, Jun, primary, To, Ka F., primary, Wong, Nathalie, primary, Huang, Tim H.-M., primary, and Sung, Joseph J.Y., primary

Published
2023
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24. Supplementary Table 7 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Author

Joseph J.Y. Sung, Tim H.-M. Huang, Nathalie Wong, Ka F. To, Jun Yu, Kwong W. Choy, Hongchuan Jin, Joanna H. Tong, Hoi K. Wong, Kin F. Cheung, Arthur K. Ching, Hai Feng, May S. Li, Yutaka Kondo, Yangchao Chen, Suki S. Lau, and Alfred S.L. Cheng

Abstract

Supplementary Table 7 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Published
2023

25. Supplementary Methods, Figures 1-9, Tables 2-6 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Author

Joseph J.Y. Sung, Tim H.-M. Huang, Nathalie Wong, Ka F. To, Jun Yu, Kwong W. Choy, Hongchuan Jin, Joanna H. Tong, Hoi K. Wong, Kin F. Cheung, Arthur K. Ching, Hai Feng, May S. Li, Yutaka Kondo, Yangchao Chen, Suki S. Lau, and Alfred S.L. Cheng

Abstract

Supplementary Methods, Figures 1-9, Tables 2-6 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Published
2023

26. Supplementary Table 1 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Author

Joseph J.Y. Sung, Tim H.-M. Huang, Nathalie Wong, Ka F. To, Jun Yu, Kwong W. Choy, Hongchuan Jin, Joanna H. Tong, Hoi K. Wong, Kin F. Cheung, Arthur K. Ching, Hai Feng, May S. Li, Yutaka Kondo, Yangchao Chen, Suki S. Lau, and Alfred S.L. Cheng

Abstract

Supplementary Table 1 from EZH2-Mediated Concordant Repression of Wnt Antagonists Promotes β-Catenin–Dependent Hepatocarcinogenesis

Published
2023

30. Discerning cyber threatening incidents from ordinary events using sentiment analysis and logistic regression.

Author

Ibrishimova, Marina D. and Li, Kin F.

Subjects
*SENTIMENT analysis, *LOGISTIC regression analysis, *INFORMATION technology security
Abstract

Many organizations allow incident reports from the general public. Some of these reports may contain information about threatening incidents, while others may describe ordinary events. Incident classification is the process of distinguishing between incidents and events. We describe an automated incident classification system, which uses logistic regression and sentiment analysis to estimate the likelihood that an event is an incident using its textual description. We trained and validated two different models on one dataset and used a different dataset for testing purposes. The model that performed better utilized sentiment analysis at the sentence level as well as at the level of individual verbs, nouns, and adjectives. It achieved 99% accuracy on the validation set and 100% accuracy on the test set over 50% baseline. Overall, we found that using sentiment score increased the model's accuracy, precision, and recall by at least 10% especially when it is applied on several levels of the text. The difference between our approach and the typical human approach is that in our approach we train the system to recognize incidents before any incident actually takes place and our system can recognize incidents even if their descriptions do not include keywords the system previously encountered. [ABSTRACT FROM AUTHOR]

Published
2023
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36. Heuristic Approaches to Service Level Agreements in Packet Networks

Author

Yu, Louis L., Manning, Eric G., Li, Kin F., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Deng, Xiaotie, editor, and Ye, Yinyu, editor

Published
2005
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37. A Formal Approach to Evaluate and Compare Internet Search Engines: A Case Study on Searching the Chinese Web

Author

Li, Kin F., Wang, Yali, Nishio, Shojiro, Yu, Wei, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Zhang, Yanchun, editor, Tanaka, Katsumi, editor, Yu, Jeffrey Xu, editor, Wang, Shan, editor, and Li, Minglu, editor

Published
2005
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38. Design and Experiment of Capacitive Micromachined Ultrasonic Transducer Array for High-frequency Underwater Imaging

Author

Shuang Zhang, Peng U. Mak, Sio H. Pun, Ching H. Cheng, Kin F. Lei, Mang I Vai, Weibao Qiu, Jiujiang Wang, Xin Liu, and Yuanyu Yu

Subjects
Materials science, Underwater imaging, Acoustics, Capacitive sensing, Ultrasonic transducer array, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials
Abstract

Background:: Ultrasound is widely used in the applications of underwater imaging. Capacitive micromachined ultrasonic transducer (CMUT) is a promising candidate for the traditional piezoelectric ultrasonic transducer. In underwater ultrasound imaging, better resolutions can be achieved with a higher frequency ultrasound. Therefore, a CMUT array for high-frequency ultrasound imaging is proposed in this work. Methods:: Analytical methods were used to calculate the center frequency in water and the pull-in voltage for determining the operating point of CMUT. A finite element method model was developed to finalize the design parameters. The CMUT array was fabricated with a five-mask sacrificial release process. Results:: The CMUT array owned an immersed center frequency of 2.6 MHz with a 6 dB fractional bandwidth of 123 %. The pull-in voltage of the CMUT array was 85 V. An underwater imaging experiment was carried out with the target of three steel wires. Conclusion:: In this study, we have developed CMUT for high-frequency underwater imaging. The experiment showed that the CMUT could detect the steel wires with a diameter of 100 μm and the axial resolution was 0.582 mm, which was close to one wavelength of ultrasound in 2.6 MHz

Published
2021

42. Building an adaptive multimedia system using the utility model

Author

Chen, Lei, Khan, Shahadat, Li, Kin F., Manning, Eric G., Goos, Gerhard, editor, Hartmanis, Juris, editor, van Leeuwen, Jan, editor, Rolim, José, editor, Mueller, Frank, editor, Zomaya, Albert Y., editor, Ercal, Fikret, editor, Olariu, Stephan, editor, Ravindran, Binoy, editor, Gustafsson, Jan, editor, Takada, Hiroaki, editor, Olsson, Ron, editor, Kale, Laxmikant V., editor, Beckman, Pete, editor, Haines, Matthew, editor, ElGindy, Hossam, editor, Caromel, Denis, editor, Chaumette, Serge, editor, Fox, Geoffrey, editor, Pan, Yi, editor, Li, Keqin, editor, Yang, Tao, editor, Chiola, G., editor, Conte, G., editor, Mancini, L. V., editor, Méry, Domenique, editor, Sanders, Beverly, editor, Bhatt, Devesh, editor, and Prasanna, Viktor, editor

Published
1999
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43. Modelling Framework and Assistive Device for Peripheral Intravenous Injections

Author

Kam Kin F., Robinson Martin P., Gilbert Mathew A., and Pelah Adar

Subjects
Needle insertion, Venepuncture, Venous cannulation, peripheral intravenous injection aid, medical device design process, human factors in medical devices, medical robotics, Engineering (General). Civil engineering (General), TA1-2040
Abstract

Intravenous access for blood sampling or drug administration that requires peripheral venepuncture is perhaps the most common invasive procedure practiced in hospitals, clinics and general practice surgeries.We describe an idealised mathematical framework for modelling the dynamics of the peripheral venepuncture process. Basic assumptions of the model are confirmed through motion analysis of needle trajectories during venepuncture, taken from video recordings of a skilled practitioner injecting into a practice kit. The framework is also applied to the design and construction of a proposed device for accurate needle guidance during venepuncture administration, assessed as consistent and repeatable in application and does not lead to over puncture. The study provides insights into the ubiquitous peripheral venepuncture process and may contribute to applications in training and in the design of new devices, including for use in robotic automation.

Published
2016
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44. Time-resolved fluorescence microscopy with phasor analysis for visualizing multicomponent topical drug distribution within human skin

Author

Kin F. Chan, Xin Chen, Akira Yamamoto, Sinyoung Jeong, Maiko Hermsmeier, Conor L. Evans, and Daniel A. Greenfield

Subjects
0301 basic medicine, Drug, Fluorescence-lifetime imaging microscopy, Administration, Topical, media_common.quotation_subject, Optical spectroscopy, lcsh:Medicine, Minocycline, Human skin, 01 natural sciences, Article, Fluorescence, 010309 optics, 03 medical and health sciences, Tazarotene, 0103 physical sciences, Image Processing, Computer-Assisted, medicine, Humans, Acne vulgaris, Pharmacokinetics, lcsh:Science, Skin, media_common, Active ingredient, Multidisciplinary, Chemistry, lcsh:R, Nicotinic Acids, Imaging and sensing, Molecular Imaging, 3. Good health, Drug Combinations, Autofluorescence, Spectrometry, Fluorescence, 030104 developmental biology, Microscopy, Fluorescence, Drug development, Face, Drug delivery, lcsh:Q, Dermatologic Agents, Gels, Algorithms, medicine.drug, Biomedical engineering
Abstract

Understanding a drug candidate’s pharmacokinetic (PK) parameters is a challenging but essential aspect of drug development. Investigating the penetration and distribution of a topical drug’s active pharmaceutical ingredient (API) allows for evaluating drug delivery and efficacy, which is necessary to ensure drug viability. A topical gel (BPX-05) was recently developed to treat moderate to severe acne vulgaris by directly delivering the combination of the topical antibiotic minocycline and the retinoid tazarotene to the pilosebaceous unit of the dermis. In order to evaluate the uptake of APIs within human facial skin and confirm accurate drug delivery, a selective visualization method to monitor and quantify local drug distributions within the skin was developed. This approach uses fluorescence lifetime imaging microscopy (FLIM) paired with a multicomponent phasor analysis algorithm to visualize drug localization. As minocycline and tazarotene have distinct fluorescence lifetimes from the lifetime of the skin’s autofluorescence, these two APIs are viable targets for distinct visualization via FLIM. Here, we demonstrate that the analysis of the resulting FLIM output can be used to determine local distributions of minocycline and tazarotene within the skin. This approach is generalizable and can be applied to many multicomponent fluorescence lifetime imaging targets that require cellular resolution and molecular specificity.

Published
2020

45. Imaging and quantifying drug delivery in skin – Part 2: Fluorescence andvibrational spectroscopic imaging methods

Author

Sinyoung Jeong, Philippe Hallegot, Conor L. Evans, Kin F. Chan, Peyman Obeidy, Ana-Maria Pena, Xueqin Chen, Amin Feizpour, Gustavo S. Luengo, Isaac J. Pence, Thomas Bornschlögl, and Sébastien Grégoire

Subjects
Materials science, Skin Absorption, Confocal, Pharmaceutical Science, Human skin, 02 engineering and technology, Models, Biological, Article, 03 medical and health sciences, Drug Delivery Systems, In vivo, Animals, Humans, Skin, 030304 developmental biology, 0303 health sciences, integumentary system, Spectrum Analysis, Optical Imaging, 021001 nanoscience & nanotechnology, Fluorescence, Drug development, Models, Animal, Drug delivery, Dermatologic Agents, 0210 nano-technology, Ex vivo, Biomedical engineering, Skin imaging
Abstract

Understanding the delivery and diffusion of topically-applied drugs on human skin is of paramount importance in both pharmaceutical and cosmetics research. This information is critical in early stages of drug development and allows the identification of the most promising ingredients delivered at optimal concentrations to their target skin compartments. Different skin imaging methods, invasive and non-invasive, are available to characterize and quantify the spatiotemporal distribution of a drug within ex vivo and in vivo human skin. The first part of this review detailed invasive imaging methods (autoradiography, MALDI and SIMS). This second part reviews non-invasive imaging methods that can be applied in vivo: i) fluorescence (conventional, confocal, and multiphoton) and second harmonic generation microscopies and ii) vibrational spectroscopic imaging methods (infrared, confocal Raman, and coherent Raman scattering microscopies). Finally, a flow chart for the selection of imaging methods is presented to guide human skin ex vivo and in vivo drug delivery studies.

Published
2020

49. Completion of JT-60SA construction and contribution to ITER

Author

Kamada Y., Di Pietro E., Hanada M., Barabaschi P., Ide S., Davis S., Yoshida M., Giruzzi G., Sozzi C., Abdel Maksoud W., Abe H., Aiba N., Akiyama T., Ayllon-Guerola J., Arai T., Artaud J. -F., Asakura N., Ashikawa N., Balbinot L., Bando T., Baulaigue O., Belonohy E., Bin W., Bombarda F., Bolzonella T., Bonne F., Bonotto M., Botija J., Cabrera-Perez S., Cardella A., Carraro L., Cavalier J., Chernyshova M., Chiba S., Clement-Lorenzo S., Cocilovo V., Coda S., Coelho R., Coffey I., Collin B., Corato V., Cucchiaro A., Czarski T., Dairaku M., Day C., de la Luna E., De Tommasi G., Decool P., Di Pace L., Dibon M., Disset G., Ejiri A., Endo Y., Ezumi N., Falchetto G., Fassina A., Fejoz P., Ferro A., Fietz W., Figini L., Fornal T., Frello G., Fujita T., Fukuda T., Fukui K., Fukumoto M., Furukawa M., Futatani S., Gabellieri L., Gaio E., Galazka K., Garcia J., Garcia-Dominguez J., Garcia-Lopez J., Garcia-Munoz M., Garzotti L., Gasparini F., Gharafi S., Giacomelli L., Ginoulhiac G., Giudicotti L., Guillen Gonzalez R., Hajnal N., Hall S., Hamada K., Hanada K., Hasegawa K., Hatae T., Hatakeyama S., Hauer V., Hayashi N., Hayashi T., Heller R., Higashijima S., Hinata J., Hiranai S., Hiratsuka J., Hiwatari R., Hoa C., Homma H., Honda A., Honda M., Horiike H., Hoshino K., Hurzlmeier H., Iafrati M., Ibano K., Ichige H., Ichikawa M., Ichimura M., Ida K., Idei H., Iijima T., Iio S., Ikeda R., Ikeda Y., Imai T., Imazawa R., Inagaki S., Inomoto M., Inoue S., Isayama A., Ishida S., Ishii Y., Isobe M., Janky F., Joffrin E., Jokinen A., Kado S., Kajita S., Kajiwara K., Kamata I., Kaminaga A., Kamiya K., Kanapienyte D., Kashiwa Y., Kashiwagi M., Katayama K., Kawamata Y., Kawamura G., Kawano K., Kawashima H., Kin F., Kitajima S., Kiyono K., Kizu K., Kobayashi K., Kobayashi M., Kobayashi S., Kobayashi T., Kocsis G., Koide Yo., Koide Yu., Kojima A., Kokusen S., Komuro K., Konishi S., Kovacsik A., Ksiazek I., Kubkowska M., Kuhner G., Kuramochi M., Kurihara K., Kurki-Suonio T., Kurniawan A. B., Kuwata T., Lacroix B., Lamaison V., Lampasi A., Lang P., Lauber P., Lawson K., Louzguiti A., Maekawa R., Maekawa T., Maeyama S., Maffia G., Maget P., Mailloux J., Maione I., Maistrello A., Malinowski K., Marchiori G., Marechal J. -L., Massaut V., Masuzaki S., Matsunaga G., Matsunaga S., Mayri Ch., Mattei M., Medrano M., Mele A., Meyer I., Michel F., Minami T., Miyata Y., Miyazawa J., Miyo Y., Mizuuchi T., Mogaki K., Morales J., Moreau P., Mori M., Morisaki T., Morishima S., Moriyama S., Moro A., Murakami H., Murayama M., Murakami S., Nagasaki K., Naito O., Nakamura S., Nakano T., Nakashima Y., Nardino V., Narita E., Narushima Y., Natsume K., Nemoto S., Neu R., Nicollet S., Nishikawa M., Nishimura S., Nishiura M., Nishiyama T., Nocente M., Nobuta Y., Novello L., Nunio F., Ochoa S., Ogawa T., Ogawa Y., Ohdachi S., Ohmori Y., Ohno N., Ohtani Y., Ohzeki M., Oishi T., Okano F., Okano J., Okano K., Onishi Y., Osakabe M., Oshima T., Ostuni V., Oya M., Oya Y., Oyama N., Ozeki T., Pasqualotto R., Pelli S., Peretti E., Phillips G., Piccinni C., Pigatto L., Pironti A., Pizzuto A., Plockl B., Polli G., Poncet J. -M., Ponsot P., Puiatti M., Radloff D., Raimondi V., Ramos F., Rancsik P., Ricci D., Ricciarini S., Rincon E., Romano A., Rossi P., Roussel P., Rubino G., Saeki H., Sagara A., Sakakibara S., Sakamoto H., Sakamoto M., Sakamoto Y., Sakasai A., Sakata S., Sakuma T., Sakurai S., Salanon B., Salmi A., Sannazzaro G., Sano R., Sanpei A., Sasajima T., Sasaki S., Sasao H., Sato F., Sato M., Sawahata M., Scherber A., Scully S., Seki M., Seki S., Shibama Y., Shibata Y., Shikama T., Shimada K., Shimono M., Shinde J., Shinya T., Shinohara K., Shirai H., Shiraishi J., Soare S., Soleto A., Someya Y., Streciwilk-Kowalska E., Strobel H., Sueoka M., Sukegawa A., Sulistyanintyas D., Sumida S., Sunaoshi H., Suzuki H., Suzuki M., Suzuki S., Suzuki T., Suzuki Y., Svoboda J., Szabolics T., Szepesi T., Takahashi K., Takase Y., Takechi M., Takeda K., Takeiri Y., Takenaga H., Taliercio C., Tamura N., Tanaka H., Tanaka K., Tani K., Tanigawa H., Tardocchi M., Terakado A., Terakado M., Terakado T., Teuchner B., Tilia B., Tobita K., Toi K., Toida N., Tojo H., Tokitani M., Tokuzawa T., Tormarchio V., Tomine M., Torre A., Totsuka T., Tsuchiya K., Tsujii N., Tsuru D., Tsutsui H., Uchida M., Ueda Y., Uno J., Urano H., Usui K., Utoh H., Valisa M., Vallar M., Vallcorba-Carbonell R., Vallet J. -C., Varela J., Vega J., Verrecchia M., Vieillard L., Villone F., Vincenzi P., Wada K., Wada R., Wakatsuki T., Wanner M., Watanabe F., Watanabe K., Wauters T., Wiesen S., Wischmeier M., Yagi M., Yagyu J., Yajima M., Yokooka S., Yokoyama M., Yamamoto S., Yamanaka H., Yamauchi K., Yamauchi Y., Yamazaki H., Yamazaki K., Yamazaki R., Yamoto S., Yanagi S., Yanagihara K., Yoshizawa N., Zani L., Zito P., Kamada, Y., Di Pietro, E., Hanada, M., Barabaschi, P., Ide, S., Davis, S., Yoshida, M., Giruzzi, G., Sozzi, C., Abdel Maksoud, W., Abe, H., Aiba, N., Akiyama, T., Ayllon-Guerola, J., Arai, T., Artaud, J. -F., Asakura, N., Ashikawa, N., Balbinot, L., Bando, T., Baulaigue, O., Belonohy, E., Bin, W., Bombarda, F., Bolzonella, T., Bonne, F., Bonotto, M., Botija, J., Cabrera-Perez, S., Cardella, A., Carraro, L., Cavalier, J., Chernyshova, M., Chiba, S., Clement-Lorenzo, S., Cocilovo, V., Coda, S., Coelho, R., Coffey, I., Collin, B., Corato, V., Cucchiaro, A., Czarski, T., Dairaku, M., Day, C., de la Luna, E., De Tommasi, G., Decool, P., Di Pace, L., Dibon, M., Disset, G., Ejiri, A., Endo, Y., Ezumi, N., Falchetto, G., Fassina, A., Fejoz, P., Ferro, A., Fietz, W., Figini, L., Fornal, T., Frello, G., Fujita, T., Fukuda, T., Fukui, K., Fukumoto, M., Furukawa, M., Futatani, S., Gabellieri, L., Gaio, E., Galazka, K., Garcia, J., Garcia-Dominguez, J., Garcia-Lopez, J., Garcia-Munoz, M., Garzotti, L., Gasparini, F., Gharafi, S., Giacomelli, L., Ginoulhiac, G., Giudicotti, L., Guillen Gonzalez, R., Hajnal, N., Hall, S., Hamada, K., Hanada, K., Hasegawa, K., Hatae, T., Hatakeyama, S., Hauer, V., Hayashi, N., Hayashi, T., Heller, R., Higashijima, S., Hinata, J., Hiranai, S., Hiratsuka, J., Hiwatari, R., Hoa, C., Homma, H., Honda, A., Honda, M., Horiike, H., Hoshino, K., Hurzlmeier, H., Iafrati, M., Ibano, K., Ichige, H., Ichikawa, M., Ichimura, M., Ida, K., Idei, H., Iijima, T., Iio, S., Ikeda, R., Ikeda, Y., Imai, T., Imazawa, R., Inagaki, S., Inomoto, M., Inoue, S., Isayama, A., Ishida, S., Ishii, Y., Isobe, M., Janky, F., Joffrin, E., Jokinen, A., Kado, S., Kajita, S., Kajiwara, K., Kamata, I., Kaminaga, A., Kamiya, K., Kanapienyte, D., Kashiwa, Y., Kashiwagi, M., Katayama, K., Kawamata, Y., Kawamura, G., Kawano, K., Kawashima, H., Kin, F., Kitajima, S., Kiyono, K., Kizu, K., Kobayashi, K., Kobayashi, M., Kobayashi, S., Kobayashi, T., Kocsis, G., Koide, Yo., Koide, Yu., Kojima, A., Kokusen, S., Komuro, K., Konishi, S., Kovacsik, A., Ksiazek, I., Kubkowska, M., Kuhner, G., Kuramochi, M., Kurihara, K., Kurki-Suonio, T., Kurniawan, A. B., Kuwata, T., Lacroix, B., Lamaison, V., Lampasi, A., Lang, P., Lauber, P., Lawson, K., Louzguiti, A., Maekawa, R., Maekawa, T., Maeyama, S., Maffia, G., Maget, P., Mailloux, J., Maione, I., Maistrello, A., Malinowski, K., Marchiori, G., Marechal, J. -L., Massaut, V., Masuzaki, S., Matsunaga, G., Matsunaga, S., Mayri, Ch., Mattei, M., Medrano, M., Mele, A., Meyer, I., Michel, F., Minami, T., Miyata, Y., Miyazawa, J., Miyo, Y., Mizuuchi, T., Mogaki, K., Morales, J., Moreau, P., Mori, M., Morisaki, T., Morishima, S., Moriyama, S., Moro, A., Murakami, H., Murayama, M., Murakami, S., Nagasaki, K., Naito, O., Nakamura, S., Nakano, T., Nakashima, Y., Nardino, V., Narita, E., Narushima, Y., Natsume, K., Nemoto, S., Neu, R., Nicollet, S., Nishikawa, M., Nishimura, S., Nishiura, M., Nishiyama, T., Nocente, M., Nobuta, Y., Novello, L., Nunio, F., Ochoa, S., Ogawa, T., Ogawa, Y., Ohdachi, S., Ohmori, Y., Ohno, N., Ohtani, Y., Ohzeki, M., Oishi, T., Okano, F., Okano, J., Okano, K., Onishi, Y., Osakabe, M., Oshima, T., Ostuni, V., Oya, M., Oya, Y., Oyama, N., Ozeki, T., Pasqualotto, R., Pelli, S., Peretti, E., Phillips, G., Piccinni, C., Pigatto, L., Pironti, A., Pizzuto, A., Plockl, B., Polli, G., Poncet, J. -M., Ponsot, P., Puiatti, M., Radloff, D., Raimondi, V., Ramos, F., Rancsik, P., Ricci, D., Ricciarini, S., Rincon, E., Romano, A., Rossi, P., Roussel, P., Rubino, G., Saeki, H., Sagara, A., Sakakibara, S., Sakamoto, H., Sakamoto, M., Sakamoto, Y., Sakasai, A., Sakata, S., Sakuma, T., Sakurai, S., Salanon, B., Salmi, A., Sannazzaro, G., Sano, R., Sanpei, A., Sasajima, T., Sasaki, S., Sasao, H., Sato, F., Sato, M., Sawahata, M., Scherber, A., Scully, S., Seki, M., Seki, S., Shibama, Y., Shibata, Y., Shikama, T., Shimada, K., Shimono, M., Shinde, J., Shinya, T., Shinohara, K., Shirai, H., Shiraishi, J., Soare, S., Soleto, A., Someya, Y., Streciwilk-Kowalska, E., Strobel, H., Sueoka, M., Sukegawa, A., Sulistyanintyas, D., Sumida, S., Sunaoshi, H., Suzuki, H., Suzuki, M., Suzuki, S., Suzuki, T., Suzuki, Y., Svoboda, J., Szabolics, T., Szepesi, T., Takahashi, K., Takase, Y., Takechi, M., Takeda, K., Takeiri, Y., Takenaga, H., Taliercio, C., Tamura, N., Tanaka, H., Tanaka, K., Tani, K., Tanigawa, H., Tardocchi, M., Terakado, A., Terakado, M., Terakado, T., Teuchner, B., Tilia, B., Tobita, K., Toi, K., Toida, N., Tojo, H., Tokitani, M., Tokuzawa, T., Tormarchio, V., Tomine, M., Torre, A., Totsuka, T., Tsuchiya, K., Tsujii, N., Tsuru, D., Tsutsui, H., Uchida, M., Ueda, Y., Uno, J., Urano, H., Usui, K., Utoh, H., Valisa, M., Vallar, M., Vallcorba-Carbonell, R., Vallet, J. -C., Varela, J., Vega, J., Verrecchia, M., Vieillard, L., Villone, F., Vincenzi, P., Wada, K., Wada, R., Wakatsuki, T., Wanner, M., Watanabe, F., Watanabe, K., Wauters, T., Wiesen, S., Wischmeier, M., Yagi, M., Yagyu, J., Yajima, M., Yokooka, S., Yokoyama, M., Yamamoto, S., Yamanaka, H., Yamauchi, K., Yamauchi, Y., Yamazaki, H., Yamazaki, K., Yamazaki, R., Yamoto, S., Yanagi, S., Yanagihara, K., Yoshizawa, N., Zani, L., and Zito, P.

Subjects
assembly, Cryostat, Nuclear and High Energy Physics, Materials science, Tokamak, Nuclear engineering, Plasma, Condensed Matter Physics, Field coil, ITER risk mitigation, Overcurrent, law.invention, Control theory, law, Electromagnetic coil, research plan, broader approach, Voltage
Abstract

Construction of the JT-60SA tokamak was completed on schedule in March 2020. Manufacture and assembly of all the main tokamak components satisfied technical requirements, including dimensional accuracy and functional performances. Development of the plasma heating systems and diagnostics have also progressed, including the demonstration of the favourable electron cyclotron range of frequency (ECRF) transmission at multiple frequencies and the achievement of long sustainment of a high-energy intense negative ion beam. Development of all the tokamak operation control systems has been completed, together with an improved plasma equilibrium control scheme suitable for superconducting tokamaks including ITER. For preparation of the tokamak operation, plasma discharge scenarios have been established using this advanced equilibrium controller. Individual commissioning of the cryogenic system and the power supply system confirmed that these systems satisfy design requirements including operational schemes contributing directly to ITER, such as active control of heat load fluctuation of the cryoplant, which is essential for dynamic operation in superconducting tokamaks. The integrated commissioning (IC) is started by vacuum pumping of the vacuum vessel and cryostat, and then moved to cool-down of the tokamak and coil excitation tests. Transition to the super-conducting state was confirmed for all the TF, EF and CS coils. The TF coil current successfully reached 25.7 kA, which is the nominal operating current of the TF coil. For this nominal toroidal field of 2.25 T, ECRF was applied and an ECRF plasma was created. The IC was, however, suspended by an incident of over current of one of the superconducting equilibrium field coil and He leakage caused by insufficient voltage holding capability at a terminal joint of the coil. The unique importance of JT-60SA for H-mode and high-β steady-state plasma research has been confirmed using advanced integrated modellings. These experiences of assembly, IC and plasma operation of JT-60SA contribute to ITER risk mitigation and efficient implementation of ITER operation.

Published
2022

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