Head of Department

Sándor Zoletnik

Tel: (36 1) 3922753

e-mail: zoletnik.sandor@ek-cer.hu

The research area of the laboratory is the advancement of controlled fusion energy production: develops and builds plasma diagnostic systems, performs and evaluates measurements on the world’s largest fusion experiments. Various plasma physics phenomena are studied using these measurements. The two major technology fields are video diagnostics and Beam Emission Spectroscopy (BES).

One of the aims of video diagnostics is to study fast phenomena in plasmas using ultrafast (up to several 100 000 frames/sec) cameras. Examples are ablation of solid state materials (pellets) in the plasma, study of instabilities. The other important field is recording of overview images with multiple cameras. The EDICAM camera system was developed by the laboratory in order to combine the recording of slow overview video streams with fast observation of small areas. This system can also take simple decisions and modify its operation on the basis of the measurements. An 8-camera EDICAM system is a basic diagnostic on the Wendelstein 7-X stellarator. An EDICAM system will also be used for recording the first measurements on the EU-Japan JT-60SA tokamak experiment.

Beam Emission Spectroscopy is based on the injection of an accelerated atomic beam into the fusion plasma, which excites the atoms and thus they emit light. The light emission from the beam is observed with a sensitive and high frequency optical measurement system. From fast fluctuations of the light emission information on plasma density fluctuation, and in turn turbulence, can be gained which is the most important process determining plasma confinement. The laboratory develops its original alkali (Li, Na, Rb, Cs) beam injectors and light detection systems. These are installed on various large fusion devices and used for regular measurements of the edge plasma density and turbulence. For study of the core plasma heating atomic beams are used. Special statistical analysis program packages and algorithms are developed and used for data analysis.

Due to the technical related activities of the department, it has significant engineering group to support the above-mentioned main development fields. Furthermore, the engineers are participating in the following fusion related long-term projects:

IFMIF-DONES: The DONES (DEMO Oriented Neutron Source) project will develop material irradiation experiments which are going to imitate the environment in the DEMO tokamak. This way, materials can be tested for industrial fusion power plant usage. In the laboratory, Systems Engineering works are conducted (e.g. defintion and identification of requirements and interfaces), and the DONES Test Cell conceptual design is under development too. The Test Cell is the project’s heart where the material irradiation will take place.

ITER: Development of CAD models and ancillary system equipment of the tritium breeding blankets for the ITER experimental reactor. The breeding blankets will be one of the key elements of the future fusion reactors. The WCLL (Water-Cooled Lithium-Lead) breeding concept is one of the most promising candidates for the next generation of fusion reactors (DEMO) after ITER.

The Plasma Physics Laboratory participates in the research program of the following experiments:

JET, MAST-Upgrade (UK), ASDEX Upgrade, Wendelstein 7-X (Germany), COMPASS (Czech Republic), KSTAR (South Korea), EAST (China), JT-60SA (Japan). Most of the work is performed in the framework of the Eurofusion konzorcium with support of the European Union. More information on Hungarian fusion research can be found at magfuzio.hu.

The colleagues of the department

Sándor Zoletnik – Head of department

Erik Walcz – Deputy Head of Department

Gábor Anda – Senior research fellow

Örs Asztalos – Ph.D. student

Gábor Cseh – Research fellow

Dániel Dunai – Senior research fellow

Sándor Hegedűs – Junior research fellow

Tamás Ilkei – Development engineer

Imre Katona – Development Engineer

Lajos Gábor Kocsis – Senior research fellow

Balázs Leskó – Development Engineer

Domonkos Ferenc Nagy – Development Engineer

Réka Nagy – Project Assistant

Soma Olasz – Ph.D. student

Dénes Zoltán Oravecz – Development Engineer

Gábor Petravich – Senior research fellow (retired)

Gergő Pokol – Senior research fellow (part time)

Dániel Imre Réfy – Ph.D. student

Tamás Szabolics – Development Engineer

Tamás Zoltán Szepesi – Senior research fellow

Balázs Tál – Research fellow

Miklós László Vécsei – Research fellow

András Zsákai – Development Engineer

Lilla Zsebéné Zsuga – Ph.D. student