Institute of Plasma Physics - project detail 00050

Modelling of specific processes in the edge plasma in tokamak
Project ID:	GP202/03/P062
Provider:	Czech Science Foundation
Period:	Jan 01, 2003 - Dec 31, 2005
Principal Investigator:	Mgr. Radomír Pánek, Ph.D.
Aims of the project: The project deals with a numerical and analytical modelling of the processes in the edge plasma of tokamak. First part includes Particle-In-Cell (PIC) simulations of unique probes planned for the study of plasma turbulence and measurement of the iontemperature in CASTOR and TORE SUPRA tokamaks. Computer simulations will be a tool for calibration of the probes and for a correct interpretation of experimental results. The study of the anomalous diffusion caused by turbulent potential structures inthe edgeplasma is a subject of the second part of the project which complements the main project GA AV A1043201. The aim is to adapt the PIC model so that it allows to calculate diffusion coefficients, Poincaré plots etc. by the use of which thephysical nature of the stochastic dynamics and ion diffusion will be studied in a time-independent and spatially periodical potential field. Last part of the project is focused on an analytical formulation of the fast electron generation in the edge
Progress/Results: In the frame of the grant we studied the anomalous diffusion of heavier impurity ions in tokamak plasma. It was found that drift approximation commonly used in numerical codes provides considerably different results than an exact solution taking into acc
Results:
Gunn J. P., Boucher C., Dionne M., Ďuran I., Fuchs V., Loarer T., Nanobashvili I., Pánek R., Pascal J.-Y., Saint-Laurent F., Stöckel J., Van Rompuy T., Zagórski R., Adámek J., Bucalossi J., Dejarnac R., Devynck P., Hertout P., Hron M., Lebrun G., Moreau P., Rimini F., Sarkissian A., Van Oost G.: Evidence for a poloidally localized enhancement of radial transport in the scrape-off layer of the Tore Supra tokamak. Journal of Nuclear Materials 363-365 (2007) 484-490. [ Abstract ] [ Link ] [International Conference on Plasma-Surface Interactions in Controlled Fusion Devices/17th./. Hefei, 22.05.2006-26.05. 2006]
Gunn J. P., Boucher C., Dionne M., Ďuran I., Fuchs V., Loarer T., Pánek R., Saint-Laurent F., Stöckel J., Adámek J., Bucalossi J., Dejarnac R., Devynck P., Hertout P., Hron M., Nanobashvili I., Rimini F.G., Sarkissian A.: Scrape-off layer flows in the Tore Supra tokamak. AIP Conference Proceedings. - : -, 2006 - (Sadowski, M.; Soltan, A.; Dudek, M.; Hartfuss, H.; Pawelec, E.) S. 27-34. - (812). [ Abstract ] [ Link ] [AIP Conference Proceedings. Opole-Turawa (PL), 06.09.2006-09.09.2006]
Gunn J. P., Boucher C., Dionne M., Ďuran I., Fuchs V., Loarer T., Nanobashvili I., Pánek R., Pascal J.Y., Saint-Laurent F., Stöckel J., Van Rompuy T., Zagórski R., Adámek J., Bucalossi J., Ciraolo G., Dejarnac R., Devynck P., Ghendrih P., Hertout P., Hron M., Moreau P., Pégourié B., Rimini F.G., Sarazin Y., Sarkissian A., Van Oost G.: Links Between Wide Scrape-Off Layers, Large Parallel Flows, and Bursty Transport in Tokamaks. IEAEA FEC Preprints. Web Mezinarodní atomové agentury (IAEA) : Web Mezinarodní atomové agentury (IAEA), 2006. EX/P4-9. [ Abstract ] [ Link ] [IAEA Fusion Energy Conference. Chengdu (CN), 16.10.2006-21.10.2006]
Gunn J. P., Pánek R., Stöckel J., Van Oost G., Van Rompuy T.: Simultaneous measurements of fluctuation of ion current, electron temperature, and floating potential with a tunnel probe. Czechoslovak Journal of Physics 55 [3] (2005) 255-263. [ Abstract ] [Wokshop on Electric Fields, Structures and Relaxations in Edge Plasma. Nice, 26.10.2004-27.10.2004]
Pánek R., Gunn J. P., Bucalossi J., Ďuran I., Geraud A., Hron M., Loarer T., Pégourié B., Stöckel J., Tsitrone E.: The response of the Tore Supra edge plasma to supersonic pulsed gas injection. Journal of Nuclear Materials 337-339 [16] (2005) 530-534. [ Abstract ] [Plasma Surface Interactions /16./. Portland, 24.5.2005-28.5.2005]
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]
Pánek R., Krlín L., Stöckel J., Tskhakaya D., Kuhn S., Pavlo P., Tendler M.: Anomalous impurity diffusion in an experimentally measured turbulent potential. Proceedings of 32nd EPS Conference on Plasma Physics. Tarragona : European Physical Society, 2005 - (Milligen, B.; Hidalgo, C.) P-5.020. ISBN 2-914771-24-X. - (EPS. 29C). [ Abstract ] [EPS Conference on Plasma Physics/32nd./. Tarragona (ES), 27.06.2005-01.07.2005]
Pánek R., Krlín L., Tender M., Tskhakaya D., Kuhn S., Svoboda V., Klíma R., Pavlo P., Stöckel J., Petržílka V.: Anomalous Ion Diffusion and Radial-Electric-Field Generation in a Turbulent Edge Plasma Potential Weakly Correlated in Time and Space. Physica Scripta 72 [-] (2005) 327-332. [ Abstract ]
Kočan M., Skalný J. D., Pánek R., Stöckel J., Gunn J., Kuhn S.: Particle-in-Cell Simulations of the Segmented Tunnel Probe for Ion-Temperature Measurements in the Tokamak Scrape-off Layer. Proceedings of the International Conference Nuclear Energy for New Europe. - : -, 2005. -. [ Abstract ] [International Conference Nuclear Energy for New Europe. Blend (SI), 05.09.2005-08.09.2005]
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]
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]
Pánek R., Pitts R. A., Gunn J. P., Erents S. K.: Particle-in-cell simulations of the impact of retarding field analyser probe head geometry on ion saturation current measurements. Czechoslovak Journal of Physics 54 [suppl.C] (2004) C150-C156. [ Abstract ] [Symposium on Plasma Physics and Technology /21./. 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]
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]