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-investigatorsM. Hron, I. Ďuran, J. Adámek, J. Brotánková, V. Fuchs, R. Pánek, P. Pavlo, L. Kryška

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:

Schrittwieser R., Ionita C., Balan P., Stöckel J., Adámek J., Hron M., Tichý M., Martines E., Van Oost G., Figueiredo H. F. C., Cabral J. A., Varandas C., Silva C., Pedrosa M. A., Hidalgo C., Klinger T.: Measurements Of Fluctuations With Probes In The Edge Region Of Various Toroidal Plasmas. Proceedings, contributed papers. Kiev : -, 2006 - (Zagorodny, A.; Kocherga, O.) ---. [ Abstract ]
[International Congress on Plasma Physics/13th./. Kiev (UA), 22.05.2006-26.05.2006]

Brotánková J., Stöckel J., Martines E., Van Oost G., Svoboda V., Görler T., Hansen T.: Fluctuation measurements with 2D matrix of Langmuir probes on the CASTOR tokamak. Proceedings of 32nd EPS Conference on Plasma Physics. Tarragona : European Physical Society, 2005 - (Milligen, B.; Hidalgo, C.) P5-018. ISBN 2-914771-24-X. - (EPS. 29C). [ Abstract ]
[European Physical Society Conference/32nd./. Tarragona (ES), 27.06.2005-01.07.2005]

Stöckel J., Devynck P., Gunn J., Martines E., Bonhomme G., Voitsekhovitch I., Van Oost G., Hron M., Ďuran I., Stejskal P., Adámek J., Weinzettl V., Žáček F.: Formation of convective cells during scrape-off layer biasing in the CASTOR tokamak. Plasma Physics and Controlled Fusion 47 [4] (2005) 635-643. [ Abstract ]

Devynck P., Bonhomme G., Martines E., Stöckel J., Van Oost G., Voitsekhovitch I., Adámek J., Azeroual A., Doveil F., Ďuran I., Gravier E., Gunn J., Hron M.: Spatially resolved characterization of electrostatic fluctuations in the scrape-off layer of the CASTOR tokamak. Plasma Physics and Controlled Fusion 47 [2] (2005) 269-280. [ Abstract ]

Kočan M., Pánek R., Gunn J. P., Stöckel J., Skalný J. D.: A new probe for ion temperature measurements in the tokamak scrape-off layer. Proceedings of 32nd EPS Conference on Plasma Physics. Tarragona : European Physical Society, 2005 - (Milligen, B.; Hidalgo, C.) P-2.082. ISBN 2-914771-24-X. - (EPS. 29). [ Abstract ]
[EPS Conference on Plasma Physics/32nd./. Tarragona (ES), 27.06.2005-01.07.2005]

Adámek J., Stöckel J., Hron M., Ďuran I., Pánek R., Tichý M., Schrittwieser R., Ionita C., Balan P., Martines E., Van Oost G.: Comparative measurements of the plasma potential with the ball-pen and emissive probes on the CASTOR tokamak. Czechoslovak Journal of Physics 55 [3] (2005) 235-242. [ Abstract ]

Adámek J., Ionita C., Schrittwieser R., Stöckel J., Tichý M., Van Oost G.: Direct Measurements of the Electron Temperature by a Ball-pen/Langmuir probe. 32nd EPS Conference on Plasma Physics and Controlled Fusion. Tarragona : European Physical Society, 2005 - (van Milligen, B.; Hidalgo, C.) P-5.081. - (29C). [ Abstract ] [ Link ]
[EPS Conference on Plasma Physics and Controlled Fusion /32./. Tarragona (ES), 27.06.2005-01.07.2005]

Spolaore M., Brotánková J., Peleman P., Devynck P., Figueiredo H., Kirnev G., Martines E., Stöckel J., Van Oost G., Adámek J., Dufková E., Ďuran I., Hron M., Weinzettl V.: Relaxation phenomena during edge plasma biasing in the CASTOR tokamak. 32nd EPS Conference on Plasma Physics and Controlled Fusion. Tarragona : European Physical Society, 2005 - (van Milligen, B.; Hidalgo, C.) P-4.031. ISBN 2-914771-24-X. [ Abstract ] [ Link ]
[EPS Conference on Plasma Physics and Controlled Fusion /32./. Tarragona (ES), 27.06.2005-01.07.2005]

Weinzettl V.: PROSTOROVÉ A ČASOVÉ CHOVÁNÍ LEHKÝCH NEČISTOT VE VYSOKOTEPLOTNÍM PLAZMATU TOKAMAKU CASTOR. Ustav fyziky plazmatu AV ČR. Obhájeno: Katedra fyzikální elektroniky Fakulta jaderná a fyzikálně inženýrská ČVUT, V Holešovičkách 2, 18000 Praha 8, ČR. 25.4. 2005. - Praha, 2004. 112 s.

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., Weinzettl V., Dufková E., Hidalgo C., Ďuran I., Stöckel J.: Relaxation of potential, flows, and density in the edge plasma of CASTOR tokamak. 12th International Congress on Plasma Physics. Nice, 2004. s. -. [ Abstract ]
[International Congress on Plasma Physics/12th./. Nice (FR), 25.10.2004-29.10.2004]

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]

Stöckel J., Devynck P., Gunn J., Martines E., Bonhomme G., Van Oost G., Hron M., Ďuran I., Pánek R., Stejskal P., Adámek J.: Edge Plasma Physics and Relevant Diagnostics on the CASTOR tokamak. Schriften des Forschungszentrums Jülich 3 [-] (2004) 1-6. [ Abstract ]
[First Cairo Conference on Plasma Physics & Applications. Cairo, 11.10.2003-15.10.2003]

Stöckel J., Devynck P., Gunn J., Martines E., Bonhomme G., Van Oost G., Hron M., Adámek J., Brotánková J., Dejarnac R., Ďuran I., Görler T., Hansen T., Pánek R., Stejskal P., Svoboda V., Žáček F.: Formation of convective cells in the scrape-off layer of the CASTOR tokamak. 12th International Congress on Plasma Physics. Nice, 2004. s. -. [ Abstract ]
[International Congress on Plasma Physics/12th./. Nice (FR), 25.10.2004-29.10.2004]

Gunn J. P., Schrittwieser R., Balan P., Ionita C., Stöckel J., Adámek J., Ďuran I., Hron M., Pánek R., Bařina O., Hrach R., Vicher M., Van Oost G., Van Rompuy T., Martines E.: Tunnel probes for measurements of the electron and ion temperature in fusion plasmas. Review of Scientific Instruments 75 [10] (2004) 4328-4330. [ Abstract ] [ Link ]
[Topical Conference on High-Temperature Plasma Diagnostics/15th./. San Diego, 19.04.2004-22.04.2004]

Piffl V., Weinzettl V., Burdakov A., Polosatkin S.: Intensity radial profiles of VUV line radiation near the solid target in a hot plasma. Czechoslovak Journal of Physics 54 [suppl. C] (2004) C89-C94. [ Abstract ]
[Symposium on Plasma Physics and Technology/21st./. Praha, 14.06.2004-17.06.2004]

Piffl V., Weinzettl V., Burdakov A., Polosatkin S.: Intensity radial profiles of VUV lines near the carbon target in the CASTOR tokamak. 31st European Physical Society Conference on Plasma Physics. London : Europhysics Conference Abstracts(ECA), 2004. P-5.138. - (ECA). [ Abstract ] [ Link ]
[European Physical Society Conference on Plasma Physics/31st./. Londýn (GB), 28.06.2004-02.07.2004]

Adámek J., Stöckel J., Hron M., Ďuran I., Pánek R., Žáček F., Tichý M., Bařina O., Hrach R., Vicher M., Gunn J. P., Schrittwieser R., Ionita C., Balan P., Martines E., Van Oost G., Van Rompuy T., De Beule P.: Measurement of Electron Temperature Fluctuations with Tunnel Probe in the CASTOR Tokamak. Schriften des Forschungszentrums Jülich. Forschungszentrum Julich , Německo, 2004. s. 81-84. ISBN 3-89336-374-2. [ Abstract ]
[First Cairo Conference on Plasma Physics & Applications. Cairo (EG), 11.10.2003-15.10.2003]

Adámek J., Ďuran I., Hron M., Pánek R., Stöckel J., Bařina O., Hrach R., Vicher M., Balan P., Schrittwiesser R., Ionita C., De Beule P., Van Den Berge G., Van Rompuy T., Van Oost G., Gunn J. P., Martines E.: Measurements of the Parallel and Perpendicular Ion Temperatures by Means of an Ion-sensitive Segmented Tunnel Probe. Contributions to Plasma Physics 44 [7-8] (2004) 683-688. [ Abstract ]
[International Workshop on Electrical Probes in Magnetized Plasmas /5./. Greifswald, 21.07.2003-23.07.2003]

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]

Pánek R., Krlín L., Tskhakaya D., Kuhn S., Stöckel J., Pavlo P., Svoboda V., Tendler M., Klíma R., Petržílka V., Zápotocký M.: Radial electric field generation due to edge plasma turbulence. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : European Physical Society, 2003 - (Koch, R.; Lebedev, S.) s. P-1.178. - (EPS.. 27A). [ Abstract ]
[EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]

Granucci G., Ekedahl A., Mailloux J., Erents K., Hron M., Joffrin E., Lomas P. J., Mantsinen M., Noterdaeme J.M., Ridolfini-Pericoli V., Petržílka V., Rantamäki K., Sartori R., Silva C., Tuccillo A. A., McDonald D.: Recent Results of LHCD Coupling Experiments with Near Gas Injection in JET. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : European Physical Society, 2003 - (Koch, R.; Lebedev, S.) s. P-1.191. - (EPS.. 27A). [ Abstract ]
[EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]

Hron M., Hidalgo C., Ďuran I., Gunn J., Stöckel J.: Relaxation of plasma potential and poloidal flows in the boundary of tokamak plasmas. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : EPS, 2003 - (Koch, R.; Lebedev, S.) s. P-1.172. - (EPS.. 27A). [ Abstract ]
[EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]

Pitts R. A., Chavan R., Davies S. J., Erents S. K., Kaveney G., Matthews G., Neill G., Vince J. E., Ďuran I.: Retarding field energy analyzer for the JET plasma boundary. Review of Scientific Instruments 74 [11] (2003) 4644-4657. [ Abstract ]

Balan P., Adámek J., Barina O., DeBeule P., Ďuran I., Gunn J. P., Hron M., Ionita C., Martines E., Pánek R.: Simultaneous Measurement of Electron and Ion Temperature with a New Kind of Langmuir Probe. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : European Physical Society, 2003 - (Koch, R.; Lebedev, S.) s. P-1.84. - (27A). [ Abstract ]
[EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]

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]

Weinzettl V., Ďuran I., Zajac J., Piffl V.: Edge plasma biasing experiments on the CASTOR tokamak: spectroscopic investigation and microwave measurements. Czechoslovak Journal of Physics 53 [11] (2003) 925-935. [ Abstract ]
[Workshop "Electric Fields Structures and Relaxation in Edge Plasmas"/6th./. St. Petersburg, 13.06.2003-14.06.2003]

Tsitrone E., Bucalossi J., Loarer T., Pégourié B., Brosset C., Adámek J., Delchambre E., Ďuran I., Gauthier E., Ghendrih P., Grisolia C., Grosman A., Gunn J., Hogan J., Mitteau R., Pánek R., Philips V., Reichle R., Reiter D., Roubin P.: Steady state density control in Tore Supra long discharges. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : European Physical Society, 2003 - (Koch, R.; Lebedev, S.) s. O-2.5A. - (EPS .) [ Abstract ]
[EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]

Hidalgo C., Goncalves B., Silva C., Pedrosa M. A., Erents K., Hron M., Matthews G. F., Pitts R.: Experimental investigation of dynamical coupling between turbulent transport and parallel flows in the JET plasma boundary region. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : European Physical Society, 2003 - (Koch, R.; Lebedev, S.) s. P-3.200. - (EPS.. 27A). [ Abstract ]
[EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]

Van Oost G., Adámek J., Antoni V., Balan P., Boedo J. A., Devynck P., Ďuran I., Eliseev L., Gunn J., Hron M., Ionita C., Jachmich S., Kirnev G. S., Martines E., Melnikov A., Schrittwieser R., Silva C., Stöckel J., Tendler M., Varandas C., Van Schoor M., Vershkov V., Weynants R. R.: Turbulent transport reduction by B x B velocity shear during edge plasma biasing:recent experimental results. Plasma Physics and Controlled Fusion 45 [5] (2003) 621-643. [ Abstract ]
[International Congress on Plasma Physics/2002./. Sydney, 15.07.2002-19.07.2002]

Piffl V., Weinzettl V., Burdakov A., Polosatkin S.: Line Intensity Radial Profiles Evolution in VUV & XUV Spectral Range. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : European Physical Society, 2003 - (Koch, R.; Lebedev, S.) s. P-1.61. - (EPS.. 27A). [ Abstract ]
[EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]

Stöckel J., Devynck P., Bonhomme G., Martines E., Van Oost G., Hron M., Voitsekhovitch I., Adámek J., Doveil F., Ďuran I., Gunn J., Stejskal P., Weinzettl V.: Poloidal structure of the scrape off layer turbulence in the CASTOR tokamak. 30th EPS Conference on Controlled Fusion and Plasma Physics. St. Petersburg : European Physical Society, 2003 - (Koch, R.; Lebedev, S.) s. P-1.179. - (EPS.. 27A). [ Abstract ]
[EPS Conference on Controlled Fusion and Plasma Physics/30th./. St. Petersburg (RU), 07.07.2003-11.07.2003]