The role of JET for the preparation of the ITER exploitation

Romanelli, M.; Laxåbäck, Martin; Durodié, F.; Horton, L. D.; Lehnen, M.; Murari, A.; Rimini, F.; Sips, G.; Zastrow, K.‐D.

doi:10.1016/j.fusengdes.2011.02.059

Cited by 20 publications

(23 citation statements)

References 29 publications

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“…(67) yields about 2 MN, which gives a correct order of magnitude of the sideways force measured in JET. 2,3,5,[9][10][11]13,56,57 The estimates are obtained assuming large-amplitude m ¼ n ¼ 1 magnetic perturbation, but actually without attributing it to the plasma. For the ideal plasma, Eqs.…”

Section: Estimates Of the Sideways Forcementioning

confidence: 99%

Analytical model of wall forces produced by kink perturbations in tokamaks

Mironov

Pustovitov

2015

Phys. Plasmas

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Analytical model of the electromagnetic forces produced by kink modes on the tokamak wall [H. R. Strauss et al., Phys. Plasmas 17, 082505 (2010)] is revisited. One of the main conclusions of the mentioned paper is that the largest force occurs at cs w % 1, where c is the kink growth rate and s w is the wall penetration time. In the present study, a similar approach is developed under less restrictive assumptions on the plasma and dynamics of perturbation, and a different result is obtained: the force increases with c and must be maximal at cs w ! 1. Additionally, the dependence of its amplitude on the plasma parameters is clarified. All distinctions and their reasons are explained in detail. The analysis is performed in the cylindrical model incorporating a resistive wall treated without traditional thin-wall constraints and covering therefore a full range in cs w . It is applicable to either locked or rotating modes. Estimates of the sideways force are presented and compared with earlier forecasts. V C 2015 AIP Publishing LLC. [http://dx.

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Section: Estimates Of the Sideways Forcementioning

confidence: 99%

Analytical model of wall forces produced by kink perturbations in tokamaks

Mironov

Pustovitov

2015

Phys. Plasmas

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“…Experiments investigating the rapid production of the required high density for runaway mitigation are being pursued. [88][89][90] The required density would be reduced if runaway electrons suffered additional losses. Evidence for such losses have been seen on DIII-D, but the nature of these losses needs further exploration.…”

Section: Preventionmentioning

confidence: 99%

Theory of tokamak disruptions

Boozer

2012

Physics of Plasmas

133

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“…Here, the plasma and wall are vertically elongated, but it can be expected that the main dependencies found in [23][24][25][26] should also manifest themselves in our case too [22,31,32]. In particular, we will check the prediction that a strong radial force can be generated during the TQ before the CQ start, although the presence of dangerous electromagnetic loads in tokamaks is usually associated with the current quench [6,7,[11][12][13][14][15][16][17][18][19][33][34][35][36][37][38][39][40][41][42][43][44], sometimes explicitly noting that the force is proportional to [7,36,42].…”

Section: Formulation Of the Problemmentioning

confidence: 96%

“…In fact, the beta values are at the level of a few percent (less than 3% in the TRT project), but they are called high because of dangerous vicinity to the limits, exceeding which results in the development of instabilities. The stability problems still remain critical for the toroidal systems [6][7][8][9][10], although the considerable progress has been achieved in tokamak studies [6,7,[11][12][13][14][15][16]. However, with increasing scales of experiments, new problems arise, because the instabilitygenerated releases of heat and magnetic energy result in damage of the wall and in-vessel elements.…”

Section: Introductionmentioning

confidence: 99%

“…However, with increasing scales of experiments, new problems arise, because the instabilitygenerated releases of heat and magnetic energy result in damage of the wall and in-vessel elements. The most dangerous are disruptions [6,7,[11][12][13][14][15][16][17][18][19], which are almost impossible to avoid when operating in the intensive tokamak regimes. Analysis of the pulsed loads during the disruptions becomes a necessity.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Electromagnetic Loads on the Vacuum Vessel during Thermal Quench in the TRT Tokamak

2021

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The analysis is performed of electromagnetic loads on the vacuum vessel ("wall") of the TRT tokamak during thermal quench. The calculations are performed using the DINA code. The rapid thermal quench and subsequent plasma evolution are considered. The tokamak is treated as axially symmetric and the wall is modeled by a set of ring conductors. Accordingly, only the toroidal currents induced in the wall and the forces associated with them are taken into account. For such formulation of the problem, it is shown that, after the thermal quench, the total radial force acting on the TRT vacuum vessel is approximately 8 MN, being approximately 17% lower than the analytical estimates. This force is non-uniformly distributed along the poloidal contour; its local maxima are 2.8 times higher than the average level. Therefore, such loads should be taken into account when designing the TRT tokamak.

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The role of JET for the preparation of the ITER exploitation

Cited by 20 publications

References 29 publications

Analytical model of wall forces produced by kink perturbations in tokamaks

Analytical model of wall forces produced by kink perturbations in tokamaks

Theory of tokamak disruptions

Analysis of Electromagnetic Loads on the Vacuum Vessel during Thermal Quench in the TRT Tokamak

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