| Title: |
Overview of first JT-60SA plasma operation and plans in view of ITER and DEMO |
| Authors: |
Garcia, J.; Yoshida, M.; Urano, H.; Takahashi, K.; Davis, S.; Tomarchio, V.; Phillips, G.; Abe, T.; Aiba, N.; Akazawa, Y.; Akimitsu, M.; Ariizumi, T.; Asakura, K.; Ayllon-Guerola, J.; Belpane, A.; Bin, W.; Buermans, J.; Buzas, A.; Cabrera, S.; Carralero, D.; Carraro, L.; Cavinato, M.; Cecconello, Marco; Chiba, S.; Clement-Lorenzo, S.; Coda, S.; Cseh, G.; Cubi, A.; de la Luna, E.; De Marzi, G.; De Tommasi, G.; Di Giacomo, M.; D'Isa, F.; Endo, Y.; Estrada, T.; Fabbri, M.; Falchetto, G.; Fassina, A.; Ferro, A.; Fiamozzi Zignani, C.; Franconnet, T.; Frello, G.; Fukui, K.; Fukumoto, M.; Gaio, E.; Galdon-Quiroga, J.; Garcia-Munoz, Manuel; Garzotti, L.; Gonzalez-Martin, J.; Grodzicki, K.; Guillen Gonzalez, R.; Hajnal, N.; Hamada, K.; Hasegawa, K.; Hatakeyama, S.; Hauer, V.; Hayashi, N.; Hayashi, T.; Heller, R.; Hinata, J.; Hiranai, S.; Hiratsuka, J.; Homma, H.; Hurzlmeier, H.; Iafrati, M.; Ichige, H.; Ichikawa, M.; Iijima, T.; Ikeda, R.; Inoue, S.; Isayama, A.; Ishii, T.; Ishita, K.; Joffrin, E.; Jokinen, A.; Kajiwara, K.; Kamata, I.; Kaminaga, A.; Kamiya, K.; Kashiwa, Y.; Kashiwagi, M.; Kawano, K.; Kawate, T.; Kayano, H.; Kazakov, Y.; Kikuchi, K.; Kimura, K.; Kisaki, M.; Ko, Y.; Kobayashi, T.; Kobayashi, K.; Kocsis, G.; Kojima, A.; Kojima, S.; Kojima, K.; Komata, M.; Komuro, K.; Kondo, A.; Kurosawa, R.; Lacroix, B.; Lang, P.; Le Coz, Q.; Marques-Gomez, R.; Martinez, J.; Matoike, R.; Matsuoka, S.; Miyata, Y.; Miyo, Y.; Mogaki, K.; Moreau, P.; Morimoto, T.; Murakami, H.; Murayama, M.; Nakamura, S.; Nakano, T.; Nemoto, S.; Nguyen Thanh Dao, C.; Nicollet, S.; Nishimura, S.; Nishiyama, T.; Nocente, M.; Novello, L.; Ohmori, Y.; Ohtani, Y.; Ohzeki, M.; Okano, J.; Onishi, Y.; Ortiz Ferrer, C.; Oshima, T.; Owada, A.; Pasqualotto, R.; Perelli, E.; Pigatto, L.; Plockl, B.; Prokopowicz, R.; Pucella, G.; Puglisi, G.; Radloff, D.; Rancsik, P.; Refy, D.; Reyner-Vinolas, A.; Richermoz, N.; Rigamonti, D.; Rosen, E.; Saeki, H.; Saito, Y.; Sakamoto, S.; Sakata, S.; Sakurai, R.; Sanchis-Sanchez, L.; Sano, R.; Sasajima, T.; Sasao, H.; Sato, M.; Sato, F.; Sawahata, M.; Seki, N.; Shibama, Y.; Shimada, K.; Shinde, J.; Shinohara, K.; Shinya, T.; Sonoda, S.; Sozzi, C.; Strobel, H.; Sueoka, M.; Sugiyama, H.; Sukegawa, A.; Sumida, S.; Suzuki, T.; Suzuki, S.; Suzuki, M.; Swiderski, L.; Szepesi, Tamas; Szewinski, J.; Tadokoro, S.; Takechi, M.; Takeda, K.; Tanaka, Y.; Tardocchi, M.; Terakado, M.; Teuchner, B.; Tobari, H.; Toida, N.; Tomine, M.; Torre, A.; Totsuka, T.; Tsuchiya, K.; Tsuru, D.; Tyminska, K.; Umezaki, D.; Unno, S.; Uno, J.; Usui, K.; Valisa, M.; Mark Varga, M.; Vavrik, M.; Velarde-Gallardo, L.; Verrecchia, M.; Wada, R.; Wakatsuki, T.; Wanner, M.; Watanabe, S.; Wischmeier, M.; Yaginuma, R.; Yagyu, J.; Yamamoto, T.; Yamamoto, S.; Yamanaka, H.; Yamauchi, K.; Yamazaki, R.; Yamazaki, H.; Yamoto, S.; Yanagihara, K.; Yokooka, S.; Yokoyama, T.; Yoshizawa, N.; Zani, L.; Zaniol, B. |
| Publisher Information: |
Uppsala universitet, Tillämpad kärnfysik; CEA, St Paul Les Durance, France.; Natl Inst Quantum Sci & Technol, Naka, Japan.; Fus Energy, Garching, Germany.; Univ Seville, Seville, Spain.; Univ Padua, Consorzio RFX CNR, INFN, ENEA,Acciaierie Venete SpA, Cso Stati Uniti 4, I-35127 Padua, Italy.; Lab Plasma Phys LPP ERM KMS, Brussels, Belgium.; Ctr Energy Res, Fus Plasma Phys Dept, Konkoly Thege Mikl Ut 29-33, H-1121 Budapest, Hungary.; CIEMAT, Lab Nacl Fus, Madrid, Spain.; Ecole Polytech Fed Lausanne EPFL, Swiss Plasma Ctr SPC, CH-1015 Lausanne, Switzerland.; ENEA, Dip to Fus & Tecnol Sicurezza Nucleare, C R Frascati,Via E Fermi 45, I-00044 Rome, Italy.; Univ Napoli Federico II, Dipartimento Ingn Elettr & Tecnol Informaz, Naples, Italy.; United Kingdom Atom Energy Author, Culham Campus, Abingdon OX14 3DB, Oxfordshire, England.; IPPLM Assoc, Inst Plasma Phys & Laser Microfus, Hery 23, PL-01497 Warsaw, Poland.; Karlsruhe Inst Technol, Hermann Von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany.; Max Planck Inst Plasma Phys, D-85748 Garching, Germany.; Univ Milano Bicocca, Dipartimento Fis G Occhialini, Milan, Italy.; Inst Plasma Sci & Technol CNR, Via R Cozzi 53, I-20125 Milan, Italy.; EUROfus Programme Management Unit, Garching, Germany. |
| Publication Year: |
2026 |
| Collection: |
Uppsala University: Publications (DiVA) |
| Subject Terms: |
tokamak; nuclear fusion; JT-60SA; Fusion; Plasma and Space Physics; plasma och rymdfysik |
| Description: |
JT-60SA is the world's largest superconducting tokamak in operation jointly built and exploited by Europe and Japan in the framework of the Broader Approach. JT-60SA aims at addressing some of the technological and physics challenges, such as the long pulse steady-state plasma operation at high beta. The start-up of JT-60SA, which culminated in the first JT-60SA plasma achieved on 23 October 2023 and Operation-1 (OP-1) until the end of 2023, including the achievement of >1 MA diverted plasmas, paves the way for a new generation of large superconducting tokamaks, such as ITER. Several key scientific topics were investigated during this initial phase. Similarly to ITER, the available parallel electric field (E-||) is low and yet plasma initiation was quickly obtained by means of the trapped particle configuration (TPC) with the assistance of similar to 1.5 MW of electron cyclotron resonance heating (ECRH). A first analysis and classification of the causes for disruptions have been done after the results of OP-1. Vertical displacement events (VDEs) were responsible for the vast majority of disruptions in increasing elongated plasmas, as the stabilization plate was not yet installed in this phase. Therefore, VDE predictors and control algorithms were developed using machine learning techniques with magnetics probe data, showing that these novel techniques are also suitable for the start-up tokamak phases characterized by scarce input data. JT-60SA will restart operation in 2026 following a series of upgrades. The experimental programme for future operations is guided by significant modelling 'predict first' activity, which shows that access to and development of H-mode in conditions of future burning plasmas will be possible with high negative neutral beam injection (N-NBI) and ECRH input power. The integration of such elements into a steady-state long pulse operation will be done with the installation of W plasma facing components (PFC) after the initial campaigns. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
Nuclear Fusion, 0029-5515, 2026, 66:11; ISI:001799770200001 |
| DOI: |
10.1088/1741-4326/ae74e1 |
| Availability: |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-593859; https://doi.org/10.1088/1741-4326/ae74e1 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.52E2AF6 |
| Database: |
BASE |