Physics and operation oriented activities in preparation of the JT-60SA tokamak exploitation

Giruzzi, G.; Yoshida, M.; Artaud, J.F.; Asztalos, Ö.; Barbato, Emanuele; Bettini, Paolo; Bierwage, Andreas; Boboc, A.; Bolzonella, T.; Clement-Lorenzo, S.; Coda, S.; Cruz, N.; Day, Christian; Tommasi, G. De; Dibon, M.; Douai, D.; Dunai, D.; Enoeda, Mikio; Farina, D.; Figini, L.; Fukumoto, M.; Gałązka, K.; Galdon, J.; García, J.; García-Muñoz, M.; Garzotti, L.; Gil, C.; Gleason-Gonzalez, C.; Goodman, T. P.; Granucci, G.; Hayashi, Nobuhiko; Hoshino, Kazuo; Ide, S.; Imazawa, Ryota; Innocente, P.; Isayama, A.; Itami, K.; Joffrin, E.; Kamada, Y.; Kamiya, Kōji; Kawano, Y.; Kawashima, H.; Kobayashi, Takayuki; Kojima, Akira; Kubo, H.; Lang, P. T.; Lauber, P.; Luna, E. de la; Maget, P.; Marchiori, G.; Mastrostefano, S.; Matsunaga, G.; Mattei, M.; McDonald, D. C.; Mele, A.; Miyata, Yasumitsu; Moriyama, S.; Moro, A.; Nakano, T.; Neu, R.; Nowak, S.; Orsitto, F.; Pautasso, G.; Pégouriè, B.; Pigatto, L.; Pironti, A.; Platania, P.; Pokol, Gergö; Ricci, D.; Romanelli, M.; Saarelma, S.; Sakurai, S.; Sartori, F.; Sasao, H.; Scannapiego, M.; Shimizu, Kosuke; Shinohara, K.; Shiraishi, Jun; Soare, S.; Sozzi, C.; Stępniewski, W.; Suzuki, Takahiro; Suzuki, Yasuhiro; Szepesi, T.; Takechi, M.; Tanaka, K.; Terranova, D.; Toma, M.; Urano, H.; Vega, J.; Villone, F.; Vitale, V.; Wakatsuki, Takuma; Wischmeier, M.; Zagórski, R.

doi:10.1088/1741-4326/aa7962

Cited by 22 publications

(20 citation statements)

References 57 publications

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“…One of the key questions is whether the turbulence reduction obtained in JET and AUG is universal or it is just restricted to those tokamaks and ITG-dominated electromagnetic turbulence regimes. Elucidating this question is essential in order to give confidence on the predictions performed for future tokamaks with a significant fast ion fraction, such as ITER or JT-60SA [17]. Therefore, in this paper we analyse a scenario similar to the one analysed in the past: the so-called JET hybrid H-mode scenario, at high β and low core magnetic shear.…”

Section: Nuclear Fusionmentioning

confidence: 99%

Impact of fast ions on a trapped-electron-mode dominated plasma in a JT-60U hybrid scenario

Mazzi¹,

Zarzoso²,

García³

et al. 2020

Nucl. Fusion

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The impact of fast ions on a trapped electron mode (TEM) is extensively analysed by linear and nonlinear gyrokinetic simulations for a JT-60U plasma at high β and low magnetic shear using the Gene code in local approximation. For the first time, it is shown that TEM-induced turbulent transport may remain unaffected by the steep fast ion pressure profile generated by the Neutral Beam Injection. Unlike recent observations of ion temperature gradient (ITG)-induced turbulent transport reductions due to fast ions, TEMdominated systems could act differently in the presence of a significant fast ion population. The possible role of zonal flows as a saturation mechanism is analyzed, showing that their weak impact in the reported JT-60U scenario might lead to different behaviour of fast ions with respect to the ITG-dominated discharges. It is also shown that Alfvénic shear modes are destabilized at low wave numbers (n 8). They are identified as drift Alfvén waves destabilized by ITG, which is a form of Alfvénic ITG instabilities. Deep numerical analysis provides the physical parameter range in which ITG-driven BAEs are stabilized. These results open the way to new possibilities of tailoring future experimental scenarios in order to benefit from transport reduction by fast ions.

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Section: Nuclear Fusionmentioning

confidence: 99%

Impact of fast ions on a trapped-electron-mode dominated plasma in a JT-60U hybrid scenario

Mazzi¹,

Zarzoso²,

García³

et al. 2020

Nucl. Fusion

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“…The target plasma analyzed in this study belongs to the JT-60SA plasma operation scenario #4-1, which is called an ITER-like shape inductive scenario [39][40][41] . Hence, the height of the pressure pedestal is adjusted by changing that of the T i pedestal with the assumption that = T T i e .…”

Section: Prediction Of Pedestal Profiles Including the Rotation And ωmentioning

confidence: 99%

Analysis of ELM stability with extended MHD models in JET, JT-60U and future JT-60SA tokamak plasmas

Aiba

Pamela

Honda

et al. 2017

Plasma Phys. Control. Fusion

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“…JT-60SA is a key milestone in the goal of commercial nuclear fusion energy [1][2][3], anticipating scientific and engineering challenges of ITER [4] and DEMO [5,6] devices. In JT-60SA plasma several ITER and DEMO-like operation scenarios will be tested [7,8]: inductive (standard H-mode) scenarios similar to ITER baseline scenarios, advanced inductive scenarios (high β and low magnetic shear) similar to ITER hybrid scenarios and steady state scenarios mimicking the plasma conditions of a nuclear fusion power plant [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

MHD stability of JT-60SA operation scenarios driven by passing energetic particles for a hot Maxwellian model

Varela¹,

Watanabe²,

Shinohara³

et al. 2020

Nucl. Fusion

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Datasets of mobile phone trajectories collected by network operators offer an unprecedented opportunity to discover new knowledge from the activity of large populations of millions. However, publishing such trajectories also raises significant privacy concerns, as they contain personal data in the form of individual movement patterns. Privacy risks induce network operators to enforce restrictive confidential agreements in the rare occasions when they grant access to collected trajectories, whereas a less involved circulation of these data would fuel research and enable reproducibility in many disciplines. In this work, we contribute a building block towards the design of privacy-preserving datasets of mobile phone trajectories that are truthful at the record level. We present GLOVE, an algorithm that implements 𝑘-anonymity, hence solving the crucial unicity problem that affects this type of data while ensuring that the anonymized trajectories correspond to real-life users. GLOVE builds on original insights about the root causes behind the undesirable unicity of mobile phone trajectories, and leverages generalization and suppression to remove them. Proof-of-concept validations with large-scale real-world datasets demonstrate that the approach adopted by GLOVE allows preserving a substantial level of accuracy in the data, higher than that granted by previous methodologies.

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Physics and operation oriented activities in preparation of the JT-60SA tokamak exploitation

Cited by 22 publications

References 57 publications

Impact of fast ions on a trapped-electron-mode dominated plasma in a JT-60U hybrid scenario

Impact of fast ions on a trapped-electron-mode dominated plasma in a JT-60U hybrid scenario

Analysis of ELM stability with extended MHD models in JET, JT-60U and future JT-60SA tokamak plasmas

MHD stability of JT-60SA operation scenarios driven by passing energetic particles for a hot Maxwellian model

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