1. bookVolume 60 (2015): Issue 2 (June 2015)
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
access type Open Access

First dedicated observations of runaway electrons in the COMPASS tokamak

Published Online: 22 Jun 2015
Volume & Issue: Volume 60 (2015) - Issue 2 (June 2015)
Page range: 249 - 255
Received: 12 Jun 2014
Accepted: 20 Oct 2014
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
Abstract

Runaway electrons present an important part of the present efforts in nuclear fusion research with respect to the potential damage of the in-vessel components. The COMPASS tokamak a suitable tool for the studies of runaway electrons, due to its relatively low vacuum safety constraints, high experimental flexibility and the possibility of reaching the H-mode D-shaped plasmas. In this work, results from the first experimental COMPASS campaign dedicated to runaway electrons are presented and discussed in preliminary way. In particular, the first observation of synchrotron radiation and rather interesting raw magnetic data are shown.

Keywords

1. Kikuchi, M., Lackner, K., & Tran, M. Q. (2012). Fusion physics (pp. 352–353). Vienna: IAEA.Search in Google Scholar

2. Pánek, R., Bilyková, P., Fuchs, V., Hron, M., Chráska, P., Pavlo, P., Stockel, J., Urban, J., Weinzettl, V., Zajac, J., & Zacek, F. (2006). Reinstallation of the COMPASS-D tokamak in IPP ASCR. Czech. J. Phys., 56(Suppl. 2), B125–B137. DOI: 10.1007/s10582-006-0188-1.10.1007/s10582-006-0188-1Search in Google Scholar

3. Wilson, C. T. R. (1925). The acceleration of β-particles in strong electric fields such as those of Thunderclouds. Proc. Cambridge Philos. Soc., 22(04), 534–538. DOI: 10.1017/S0305004100003236.10.1017/S0305004100003236Search in Google Scholar

4. Solis, J. R. (2012, November 20). Disruption and runaway electrons in tokamaks. Lecture notes distributed in the unit Plasma Physics and Fusion Seminars, Universidad Carlos III de Madrid, Madrid, Spain.Search in Google Scholar

5. Dreicer, H. (1959). Electron and ion runaway in a fully ionized gas I. Phys. Rev., 115(2), 238–249. DOI: 10.1103/PhysRev.115.238.10.1103/PhysRev.115.238Search in Google Scholar

6. Connor, J. W., & Hestie, R. J. (1975). Relativistic limitations on runaway electrons. Nucl. Fusion, 15(3), 415–424. DOI: 10.1088/0029-5515/15/3/007.10.1088/0029-5515/15/3/007Search in Google Scholar

7. Fernandez-Gomez, I., Martin-Solis, J. R., & Sanchez, R. (2012). Perpendicular dynamics of runaway electrons in tokamak plasmas. Phys. Plasmas, 19, 102504. DOI: 10.1063/1.4757644.10.1063/1.4757644Search in Google Scholar

8. Eriksson, L. -G., Helander, P., Andersson, F., Anderson, D., & Lisak, M. (2004). Current dynamics during disruptions in large tokamaks. Phys. Rev. Lett., 92(20), 205004. DOI: 10.1103/PhysRev-Lett.92.205004.Search in Google Scholar

9. Lu, H. W., Hu, L. Q., Li, Y. D., Zhong, G. Q., Lin, S. Y., Xu, P., & EAST Team. (2010). Investigation of fast pitch angle scattering of runaway electrons in the EAST tokamak. Chinese Phys. Lett., 19(12), 125201. DOI: 10.1088/1674-1056/19/12/125201.10.1088/1674-1056/19/12/125201Search in Google Scholar

10. Chen, Z. Y., Wan, B. N., Ling, B. L., Gao, X., Du, Q., Ti, A., Lin, S. Y., & Sajjad, S. (2007). Runaway electron beam instability in slide-away discharges in the HT-7 tokamak. Chinese Phys. Lett., 24(11), 3195–3198. DOI: 10.1088/0256-307X/24/11/048.10.1088/0256-307X/24/11/048Search in Google Scholar

11. Knoepfel, H., & Spong, D. A. (1979). Runaway electrons in toroidal discharges. Nucl. Fusion, 19(6), 785–829. DOI: 10.1088/0029-5515/19/6/008.10.1088/0029-5515/19/6/008Search in Google Scholar

12. Papřok, R., Havlíček, J., Hron, M., Janky, F., Krlín, L., Stökel, J., & Kocmanová, L. (2012). Runaway electrons in COMPASS tokamak. In WDS’12 Proceedings, 29 May – 1 June 2012 (pp. 228–232). Prague, Czech Republic: Charles University.Search in Google Scholar

13. Gill, R. D., Alper, B., de Baar, M., Hender, T. C., Johnson, M. F., Riccardo, V., & contributors to the EFDA-JET Work programme. (2000). Behavior of disruption generated runaways in JET. Nucl. Fusion, 40(8), 1039–1044. DOI: 10.1088/0029-5515/42/8/312.10.1088/0029-5515/42/8/312Search in Google Scholar

14. Jakubowski, L., Plyusnin, V. V., Sadowski, M. J., Zebrowski, J., Malinowski, K., Rabiński, M., Fernandes, H., Silva, C., Duarte, P., & Jakubowski, M. (2012). Estimation of ISTTOK runaway-electrons energies by means of a Cherenkov-type probe with modified AlN radiators. Nukleonika, 57(2), 177–181.Search in Google Scholar

15. Finken, K. H., Watkins, J. G., Rusbüldt, D., Corbett, W. J., Dippel, K. H., Goebel, D. M., & Moyer, R. A. (1990). Observation of infrared synchrotron radiation from tokamak runaway electrons in TEXTOR. Nucl. Fusion, 30(5), 859–870. DOI: 10.1088/0029-5515/30/5/005.10.1088/0029-5515/30/5/005Search in Google Scholar

16. Jaspers, R. (1995). Relativistic runaway electrons in tokamak plasmas. Doctoral thesis, Eindhoven University, The Netherlands.Search in Google Scholar

17. Stahl, A., Landreman, M., Papp, G., Hollmann, E., & Fulop, T. (2013). Synchrotron radiation from a runaway electron distribution in tokamaks. Phys. Plasmas, 20, 093302. DOI: 10.1063/1.4821823.10.1063/1.4821823Search in Google Scholar

18. Havlíček, J., & Hronová, O. (2010). Magnetic diagnostics of COMPASS tokamak. Retrieved June 5th, 2014, from http://www.ipp.cas.cz/Tokamak/euratom/index.php/en/compass-diagnostics/magneticdiagnostics.Search in Google Scholar

19. Papřok, R., Krlín, L., & Stökel, J. (2013). Observation and prediction of runaway electrons in the COMPASS tokamak. In WDS’13 Proceedings, 4–7 June 2013 (pp. 60–66). Prague, Czech Republic: Charles University.Search in Google Scholar

20. Jakubowski, L., Sadowski, M. J., Stanislawski, J., Malinowski, K., Zebrowski, J., Jakuwoski, M., Weinzettl, V., Stökel, J., Vacha, M., & Peterka, M. (2007). Application of Cherenkov detectors for fast electron measurements in CASTOR-tokamak. In 34th EPS Conference on Plasma Physics, 2–6 July 2007 (P- 5.097). Warsaw, Poland: European Physical Society.Search in Google Scholar

21. Jakubowski, L., Sadowski, M. J., Stanislawski, J., Malinowski, K., Zebrowski, J., Jakuwoski, M., Weinzettl, V., Stökel, J., Vacha, M., & Peterka, M. (2008). Cherenkov detector for measurements of fast electrons in CASTOR-tokamak. In AIP’08 Conference Proceedings, 22–24 October 2007 (pp. 219–223). Lisbon, Portugal: American Institute of Physics.Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo