An ITPA joint experiment to study runaway electron generation and suppression
Abstract
Recent results from an ITPA joint experiment to study the onset, growth, and decay of relativistic electrons (REs) indicate that loss mechanisms other than collisional damping may play a dominant role in the dynamics of the RE population, even during the quiescent Ip flattop. Understanding the physics of RE growth and mitigation is motivated by the theoretical prediction that disruptions of full-current (15 MA) ITER discharges could generate up to 10 MA of REs with 10-20 MeV energies. The ITPA MHD group is conducting a joint experiment to measure the RE detection threshold conditions on a number of tokamaks under quasi-steady-state conditions in which Vloop, ne, and REs can be well-diagnosed and compared to collisional theory. Data from DIII-D, C-Mod, FTU, KSTAR, and TEXTOR have been obtained so far, and the consensus to date is that the threshold E-field is significantly higher than predicted by relativistic collisional theory, or conversely, the density required to damp REs is significantly less than predicted, which could have significant implications for RE mitigation on ITER.
- Authors:
-
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Associazione Euratom-ENEA sulla Fusione, C.R. Frascati, Roma (Italy)
- National Fusion Research Inst., Daejeon (Korea); Univ. of Science and Technology, Daejeon (Korea). Dept. of Nuclear Fusion and Plasma Science
- Forschungszentrum Julich (Germany). Inst. fur Energie- und Klimaforschung (IEK)-Plasmaphysik
- ITER Organization, St. Paul Lez Durance (France)
- Univ. Carlos III de Madrid (Spain)
- Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
- National Fusion Research Inst., Daejeon (Korea)
- General Atomics, San Diego, CA (United States)
- Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE
- Contributing Org.:
- ITPA MHD Group
- OSTI Identifier:
- 1376053
- Grant/Contract Number:
- FC02-04ER54698; FC02-99ER54512; AC05-06OR23100
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 21; Journal Issue: 7; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Runaway electrons; Tokamaks; Hard X-rays; Collision theories; Electron energy loss spectroscopy
Citation Formats
Granetz, Robert S., Esposito, B., Kim, J. H., Koslowski, R., Lehnen, M., Martin-Solis, J. R., Paz-Soldan, Carlos, Rhee, T., Wesley, J. C., and Zeng, L. An ITPA joint experiment to study runaway electron generation and suppression. United States: N. p., 2014.
Web. doi:10.1063/1.4886802.
Granetz, Robert S., Esposito, B., Kim, J. H., Koslowski, R., Lehnen, M., Martin-Solis, J. R., Paz-Soldan, Carlos, Rhee, T., Wesley, J. C., & Zeng, L. An ITPA joint experiment to study runaway electron generation and suppression. United States. https://doi.org/10.1063/1.4886802
Granetz, Robert S., Esposito, B., Kim, J. H., Koslowski, R., Lehnen, M., Martin-Solis, J. R., Paz-Soldan, Carlos, Rhee, T., Wesley, J. C., and Zeng, L. Fri .
"An ITPA joint experiment to study runaway electron generation and suppression". United States. https://doi.org/10.1063/1.4886802. https://www.osti.gov/servlets/purl/1376053.
@article{osti_1376053,
title = {An ITPA joint experiment to study runaway electron generation and suppression},
author = {Granetz, Robert S. and Esposito, B. and Kim, J. H. and Koslowski, R. and Lehnen, M. and Martin-Solis, J. R. and Paz-Soldan, Carlos and Rhee, T. and Wesley, J. C. and Zeng, L.},
abstractNote = {Recent results from an ITPA joint experiment to study the onset, growth, and decay of relativistic electrons (REs) indicate that loss mechanisms other than collisional damping may play a dominant role in the dynamics of the RE population, even during the quiescent Ip flattop. Understanding the physics of RE growth and mitigation is motivated by the theoretical prediction that disruptions of full-current (15 MA) ITER discharges could generate up to 10 MA of REs with 10-20 MeV energies. The ITPA MHD group is conducting a joint experiment to measure the RE detection threshold conditions on a number of tokamaks under quasi-steady-state conditions in which Vloop, ne, and REs can be well-diagnosed and compared to collisional theory. Data from DIII-D, C-Mod, FTU, KSTAR, and TEXTOR have been obtained so far, and the consensus to date is that the threshold E-field is significantly higher than predicted by relativistic collisional theory, or conversely, the density required to damp REs is significantly less than predicted, which could have significant implications for RE mitigation on ITER.},
doi = {10.1063/1.4886802},
journal = {Physics of Plasmas},
number = 7,
volume = 21,
place = {United States},
year = {Fri Jul 11 00:00:00 EDT 2014},
month = {Fri Jul 11 00:00:00 EDT 2014}
}
Web of Science
Works referenced in this record:
Experimental Observation of Increased Threshold Electric Field for Runaway Generation due to Synchrotron Radiation Losses in the FTU Tokamak
journal, October 2010
- Martín-Solís, J. R.; Sánchez, R.; Esposito, B.
- Physical Review Letters, Vol. 105, Issue 18
Relativistic limitations on runaway electrons
journal, June 1975
- Connor, J. W.; Hastie, R. J.
- Nuclear Fusion, Vol. 15, Issue 3
Control and dissipation of runaway electron beams created during rapid shutdown experiments in DIII-D
journal, July 2013
- Hollmann, E. M.; Austin, M. E.; Boedo, J. A.
- Nuclear Fusion, Vol. 53, Issue 8
Electron and Ion Runaway in a Fully Ionized Gas. II
journal, January 1960
- Dreicer, H.
- Physical Review, Vol. 117, Issue 2
Experiments in DIII-D toward achieving rapid shutdown with runaway electron suppression
journal, May 2010
- Hollmann, E. M.; Commaux, N.; Eidietis, N. W.
- Physics of Plasmas, Vol. 17, Issue 5
Chapter 3: MHD stability, operational limits and disruptions
journal, June 2007
- Hender, T. C.; Wesley, J. C.; Bialek, J.
- Nuclear Fusion, Vol. 47, Issue 6
Growth and decay of runaway electrons above the critical electric field under quiescent conditions
journal, February 2014
- Paz-Soldan, C.; Eidietis, N. W.; Granetz, R.
- Physics of Plasmas, Vol. 21, Issue 2
Theory for avalanche of runaway electrons in tokamaks
journal, October 1997
- Rosenbluth, M. N.; Putvinski, S. V.
- Nuclear Fusion, Vol. 37, Issue 10
Works referencing / citing this record:
20 years of research on the Alcator C-Mod tokamaka)
journal, November 2014
- Greenwald, M.; Bader, A.; Baek, S.
- Physics of Plasmas, Vol. 21, Issue 11
Resolving runaway electron distributions in space, time, and energy
journal, May 2018
- Paz-Soldan, C.; Cooper, C. M.; Aleynikov, P.
- Physics of Plasmas, Vol. 25, Issue 5
Study of runaway electrons in TUMAN-3M tokamak plasmas
journal, May 2018
- Shevelev, A.; Khilkevitch, E.; Tukachinsky, A.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 7
Effect of partially ionized impurities and radiation on the effective critical electric field for runaway generation
journal, June 2018
- Hesslow, L.; Embréus, O.; Wilkie, G. J.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 7
Runaway electron experiments at COMPASS in support of the EUROfusion ITER physics research
journal, November 2018
- Mlynar, J.; Ficker, O.; Macusova, E.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 1
Spatiotemporal evolution of runaway electrons from synchrotron images in Alcator C-Mod
journal, October 2018
- Tinguely, R. A.; Granetz, R. S.; Hoppe, M.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 12
The role of kinetic instabilities in formation of the runaway electron current after argon injection in DIII-D
journal, November 2018
- Lvovskiy, A.; Paz-Soldan, C.; Eidietis, N. W.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 12
Full suppression of runaway electron generation by the mode penetration of resonant magnetic perturbations during disruptions on J-TEXT
journal, January 2019
- Lin, Z. F.; Chen, Z. Y.; Huang, D. W.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 2
Kink instabilities of the post-disruption runaway electron beam at low safety factor
journal, March 2019
- Paz-Soldan, C.; Eidietis, N. W.; Liu, Y. Q.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 5
The effect of resonant magnetic perturbation on the electron density threshold of runaway electron generation during disruptions on J-TEXT
journal, December 2019
- Lin, Z. F.; Tong, R. H.; Chen, Z. Y.
- Plasma Physics and Controlled Fusion, Vol. 62, Issue 2
Measurements of runaway electron synchrotron spectra at high magnetic fields in Alcator C-Mod
journal, June 2018
- Tinguely, R. A.; Granetz, R. S.; Hoppe, M.
- Nuclear Fusion, Vol. 58, Issue 7
Observation of toroidal Alfvén eigenmode excited by energetic electrons induced by static magnetic perturbations in the EAST tokamak
journal, August 2018
- Chu, N.; Sun, Y.; Gu, S.
- Nuclear Fusion, Vol. 58, Issue 10
DIII-D research towards establishing the scientific basis for future fusion reactors
journal, June 2019
- Petty, C. C.
- Nuclear Fusion, Vol. 59, Issue 11
Physics of runaway electrons in tokamaks
journal, June 2019
- Breizman, Boris N.; Aleynikov, Pavel; Hollmann, Eric M.
- Nuclear Fusion, Vol. 59, Issue 8
First Direct Observation of Runaway-Electron-Driven Whistler Waves in Tokamaks
journal, April 2018
- Spong, D. A.; Heidbrink, W. W.; Paz-Soldan, C.
- Physical Review Letters, Vol. 120, Issue 15
Spatiotemporal evolution of runaway electrons from synchrotron images in Alcator C-Mod
text, January 2018
- Tinguely, R. A.; Granetz, R. S.; Hoppe, M.
- arXiv