SPECTRA ANALYSIS OF RUNAWAY ELECTRON SYNCHROTRON RADIATION FOR THE RECENT EAST RUNAWAY EXPERIMENT
Keywords:
synchrotron radiation, diagnostic runaway electrons, tokamak safety operation, EAST tokamak
Abstract
The energy of disruption generated runaway electrons can reach as high as tens of megaelectronvolt and they can cause a serious damage of plasma-facing-component surfaces in large tokamaks like International Thermonuclear Experimental Reactor (ITER). The synchrotron radiation diagnostic allows a direct observation of such runaway electrons and an analysis of their parameters and promotes the safety operation of present day large tokamaks and future ITER. Only this diagnostic will be applied in ITER. In the paper detail analysis of the synchrotron radiation spectra of runaway electrons for the recent Experimental Advanced Superconducting Tokamak (EAST, Institute of Plasma Physics of Chinese Academy of Sciences) experiment parameters has been presented. The calculations are carried out on the base of precise expression for synchrotron radiation spectral density. They make more precise spectra analysis of the previous paper by Zhou R.J., Pankratov I.M., Hu L.Q., et al. (Physics of Plasmas, 2014, Vol. 21, No. 6, 063302). Obtained results are important for correct interpretation of runaway EAST experiments and runaway experiments in other tokamaks.
Downloads
Download data is not yet available.
References
1. Progress in the ITER physics basis. Chapter 3: MHD stability, operational limits and disruptions // Nuclear Fusion. – 2007. – Vol. 47. – No. 6. – P. 128-202.
2. Jaspers R., Lopes Cardozo N.J., Donne A.J.H., et al. A synchrotron radiation diagnostic to observe relativistic runaway electrons in tokamak plasma // Review Sci. Instruments. 2001. Vol. 72-II. – No.1. P. 466-470.
3. Finken K.H., Watkins J.G., Rusbuldt D., et al. Observation of infrared synchrotron radiation from tokamak runaway electrons in TEXTOR // Nuclear Fusion. 1990. Vol. 30. – No.5. P. 859-870.
4. ITER physics basis, chapter 7: measurement of plasma parameters // Nuclear Fusion. 1999. Vol.39. – No. 12. P. 2541-2575.
5. Pankratov I.M. Analysis of the synchrotron radiation spectra of runaway electrons // Plasma Physics Reports. 1999. Vol. 25. – No. 2. P. 145-148.
6. Reux C., Plyusnin V., Alper B., et al. Runaway electron beam generation and mitigation during disruptions at JET-ILW // Nuclear Fusion. – 2015. – Vol. 55. –No. 9. – 093013.
7. Yoshino R., Tokudo S., Kawano Y. Generation and termination of runaway electrons at major disruptions in JT-60U // Nuclear Fusion. – 1999. – Vol. 39. – No. 2. – P. 151-161.
8. Yu J.H., Hollmann E.M., Commaux N., et al. Visible imaging and spectroscopy of disruption runaway electrons in DIII-D // Physics of Plasmas. – 2013. – Vol. 20. – No. 4. – 042113.
9. England A.C., Chen Z.Y., Seo D.C., et al. Runaway electron suppression by ECRH and RMP in KSTAR // Plasma Science and Technology. – 2013. – Vol. 15. – No. 2. – P. 119-122.
10. Zhou R.J., Hu L.Q., Li E.Z. et al. Investigation of ring-like runaway electron beams in the EAST tokamak // Plasma Phys. Control. Fusion. 2013. Vol.55. – No. 5. 055006.
11. Zhou R.J., Pankratov I.M., Hu L.Q., et al. Synchrotron radiation spectra and synchrotron radiation spot shape of runaway electrons in Experimental Advanced Superconducting Tokamak // Physics of Plasmas. – 2014. – Vol. 21. – No. 6. – 063302.
12. Pankratov I.M., Pavlenko I.V., Pomazan O.A. Analysis of synchrotron radiation emitted by runaway electrons in tokamaks // The Journal of Kharkiv National University, physical series “Nuclei, Particles, Fields”. – 2013. – No.1059. – Iss. 39. – P. 39-45.
13. Olver F.W. Asymptotics and Special Functions. Natick: A K Peters, 1997. 592 p.
14. Schwinger J. On the classical radiation on accelerated electrons // Phys. Review. 1949. Vol. 75. – No. 12. P. 1912-1925.
2. Jaspers R., Lopes Cardozo N.J., Donne A.J.H., et al. A synchrotron radiation diagnostic to observe relativistic runaway electrons in tokamak plasma // Review Sci. Instruments. 2001. Vol. 72-II. – No.1. P. 466-470.
3. Finken K.H., Watkins J.G., Rusbuldt D., et al. Observation of infrared synchrotron radiation from tokamak runaway electrons in TEXTOR // Nuclear Fusion. 1990. Vol. 30. – No.5. P. 859-870.
4. ITER physics basis, chapter 7: measurement of plasma parameters // Nuclear Fusion. 1999. Vol.39. – No. 12. P. 2541-2575.
5. Pankratov I.M. Analysis of the synchrotron radiation spectra of runaway electrons // Plasma Physics Reports. 1999. Vol. 25. – No. 2. P. 145-148.
6. Reux C., Plyusnin V., Alper B., et al. Runaway electron beam generation and mitigation during disruptions at JET-ILW // Nuclear Fusion. – 2015. – Vol. 55. –No. 9. – 093013.
7. Yoshino R., Tokudo S., Kawano Y. Generation and termination of runaway electrons at major disruptions in JT-60U // Nuclear Fusion. – 1999. – Vol. 39. – No. 2. – P. 151-161.
8. Yu J.H., Hollmann E.M., Commaux N., et al. Visible imaging and spectroscopy of disruption runaway electrons in DIII-D // Physics of Plasmas. – 2013. – Vol. 20. – No. 4. – 042113.
9. England A.C., Chen Z.Y., Seo D.C., et al. Runaway electron suppression by ECRH and RMP in KSTAR // Plasma Science and Technology. – 2013. – Vol. 15. – No. 2. – P. 119-122.
10. Zhou R.J., Hu L.Q., Li E.Z. et al. Investigation of ring-like runaway electron beams in the EAST tokamak // Plasma Phys. Control. Fusion. 2013. Vol.55. – No. 5. 055006.
11. Zhou R.J., Pankratov I.M., Hu L.Q., et al. Synchrotron radiation spectra and synchrotron radiation spot shape of runaway electrons in Experimental Advanced Superconducting Tokamak // Physics of Plasmas. – 2014. – Vol. 21. – No. 6. – 063302.
12. Pankratov I.M., Pavlenko I.V., Pomazan O.A. Analysis of synchrotron radiation emitted by runaway electrons in tokamaks // The Journal of Kharkiv National University, physical series “Nuclei, Particles, Fields”. – 2013. – No.1059. – Iss. 39. – P. 39-45.
13. Olver F.W. Asymptotics and Special Functions. Natick: A K Peters, 1997. 592 p.
14. Schwinger J. On the classical radiation on accelerated electrons // Phys. Review. 1949. Vol. 75. – No. 12. P. 1912-1925.
Published
2017-10-20
Cited
How to Cite
Pankratov, I. M., & Bochko, V. Y. (2017). SPECTRA ANALYSIS OF RUNAWAY ELECTRON SYNCHROTRON RADIATION FOR THE RECENT EAST RUNAWAY EXPERIMENT. East European Journal of Physics, 4(3), 26-30. https://doi.org/10.26565/2312-4334-2017-3-03
Section
Original Papers
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
