Institute of Plasma Physics - project detail 00049

3D structure of the edge turbulence and its control on the Castor tokamak
Project ID:	GA202/03/0786
Provider:	Czech Science Foundation
Period:	Jan 01, 2003 - Dec 31, 2005
Principal Investigator:	RNDr. Jan Stöckel, CSc.
Co-investigators	, , , , , , ,
Aims of the project: The principal aim of the project is to investigate the 3D structure of the edge turbulence on the CASTOR tokamak. In particular, the system of 128 Langmuir probes, surrounding the plasma column will be used to measure the poloidal distribution of densityand potential fluctuation and their mutual correlation. Simultaneously, the poloidal ring of 32 electrodes will be located at a different toroidal position. Such configuration provides a unique possibility of multi-dimensional analysis of edge turbulentstructures at different discharge conditions. Moreover, the edge turbulence will be modified by means of AC and DC biasing of individual electrodes. In addition, some specific features of edge turbulence (temperature fluctuations, link between theelectrostatic and magnetic fluctuations,...) will be studied by means of several advanced probe diagnostics, such as the emissive, tunnel, combined magnetic and electric probes e.t.c. Most of them will be tested in tokamaks for the first time.
Progress/Results: Main results achieved in the frame of the grant project are as follows: 1. Identification of a quasi-coherent turbulent mode with a well defined poloidal number, which exists at the backgroung broadband turbulence in the edge plasma, where the magnetic f
Results:
Pánek R., Krlín L., Taskhakaya D., Kuhn S., Stöckel J., Pavlo P., Tender M., Svoboda V., Petržílka V.: Anomalous diffusion and radial electric field generation due to edge plasma turbulence. Contributions to Plasma Physics 44 [1-3] (2004) 203-204. [ Abstract ] [International Workshop on Plasma Edge Theory in Fusion Devices/9th./. San Diego, 03.09.2003-05.09.2003]
Krlín L., Pánek R., Petržílka V., Stöckel J., Svoboda V., Kuhn S., Tskhakaya D., Tendler M.: Anomalous impurity diffusion in models of tokamak edge plasma turbulence. Czechoslovak Journal of Physics 54 [suppl.C] (2004) C157-C163. [ Abstract ] [Symposium on Plasma Physics and Technology/21st./. Praha, 14.06.2004-17.06.2004]
Hron M., Ďuran I., Stöckel J., Hidalgo C.: Decay of enhanced density and damping of plasma flows after the electrode biasing terminaton on the CASTOR tokamak. Czechoslovak Journal of Physics 54 [suppl. C] (2004) C22-C27. [ Abstract ] [Symposium on Plasma Physics and Technology/21st./. Praha, 14.06.2004-17.06.2004]
Adámek J., Stöckel J., Hron M., Ryszawy J., Tichý M., Schrittwieser R., Ionita C., Balan P., Martines E., Van Oost G.: Direct plasma potential measurements by a novel probe. Proceedings of the 31th EPS Conference on Controlled Fusion and Plasma Physics. London, 2004. s. 514-515. [ Abstract ] [ Link ] [EPS Conference on Controlled Fusion and Plasma Physics /31./. London (GB), 28.06.2004-02.07.2004]
Adámek J., Stöckel J., Hron M., Ryszawy J., Tichý M., Schrittwieser R., Ionita C., Balan P., Martines E., Van Oost G.: A novel approach to direct measurement of the plasma potential. Czechoslovak Journal of Physics 54 [supll.C] (2004) C95-C99. [ Abstract ] [Symposium on Plasma Physics and Technology/21st./. Praha, 14.06.2004-17.06.2004]
Devynck P., Farge M., Schneider K., Stöckel J., Hron M., Ďuran I., Adámek J., Van Oost G.: Diffusive and Convective parts of the turbulent flux in the SOL of tokamaks. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : EPS, 2003 - (Koch, R.; Lebedev, S.) s. P-1.168. - (27A). [ Abstract ] [EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]