Integration of full divertor detachment with improved core confinement for tokamak fusion plasmas
Abstract
Divertor detachment offers a promising solution to the challenge of plasma-wall interactions for steady-state operation of fusion reactors. Here, we demonstrate the excellent compatibility of actively controlled full divertor detachment with a high-performance (βN ~ 3, H98 ~ 1.5) core plasma, using high-βp (poloidal beta, βp > 2) scenario characterized by a sustained core internal transport barrier (ITB) and a modest edge transport barrier (ETB) in DIII-D tokamak. The high-βp high-confinement scenario facilitates divertor detachment which, in turn, promotes the development of an even stronger ITB at large radius with a weaker ETB. This self-organized synergy between ITB and ETB, leads to a net gain in energy confinement, in contrast to the net confinement loss caused by divertor detachment in standard H-modes. These results show the potential of integrating excellent core plasma performance with an efficient divertor solution, an essential step towards steady-state operation of reactor-grade plasmas.
- Authors:
-
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- Chinese Academy of Sciences (CAS), Hefei (China)
- General Atomics, San Diego, CA (United States)
- Chinese Academy of Sciences (CAS), Hefei (China); Oak Ridge Associated Univ., Oak Ridge, TN (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA); National Magnetic Confinement Fusion Science Program of China
- OSTI Identifier:
- 1768382
- Alternate Identifier(s):
- OSTI ID: 1845144; OSTI ID: 1871402
- Report Number(s):
- LLNL-JRNL-834527
Journal ID: ISSN 2041-1723; TRN: US2206592
- Grant/Contract Number:
- FC02-04ER54698; AC04-94AL85000; NA0003525; AC52-07NA27344; SC0010685; 2017YFE0301300; 2017YFE0300404
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Magnetically confined plasmas; Nuclear fusion and fission; Techniques and instrumentation
Citation Formats
Wang, L., Wang, H. Q., Ding, S., Garofalo, A. M., Gong, X. Z., Eldon, D., Guo, H. Y., Leonard, A. W., Hyatt, A. W., Qian, J. P., Weisberg, D. B., McClenaghan, J., Fenstermacher, M. E., Lasnier, C. J., Watkins, J. G., Shafer, M. W., Xu, G. S., Huang, J., Ren, Q. L., Buttery, R. J., Humphreys, D. A., Thomas, D. M., Zhang, B., and Liu, J. B. Integration of full divertor detachment with improved core confinement for tokamak fusion plasmas. United States: N. p., 2021.
Web. doi:10.1038/s41467-021-21645-y.
Wang, L., Wang, H. Q., Ding, S., Garofalo, A. M., Gong, X. Z., Eldon, D., Guo, H. Y., Leonard, A. W., Hyatt, A. W., Qian, J. P., Weisberg, D. B., McClenaghan, J., Fenstermacher, M. E., Lasnier, C. J., Watkins, J. G., Shafer, M. W., Xu, G. S., Huang, J., Ren, Q. L., Buttery, R. J., Humphreys, D. A., Thomas, D. M., Zhang, B., & Liu, J. B. Integration of full divertor detachment with improved core confinement for tokamak fusion plasmas. United States. https://doi.org/10.1038/s41467-021-21645-y
Wang, L., Wang, H. Q., Ding, S., Garofalo, A. M., Gong, X. Z., Eldon, D., Guo, H. Y., Leonard, A. W., Hyatt, A. W., Qian, J. P., Weisberg, D. B., McClenaghan, J., Fenstermacher, M. E., Lasnier, C. J., Watkins, J. G., Shafer, M. W., Xu, G. S., Huang, J., Ren, Q. L., Buttery, R. J., Humphreys, D. A., Thomas, D. M., Zhang, B., and Liu, J. B. 2021.
"Integration of full divertor detachment with improved core confinement for tokamak fusion plasmas". United States. https://doi.org/10.1038/s41467-021-21645-y. https://www.osti.gov/servlets/purl/1768382.
@article{osti_1768382,
title = {Integration of full divertor detachment with improved core confinement for tokamak fusion plasmas},
author = {Wang, L. and Wang, H. Q. and Ding, S. and Garofalo, A. M. and Gong, X. Z. and Eldon, D. and Guo, H. Y. and Leonard, A. W. and Hyatt, A. W. and Qian, J. P. and Weisberg, D. B. and McClenaghan, J. and Fenstermacher, M. E. and Lasnier, C. J. and Watkins, J. G. and Shafer, M. W. and Xu, G. S. and Huang, J. and Ren, Q. L. and Buttery, R. J. and Humphreys, D. A. and Thomas, D. M. and Zhang, B. and Liu, J. B.},
abstractNote = {Divertor detachment offers a promising solution to the challenge of plasma-wall interactions for steady-state operation of fusion reactors. Here, we demonstrate the excellent compatibility of actively controlled full divertor detachment with a high-performance (βN ~ 3, H98 ~ 1.5) core plasma, using high-βp (poloidal beta, βp > 2) scenario characterized by a sustained core internal transport barrier (ITB) and a modest edge transport barrier (ETB) in DIII-D tokamak. The high-βp high-confinement scenario facilitates divertor detachment which, in turn, promotes the development of an even stronger ITB at large radius with a weaker ETB. This self-organized synergy between ITB and ETB, leads to a net gain in energy confinement, in contrast to the net confinement loss caused by divertor detachment in standard H-modes. These results show the potential of integrating excellent core plasma performance with an efficient divertor solution, an essential step towards steady-state operation of reactor-grade plasmas.},
doi = {10.1038/s41467-021-21645-y},
url = {https://www.osti.gov/biblio/1768382},
journal = {Nature Communications},
issn = {2041-1723},
number = 1,
volume = 12,
place = {United States},
year = {Mon Mar 01 00:00:00 EST 2021},
month = {Mon Mar 01 00:00:00 EST 2021}
}
Works referenced in this record:
Observation of Continuous Divertor Detachment in -Mode Discharges in ASDEX Upgrade
journal, May 1995
- Gruber, O.; Kallenbach, A.; Kaufmann, M.
- Physical Review Letters, Vol. 74, Issue 21
Reconstruction of current profile parameters and plasma shapes in tokamaks
journal, November 1985
- Lao, L. L.; St. John, H.; Stambaugh, R. D.
- Nuclear Fusion, Vol. 25, Issue 11
Achievement of High Fusion Performance in JT-60U Reversed Shear Discharges
journal, November 1997
- Ishida, S.; Fujita, T.; Akasaka, H.
- Physical Review Letters, Vol. 79, Issue 20
Separating divertor closure effects on divertor detachment and pedestal shape in DIII-D
journal, March 2020
- Moser, A. L.; Casali, L.; Covele, B. M.
- Physics of Plasmas, Vol. 27, Issue 3
DIII-D research towards establishing the scientific basis for future fusion reactors
journal, June 2019
- Petty, C. C.
- Nuclear Fusion, Vol. 59, Issue 11
Initial results of the high resolution edge Thomson scattering upgrade at DIII-D
journal, October 2012
- Eldon, D.; Bray, B. D.; Deterly, T. M.
- Review of Scientific Instruments, Vol. 83, Issue 10
Heat flux mitigation by impurity seeding in high-field tokamaks
journal, January 2017
- Reinke, M. L.
- Nuclear Fusion, Vol. 57, Issue 3
Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state
journal, March 2017
- Qian, J. P.; Garofalo, A. M.; Gong, X. Z.
- Nuclear Fusion, Vol. 57, Issue 5
Progress in extending high poloidal beta scenarios on DIII-D towards a steady-state fusion reactor and impact of energetic particles
journal, September 2020
- Huang, J.; Garofalo, A. M.; Qian, J. P.
- Nuclear Fusion, Vol. 60, Issue 12
Neoclassical conductivity and bootstrap current formulas for general axisymmetric equilibria and arbitrary collisionality regime
journal, July 1999
- Sauter, O.; Angioni, C.; Lin-Liu, Y. R.
- Physics of Plasmas, Vol. 6, Issue 7
Divertor studies in nitrogen induced completely detached H-modes in full tungsten ASDEX Upgrade
journal, February 2015
- Reimold, F.; Wischmeier, M.; Bernert, M.
- Nuclear Fusion, Vol. 55, Issue 3
Review of MARFE phenomena in tokamaks
journal, February 1987
- Lipschultz, B.
- Journal of Nuclear Materials, Vol. 145-147
Developments towards an ELM-free pedestal radiative cooling scenario using noble gas seeding in ASDEX Upgrade
journal, September 2020
- Kallenbach, Arne; Bernert, Matthias; David, Pierre
- Nuclear Fusion
The dominant micro-turbulence instabilities in the lower q 95 high β p plasmas on DIII-D and predict-first extrapolation
journal, November 2019
- Ding, S.; Jian, X.; Garofalo, A. M.
- Nuclear Fusion, Vol. 60, Issue 1
The role of the density profile in the ASDEX-Upgrade pedestal structure
journal, October 2016
- Dunne, M. G.; Potzel, S.; Reimold, F.
- Plasma Physics and Controlled Fusion, Vol. 59, Issue 1
A high-accuracy Eulerian gyrokinetic solver for collisional plasmas
journal, November 2016
- Candy, J.; Belli, E. A.; Bravenec, R. V.
- Journal of Computational Physics, Vol. 324
Physics basis for the first ITER tungsten divertor
journal, August 2019
- Pitts, R. A.; Bonnin, X.; Escourbiac, F.
- Nuclear Materials and Energy, Vol. 20
Investigations of impurity seeding and radiation control for long-pulse and high-density H-mode plasmas in JT-60U
journal, September 2009
- Asakura, N.; Nakano, T.; Oyama, N.
- Nuclear Fusion, Vol. 49, Issue 11
Internal transport barrier on q =3 surface and poloidal plasma spin up in JT-60U high- discharges
journal, June 1994
- Koide, Y.; Kikuchi, M.; Mori, M.
- Physical Review Letters, Vol. 72, Issue 23
Multichordal charge‐exchange recombination spectroscopy on the DIII‐D tokamak
journal, August 1986
- Seraydarian, Raymond P.; Burrell, Keith H.
- Review of Scientific Instruments, Vol. 57, Issue 8
Transport at high ${\beta_p}$ and development of candidate steady state scenarios for ITER
journal, March 2020
- McClenaghan, J.; Garofalo, A. M.; Lao, L. L.
- Nuclear Fusion, Vol. 60, Issue 4
Role of Microtearing Turbulence in DIII-D High Bootstrap Current Fraction Plasmas
journal, November 2019
- Jian, X.; Holland, C.; Candy, J.
- Physical Review Letters, Vol. 123, Issue 22
Chapter 2: Plasma confinement and transport
journal, December 1999
- Transport, ITER Physics Expert Group on Confin; Database, ITER Physics Expert Group on Confin; Editors, ITER Physics Basis
- Nuclear Fusion, Vol. 39, Issue 12
Investigation of energy transport in DIII-D High- β P EAST-demonstration discharges with the TGLF turbulent and NEO neoclassical transport models
journal, January 2017
- Pan, C.; Staebler, G. M.; Lao, L. L.
- Nuclear Fusion, Vol. 57, Issue 3
A new scaling for divertor detachment
journal, March 2017
- Goldston, R. J.; Reinke, M. L.; Schwartz, J. A.
- Plasma Physics and Controlled Fusion, Vol. 59, Issue 5
Confinement improvement in the high poloidal beta regime on DIII-D and application to steady-state H-mode on EAST
journal, May 2017
- Ding, S.; Garofalo, A. M.; Qian, J.
- Physics of Plasmas, Vol. 24, Issue 5
Joint DIII-D/EAST research on the development of a high poloidal beta scenario for the steady state missions of ITER and CFETR
journal, November 2017
- Garofalo, A. M.; Gong, X. Z.; Ding, S. Y.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 1
Chapter 6: Steady state operation
journal, June 2007
- Gormezano, C.; Sips, A. C. C.; Luce, T. C.
- Nuclear Fusion, Vol. 47, Issue 6
The tokamak Monte Carlo fast ion module NUBEAM in the National Transport Code Collaboration library
journal, June 2004
- Pankin, Alexei; McCune, Douglas; Andre, Robert
- Computer Physics Communications, Vol. 159, Issue 3
A brief history of nuclear fusion
journal, June 2020
- Barbarino, Matteo
- Nature Physics, Vol. 16, Issue 9
Hydronitrogen Molecular Assisted Recombination (HN-MAR) process in ammonia seeded deuterium plasmas
journal, May 2019
- Abe, S.; Thakur, S. Chakraborty; Doerner, R. P.
- Nuclear Materials and Energy, Vol. 19
Improved core-edge compatibility using impurity seeding in the small angle slot (SAS) divertor at DIII-D
journal, June 2020
- Casali, L.; Osborne, T. H.; Grierson, B. A.
- Physics of Plasmas, Vol. 27, Issue 6
Effects of divertor geometry on H-mode pedestal structure in attached and detached plasmas in the DIII-D tokamak
journal, July 2018
- Wang, H. Q.; Guo, H. Y.; Leonard, A. W.
- Nuclear Fusion, Vol. 58, Issue 9
Chapter 2: Plasma confinement and transport
journal, June 2007
- Physics), E. J. Doyle (Chair Transport; Modelling), W. A. Houlberg (Chair Confinement Da; Edge), Y. Kamada (Chair Pedestal and
- Nuclear Fusion, Vol. 47, Issue 6
Investigating the effect of different impurities on plasma detachment in linear plasma machine Magnum-PSI
journal, October 2019
- Perillo, R.; Chandra, R.; Akkermans, G. R. A.
- Physics of Plasmas, Vol. 26, Issue 10
Plasma detachment in JET Mark I divertor experiments
journal, March 1998
- Loarte, A.; Monk, R. D.; Martín-Solís, J. R.
- Nuclear Fusion, Vol. 38, Issue 3
Basic physical processes and reduced models for plasma detachment
journal, March 2018
- Stangeby, P. C.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 4
A Brief Introduction to the DIII-D Tokamak
journal, October 2005
- Luxon, J. L.
- Fusion Science and Technology, Vol. 48, Issue 2
Langmuir probe array for the DIII‐D divertor
journal, October 1990
- Buchenauer, D.; Hsu, W. L.; Smith, J. P.
- Review of Scientific Instruments, Vol. 61, Issue 10
Shafranov shift bifurcation of turbulent transport in the high β p scenario on DIII-D
journal, September 2019
- McClenaghan, J.; Garofalo, A. M.; Staebler, G. M.
- Nuclear Fusion, Vol. 59, Issue 12
The high field side high density region in SOLPS-modeling of nitrogen-seeded H-modes in ASDEX Upgrade
journal, August 2017
- Reimold, F.; Wischmeier, M.; Potzel, S.
- Nuclear Materials and Energy, Vol. 12
The effect of divertor closure on detachment onset in DIII-D
journal, May 2019
- Moser, A. L.; Leonard, A. W.; McLean, A. G.
- Nuclear Materials and Energy, Vol. 19
Progress toward steady-state tokamak operation exploiting the high bootstrap current fraction regime
journal, June 2016
- Ren, Q. L.; Garofalo, A. M.; Gong, X. Z.
- Physics of Plasmas, Vol. 23, Issue 6
On mechanisms of impurity leakage and retention in the tokamak divertor
journal, March 2019
- Senichenkov, I. Yu; Kaveeva, E. G.; Sytova, E. A.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 4
High performance tokamak operation regimes
journal, December 1999
- Gormezano, C.
- Plasma Physics and Controlled Fusion, Vol. 41, Issue 12B
High fusion performance in Super H-mode experiments on Alcator C-Mod and DIII-D
journal, June 2019
- Snyder, P. B.; Hughes, J. W.; Osborne, T. H.
- Nuclear Fusion, Vol. 59, Issue 8
Power exhaust by SOL and pedestal radiation at ASDEX Upgrade and JET
journal, August 2017
- Bernert, M.; Wischmeier, M.; Huber, A.
- Nuclear Materials and Energy, Vol. 12
High radiation and high density experiments in JT-60U
journal, February 2001
- Kubo, H.; Sakurai, S.; Asakura, N.
- Nuclear Fusion, Vol. 41, Issue 2
Design and operation of the multipulse Thomson scattering diagnostic on DIII‐D (invited)
journal, October 1992
- Carlstrom, T. N.; Campbell, G. L.; DeBoo, J. C.
- Review of Scientific Instruments, Vol. 63, Issue 10
Formation of the internal transport barrier in KSTAR
journal, November 2017
- Chung, J.; Kim, H. S.; Jeon, Y. M.
- Nuclear Fusion, Vol. 58, Issue 1
Partial detachment of high power discharges in ASDEX Upgrade
journal, April 2015
- Kallenbach, A.; Bernert, M.; Beurskens, M.
- Nuclear Fusion, Vol. 55, Issue 5
Edge stability and transport control with resonant magnetic perturbations in collisionless tokamak plasmas
journal, May 2006
- Evans, Todd E.; Moyer, Richard A.; Burrell, Keith H.
- Nature Physics, Vol. 2, Issue 6
Internal transport barriers in tokamak plasmas*
journal, November 2002
- Wolf, R. C.
- Plasma Physics and Controlled Fusion, Vol. 45, Issue 1
A long-pulse high-confinement plasma regime in the Experimental Advanced Superconducting Tokamak
journal, November 2013
- Li, J.; Guo, H. Y.; Wan, B. N.
- Nature Physics, Vol. 9, Issue 12
Compatibility of detached divertor operation with robust edge pedestal performance
journal, August 2015
- Leonard, A. W.; Makowski, M. A.; McLean, A. G.
- Journal of Nuclear Materials, Vol. 463
Compatibility of internal transport barrier with steady-state operation in the high bootstrap fraction regime on DIII-D
journal, November 2015
- Garofalo, A. M.; Gong, X.; Grierson, B. A.
- Nuclear Fusion, Vol. 55, Issue 12
Recent advances in EAST physics experiments in support of steady-state operation for ITER and CFETR
journal, June 2019
- Wan, B. N.; Liang, Y.; Gong, X. Z.
- Nuclear Fusion, Vol. 59, Issue 11
Relationship between particle and heat transport in JT-60U plasmas with internal transport barrier
journal, October 2003
- Takenaga, H.; Higashijima, S.; Oyama, N.
- Nuclear Fusion, Vol. 43, Issue 10
Transport barriers in bootstrap-driven tokamaks
journal, May 2018
- Staebler, G. M.; Garofalo, A. M.; Pan, C.
- Physics of Plasmas, Vol. 25, Issue 5
Electric field-induced plasma convection in tokamak divertors
journal, April 2000
- Boedo, J. A.; Schaffer, M. J.; Maingi, R.
- Physics of Plasmas, Vol. 7, Issue 4
Works referencing / citing this record:
Physics of increased edge electron temperature and density turbulence during ELM-free QH-mode operation on DIII-D
journal, May 2018
- Sung, C.; Rhodes, T. L.; Staebler, G. M.
- Physics of Plasmas, Vol. 25, Issue 5
Hysteresis as a probe of turbulent bifurcation in intrinsic rotation reversals on Alcator C-Mod
journal, August 2019
- Cao, N. M.; Rice, J. E.; Diamond, P. H.
- Nuclear Fusion, Vol. 59, Issue 10
Impact of centrifugal drifts on ion turbulent transport
journal, March 2018
- Belli, E. A.; Candy, J.
- Physics of Plasmas, Vol. 25, Issue 3
The dominant micro-turbulence instabilities in the lower q 95 high β p plasmas on DIII-D and predict-first extrapolation
journal, November 2019
- Ding, S.; Jian, X.; Garofalo, A. M.
- Nuclear Fusion, Vol. 60, Issue 1
H-mode grade confinement in L-mode edge plasmas at negative triangularity on DIII-D
journal, April 2019
- Marinoni, A.; Austin, M. E.; Hyatt, A. W.
- Physics of Plasmas, Vol. 26, Issue 4
Key effects on the confinement improvement of the ASDEX Upgrade hybrid scenario
journal, September 2019
- Jian, Xiang; Chan, Vincent S.; Chen, Jiale
- Nuclear Fusion, Vol. 59, Issue 10
Verification of GENE and GYRO with L-mode and I-mode plasmas in Alcator C-Mod
journal, April 2018
- Mikkelsen, D. R.; Howard, N. T.; White, A. E.
- Physics of Plasmas, Vol. 25, Issue 4
Transport barriers in bootstrap-driven tokamaks
journal, May 2018
- Staebler, G. M.; Garofalo, A. M.; Pan, C.
- Physics of Plasmas, Vol. 25, Issue 5
Reversal of turbulent gyroBohm isotope scaling due to nonadiabatic electron drive
journal, August 2019
- Belli, E. A.; Candy, J.; Waltz, R. E.
- Physics of Plasmas, Vol. 26, Issue 8
Validation of gyrokinetic simulations of a National Spherical Torus eXperiment H-mode plasma and comparisons with a high- k scattering synthetic diagnostic
journal, October 2019
- Ruiz, J. Ruiz; Guttenfelder, W.; White, A. E.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 11
Improved linearized model collision operator for the highly collisional regime
journal, October 2019
- Sugama, H.; Matsuoka, S.; Satake, S.
- Physics of Plasmas, Vol. 26, Issue 10
Safety factor and turbulence dynamics dependence of the L-H power threshold on DIII-D
journal, June 2019
- Yan, Z.; Mckee, G. R.; Gohil, P.
- Physics of Plasmas, Vol. 26, Issue 6
Gyrokinetic GENE simulations of DIII-D near-edge L-mode plasmas
journal, September 2019
- Neiser, T. F.; Jenko, F.; Carter, T. A.
- Physics of Plasmas, Vol. 26, Issue 9
Cross-verification of neoclassical transport solutions from XGCa against NEO
journal, October 2019
- Hager, R.; Dominski, J.; Chang, C. S.
- Physics of Plasmas, Vol. 26, Issue 10