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Wave HF Plasma Heating

#0314


VOLNA

Tech Area / Field

  • FUS-PLA/Plasma Physics/Fusion

Status
8 Project completed

Registration date
14.12.1994

Completion date
30.06.1997

Senior Project Manager
Nietzold D

Leading Institute
Russian Academy of Sciences / Physical Technical Institute, Russia, St Petersburg

Supporting institutes

  • NPO ISTOK-2, Russia, Moscow reg., Fryazino\nInstitute of High-Power Radio-construction, Russia, St Petersburg

Collaborators

  • Dublin City University, Ireland, Dublin\nCulham Laboratory, UK, Culham\nFOM / Instituut voor Plasmafysica, The Netherlands, Neiuwegein\nJoint European Torus (JET) / Joint Undertaking, UK, Abingdon\nPrinceton National Laboratory, USA, NJ, Princeton

Project summary

The study of auxiliary plasma heating methods in a tokamak is an important point in the nuclear fusion program. The recent experiments on plasma heating using the high-frequency (HF) ion cyclotron reson-ance (ICR) method and the neutral particles beam injection (NBI) me-thod in the JET tokamak and the current drive experiments using lower hybrid (LH) waves in JT-60 and TORE-SUPRA tokamaks have been quite successful. So one can reasonably suggest using these methods in the HER tokamak-reactor. Nevertheless there is a number of unsettled physical and technical problems in these heating methods. Besides, new ideas appear in the field of HP methods which can be easily and fast tested on a comparatively small tokamaks, particularly on those in the High Temperature Plasma Physics Laboratory of the A.F.Ioffe Institute (RAS).

In this laboratory intensive studies of two HP heating methods (ICR and LHR plasma heating) and of plasma current drive are being carried out on tokamaks FT-1 , PT-2 and TUMAN-3. A team of competent experimenters and theorists has been formed here, there is a techni-cal base in the form of power supplies, diagnostic equipment and HP generators. The current modification of the tokamaks TUMAN-3 and PT-2 and the construction of the new perspective device with a small as-pect ratio GLOBUS-M require the further development of the laboratory HP systems by increasing of the output power and changing the working frequency range.

The goals of the project are:

(i) design and construction of a HP system for plasma heating at frequencies up to 50 MHz and 3-4 GHz with output power up to 4 MW and 1 MW, respectively;

(ii) experiments on the current drive and plasma heating, on the initiation of the im-proved confinement regime (H-mode) and the study of the L-H transi-tion mechanisms. Title of the project is VOLNA. Its main tasks are:

ICR frequencies:

• carrying out the plasma heating experiments in the improved confi-nement regime (H-mode) on the TUMAW-3 device with the increase of the launched power up to 2-4 MW and of the frequency up to 50 MHz.

• initiation and study of the transition to the improved plasma con-finement regime on the TUMAN-3 device.

• carrying out the conceptual plasma heating experiments on the con-structed device with a small aspect ratio GLOBUS-M with the aim of obtaining the maximum beta.


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