magneto-hydro-dynamic stability of fusion plasmas

Organization profile

Introduction / mission

The control of large scale magnetic instabilities in fusion plasmas is essential for the successful operation of ITER and future fusion power plants. Large scale numerical simulations on the largest supercomputers are applied to study the physics of these instabilities, their consequences and the methods for control.

Highlighted phrase

Simulations of instabilities in fusion plasmas, developing the predictive capability for their occurrence, consequences and control, are required for the preparation of operation of ITER and design of future machines

Organisational profile

Fusion plasmas can suffer from global instabilities of the magnetic structure of the plasma. The so-called magnetohydrodynamic (MHD) instabilities, driven unstable by the plasma pressure and current, can cause fast losses of the thermal plasma energy. A typical time scale is of the order of 100ms to 1ms.

In present tokamak experiments the effect of the fast MHD induced energy losses to the first wall are mostly tolerable. However, in ITER and future fusion power plants the resulting heat fluxes are likely to be beyond the melting limits of the plasma facing components.

Large-scale computer simulation can give valuable insight in the underlying physics of MHD instabilities as well as the methods for their control. For this purpose, the MHD simulation code JOREK is under development within the European fusion program (www.jorek.eu). The JOREK code is unique in that it combines a (MHD) fluid description of the main plasma with realistic description of the plasma wall interaction. This includes a particle model for neutrals and impurities, describing the sputtering, ionization, recombination and collisions.

The main applications include so-called Edge Localised Modes (ELMs), radiative instabilities leading to disruptions and MHD instabilities driven unstable by the population of fast particles in the plasma originating from fusion reactions and external heating.

Fingerprint Dive into the research topics where magneto-hydro-dynamic stability of fusion plasmas is active. These topic labels come from the works of this organisation's members. Together they form a unique fingerprint.

Magnetohydrodynamics Engineering & Materials Science
peeling Physics & Astronomy
Plasmas Engineering & Materials Science
simulation Physics & Astronomy
perturbation Physics & Astronomy
pellets Physics & Astronomy
gas injection Physics & Astronomy
magnetohydrodynamics Physics & Astronomy

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Research Output 2014 2019

A wall-aligned grid generator for non-linear simulations of MHD instabilities in tokamak plasmas

JET Contributors, MAST Team, JOREK Team, Pamela, S. & Huijsmans, G., 1 Oct 2019, In : Computer Physics Communications. 243, p. 41-50 10 p.

Research output: Contribution to journalArticleAcademicpeer-review

Plasma stability
Magnetohydrodynamics
generators
grids
Plasmas
34 Downloads (Pure)

Closed-form solutions for the trajectories of charged particles in an exponentially varying magnetostatic field

van Vugt, D. C., Kamp, L. P. J. & Huijsmans, G. T. A., 1 Jan 2019, In : IEEE Transactions on Plasma Science. 47, 1, p. 296-299 4 p., 8544029.

Research output: Contribution to journalArticleAcademicpeer-review

Open Access
File
magnetostatic fields
charged particles
trajectories
particle motion
deflection
4 Citations (Scopus)
1 Downloads (Pure)

Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade

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T., Walkden, N., Wauters, T., Weiland, M., Weinzettl, V., Wensing, M., Wiesen, S., Wiesenberger, M., Wilkie, G., Willensdorfer, M., Wischmeier, M., Wu, K., Xiang, L., Zagorski, R., Zaloga, D., Zanca, P., Zaplotnik, R., Zebrowski, J., Zhang, W., Zisis, A., Zoletnik, S. & Zuin, M., Aug 2019, In : Nuclear Fusion. 59, 8, 086020.

Research output: Contribution to journalArticleAcademicpeer-review

refueling
ballooning modes
flattening
plasma density
shear

Press / Media

Tokamaks of the world, contribute!

Guido T.A. Huijsmans

9/01/17

1 item of Media coverage

Press/Media: Expert Comment