Systematic measurements of the plasma potential and the electron temperature during the L-mode and ELMy H-mode on several large European facilities by using ball-pen probe technique.
Project ID:KJB100430901
Provider:Grant Agency of the Academy of Sciences
Period:Jan 01, 2009 - Dec 31, 2011
Principal Investigator:Mgr. Jiří Adámek, Ph.D.
Co-investigatorsR. Pánek, R. Dejarnac, M. Komm, J. Brotánková, J. Horáček

Aims of the project: The investigation of the electric field, its fluctuations and ExB drifts remains one of the most important tasks in the context of anomalous edge plasma and momentum transport. The ball-pen probe is used for direct measurements of the plasma potential because the electric field and its fluctuations derived from the plasma potential are independent on the electron temperature. Ball-pen probe measures the plasma potential with good time and space resolution and it was already tested on different European facilities (ASDEX Upgrade,RFX,CASTOR). The ball-pen probe combined with Langmuir probe provides also the electron temperature with same parameters. Particular attention will be devoted to the measurements during the ELMy H-mode. The investigation of ELM structures and understanding of their physics is crucial in order to control their impact on the life time of ITER tokamak. The project contains the numerical simulations in code SPICE2 to describe the plasma in the vicinity of the probe.

Results:

Adámek J., Peterka M., Gyergyek T., Kudrna P., Ramisch M., Stroth U., Cavalier J., Tichý M.: Application of the Ball-Pen Probe in Two Low-Temperature Magnetised Plasma Devices and in Torsatron TJ-K. Contributions to Plasma Physics 53 [1] (2013) 39-44. [ Abstract ] [ Link ]
[International Workshop on Electric Probes in Magnetized Plasmas/9./. Iasi, 21.09.2011-23.09.2011]

Adámek J., Peterka M., Gyergyek T., Kudrna P., Tichý M.: Diagnostics of magnetized low temperature plasma by ball-pen probe. Nukleonika 57 [2] (2012) 297-300. [ Abstract ] [ Link ]
[International Conference on Research and Applications of Plasmas (PLASMA). Warsaw, 12.09.2011-16.09.2011]

Weinzettl V., Pánek R., Hron M., Stöckel J., Žáček F., Havlíček J., Bílková P., Naydenkova D., Háček P., Zajac J., Dejarnac R., Horáček J., Adámek J., Mlynář J., Janky F., Aftanas M., Böhm P., Brotánková J., Šesták D., Ďuran I., Melich R., Jareš D., Ghosh J., Anda B., Veres G., Szappanos A., Zoletnik S., Berta M., Shevchenko V. F., Scannell R., Walsh D., Müller H. W., Igochine V., Silva A., Manso M., Gomes R., Popov Tsv., Sarychev D., Kiselov V.K., Nanobashvili S.: Overview of the COMPASS diagnostics. Fusion Engineering and Design 86 [6-8] (2011) 1227-1231. [ Link ]
[Symposium of Fusion Technology (SOFT-26). Porto, 27.09.2010-01.10.2010]

Adámek J., Horáček J., Müller H. W., Schrittwieser R., Tichý M., Nielsen A.H.: Fast ion temperature measurements using ball-pen probes in the SOL of ASDEX Upgrade during L-mode. EPS Europhysics Conference Abstracts Volume 35G – Contributed papers. Mulhouse : European Physical Society, 2011 - (Becoulet, A.; Hoang, T.; Stroth, U.) P1.059-P1.059. ISBN 2-914771-68-1. - (EPS. 35G). [ Abstract ] [ Link ]
[European Physical Society Conference on Plasma Physics /38th./. Strasbourg (FR), 27.06.2011-01.07.2011]

Müller H. W., Adámek J., Cavazzana R., Conway G.D., Fuchs C., Gunn J. P., Herrmann A., Horáček J., Ionita C., Kallenbach A., Kočan M., Maraschek M., Maszl C., Mehlmann F., Nold B., Peterka M., Rohde V., Schweinzer J., Schrittwieser R., Vianello N., Wolfrum E., Zuin M.: Latest investigations on fluctuations, ELM filaments and turbulent transport in the SOL of ASDEX Upgrade. Nuclear Fusion 51 [7] (2011) 073023-073023. [ Abstract ] [ Link ]

Jeništa J., Takana H., Nishiyama H., Bartlová M., Aubrecht V., Křenek P., Hrabovský M., Kavka T., Sember V., Mašláni A.: Numerical Investigation of Hybrid-Stabilized Argon-Water Electric Arc Used for Biomass Gasification. Progress in Biomass and Bioenergy Production. Rijeka : InTech, 2011 - (Shahid Shaukat, S.) S. 63-88. ISBN 978-953-307-491-7 [ Abstract ] [ Link ]

Komm M., Adámek J., Dejarnac R., Gunn J. P., Pekárek Z.: Transport of electrons in the tunnel of an ion sensitive probe. Plasma Physics and Controlled Fusion 53 [1] (2011) 015005-015005. [ Abstract ] [ Link ]

Müller H. W., Adámek J., Cavazzana R., Conway G.D., Fuchs C., Gunn J. P., Herrmann A., Horáček J., Ionita C., Kallenbach A., Kočan M., Maraschek M., Maszl C., Mehlmann F., Nold B., Peterka M., Rohde V., Schweinzer J., Schrittwieser R., Vianello N., Wolfrum E., Zuin M.: Latest investigations on fluctuations, ELM filaments and turbulent transport in the SOL of ASDEX Upgrade. Nuclear Fusion 51 [7] (2011) 073023-073023. [ Link ]
[IAEA Fusion Energy Conference/23rd./. Daejon, 11.10.2010-16.10.2010]

Horáček J., Adámek J., Müller H. W., Seidl J., Nielsen A.H., Rohde V., Mehlmann F., Ionita C., Havlíčková E.: Interpretation of fast measurements of plasma potential, temperature and density. Nuclear Fusion 50 [10] (2010) 105001-105001. [ Abstract ] [ Link ]

Komm M., Adámek J., Pekárek Z., Pánek R.: Particle-In-Cell simulations of the Ball-pen probe. Contributions to Plasma Physics 50 [9] (2010) 814-818. [ Abstract ] [ Link ]

Müller H. W., Adámek J., Horáček J., Ionita C., Mehlmann F., Rohde V., Schrittwieser R.: Towards Fast Measurement of the Electron Temperature in the SOL of ASDEX Upgrade Using Swept Langmuir Probes. Contributions to Plasma Physics 50 [9] (2010) 847-853. [ Abstract ] [ Link ]
[International Workshop on Electric Probes in Magnetized Plasmas/8th./. Innsbruck, 21.09.2009-24.09.2009]

Müller H. W., Adámek J., Cavazzana R., Conway G.D., Gunn J. P., Herrmann A., Horáček J., Ionita C., Kocan M., Maraschek M., Maszl C., Mehlmann F., Nold B., Peterka M., Rohde V., Schrittwieser R., Vianello N., Wolfrum E., Zuin M., ASDEX Upgrade Team.: Fluctuations, ELM Filaments and Turbulent Transport in the SOL at the Outer Midplane of ASDEX Upgrade. Contributed Paper 23rd IAEA Fusion Energy Conference. Vienna : International Atomic Energy Agency (IAEA), 2010. EXD/P3-23. ISBN N. - (IAEA). [ Link ]
[IAEA Fusion Energy Conference /23rd./. Daejon (KR), 11.10.2010-16.10.2010]

Adámek J., Horáček J., Müller H. W., Rohde V., Ionita C., Schrittwieser R., Mehlmann F., Kurzan B., Stöckel J., Dejarnac R., Weinzettl V., Seidl J., Peterka M.: Ball-Pen Probe Measurements in L-Mode and H-Mode on ASDEX Upgrade. Contributions to Plasma Physics 50 [9] (2010) 854-859. [ Abstract ] [ Link ]
[International Workshop on Electric Probes in Magnetized Plasmas/8th./. Innsbruck, 21.09.2009-24.09.2009]

Adámek J., Horáček J., Rohde V., Müller H. W., Ionita C., Schrittwieser R., Mehlmann F., Stöckel J., Weinzettl V., Seidl J., Peterka M.: ELM studies with ball-pen and Langmuir probes on ASDEX Upgrade. Contributed Papers 36th European Physical Society Conference on Plasma Physics. Sofia : European Physical Society, 2009 - (Mateev, M.; Benova, E.) P-1.140. ISBN 2-914771-61-4. - (Europhysics conference abstracts). [ Abstract ] [ Link ]
[European Physical Society Conference on Plasma Physics /36th./. Sofia (BG), 29.06.2009-03.07.2009]