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Title: Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state

Abstract

Recent EAST/DIII-D joint experiments on the high poloidal beta $${{\beta}_{\text{P}}}$$ regime in DIII-D have extended operation with internal transport barriers (ITBs) and excellent energy confinement (H 98y2 ~ 1.6) to higher plasma current, for lower q 95 ≤ 7.0, and more balanced neutral beam injection (NBI) (torque injection < 2 Nm), for lower plasma rotation than previous results. Transport analysis and experimental measurements at low toroidal rotation suggest that the E × B shear effect is not key to the ITB formation in these high $${{\beta}_{\text{P}}}$$ discharges. Experiments and TGLF modeling show that the Shafranov shift has a key stabilizing effect on turbulence. Extrapolation of the DIII-D results using a 0D model shows that with the improved confinement, the high bootstrap fraction regime could achieve fusion gain Q = 5 in ITER at $${{\beta}_{\text{N}}}$$ ~ 2.9 and q 95 ~ 7. With the optimization of q(0), the required improved confinement is achievable when using 1.5D TGLF-SAT1 for transport simulations. Furthermore, results reported in this paper suggest that the DIII-D high $${{\beta}_{\text{P}}}$$ scenario could be a candidate for ITER steady state operation.

Authors:
 [1];  [2];  [1];  [1];  [1];  [2];  [1];  [3];  [1];  [4];  [5];  [6];  [1];  [1];  [2];  [1]
+ Show Author Affiliations
  1. Chinese Academy of Science, Hefei (People's Republic of China)
  2. General Atomics, San Diego, CA (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. Oak Ridge Associated Univ., Oak Ridge, TN (United States)
  6. Univ. of Wisconsin, Madison, WI (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 Nuclear Energy (NE); National Magnetic Confinement Fusion Program of China
OSTI Identifier:
1374829
Alternate Identifier(s):
OSTI ID: 1838265
Report Number(s):
LLNL-JRNL-830401
Journal ID: ISSN 0029-5515
Grant/Contract Number:  
FC02-04ER54698; AC52-07NA27344; FG02-08ER54999; AC02-09CH11466; FG02-07ER54917; FG02-06ER54871; 2015GB102004; 2014GB106002; 2014GB103000
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 57; Journal Issue: 5; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; high bootstrap fraction; steady state; Shafranov shift

Citation Formats

Qian, Jinping P., Garofalo, Andrea M., Gong, Xianzu Z., Ren, Qilong L., Ding, Siye Y., Solomon, Wayne M., Xu, G. S., Grierson, Brian A., Guo, Wenfeng F., Holcomb, Christopher T., McClenaghan, Joseph T., McKee, George R., Pan, Chengkang K., Huang, Juan, Staebler, Gary M., and Wan, Baonian N. Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state. United States: N. p., 2017. Web. doi:10.1088/1741-4326/aa626a.
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Qian, Jinping P., Garofalo, Andrea M., Gong, Xianzu Z., Ren, Qilong L., Ding, Siye Y., Solomon, Wayne M., Xu, G. S., Grierson, Brian A., Guo, Wenfeng F., Holcomb, Christopher T., McClenaghan, Joseph T., McKee, George R., Pan, Chengkang K., Huang, Juan, Staebler, Gary M., & Wan, Baonian N. Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state. United States. https://doi.org/10.1088/1741-4326/aa626a
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Qian, Jinping P., Garofalo, Andrea M., Gong, Xianzu Z., Ren, Qilong L., Ding, Siye Y., Solomon, Wayne M., Xu, G. S., Grierson, Brian A., Guo, Wenfeng F., Holcomb, Christopher T., McClenaghan, Joseph T., McKee, George R., Pan, Chengkang K., Huang, Juan, Staebler, Gary M., and Wan, Baonian N. Mon . "Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state". United States. https://doi.org/10.1088/1741-4326/aa626a. https://www.osti.gov/servlets/purl/1374829.
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@article{osti_1374829,
title = {Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state},
author = {Qian, Jinping P. and Garofalo, Andrea M. and Gong, Xianzu Z. and Ren, Qilong L. and Ding, Siye Y. and Solomon, Wayne M. and Xu, G. S. and Grierson, Brian A. and Guo, Wenfeng F. and Holcomb, Christopher T. and McClenaghan, Joseph T. and McKee, George R. and Pan, Chengkang K. and Huang, Juan and Staebler, Gary M. and Wan, Baonian N.},
abstractNote = {Recent EAST/DIII-D joint experiments on the high poloidal beta ${{\beta}_{\text{P}}}$ regime in DIII-D have extended operation with internal transport barriers (ITBs) and excellent energy confinement (H 98y2 ~ 1.6) to higher plasma current, for lower q 95 ≤ 7.0, and more balanced neutral beam injection (NBI) (torque injection < 2 Nm), for lower plasma rotation than previous results. Transport analysis and experimental measurements at low toroidal rotation suggest that the E × B shear effect is not key to the ITB formation in these high ${{\beta}_{\text{P}}}$ discharges. Experiments and TGLF modeling show that the Shafranov shift has a key stabilizing effect on turbulence. Extrapolation of the DIII-D results using a 0D model shows that with the improved confinement, the high bootstrap fraction regime could achieve fusion gain Q = 5 in ITER at ${{\beta}_{\text{N}}}$ ~ 2.9 and q 95 ~ 7. With the optimization of q(0), the required improved confinement is achievable when using 1.5D TGLF-SAT1 for transport simulations. Furthermore, results reported in this paper suggest that the DIII-D high ${{\beta}_{\text{P}}}$ scenario could be a candidate for ITER steady state operation.},
doi = {10.1088/1741-4326/aa626a},
journal = {Nuclear Fusion},
number = 5,
volume = 57,
place = {United States},
year = {Mon Mar 20 00:00:00 EDT 2017},
month = {Mon Mar 20 00:00:00 EDT 2017}
}
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Publisher's Version of Record
https://doi.org/10.1088/1741-4326/aa626a
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Works referenced in this record:

An Eulerian gyrokinetic-Maxwell solver
journal, April 2003

Tokamak profile prediction using direct gyrokinetic and neoclassical simulation
journal, June 2009

  • Candy, J.; Holland, C.; Waltz, R. E.
  • Physics of Plasmas, Vol. 16, Issue 6
  • DOI: 10.1063/1.3167820

Separation of β̄ p and ℓ i in tokamaks of non-circular cross-section
journal, October 1985

A new paradigm for E × B velocity shear suppression of gyro-kinetic turbulence and the momentum pinch
journal, September 2013

Gyrofluid simulations of turbulence suppression in reversed-shear experiments on the Tokamak Fusion Test Reactor
journal, May 1997

  • Beer, M. A.; Hammett, G. W.; Rewoldt, G.
  • Physics of Plasmas, Vol. 4, Issue 5
  • DOI: 10.1063/1.872279

Compatibility of internal transport barrier with steady-state operation in the high bootstrap fraction regime on DIII-D
journal, November 2015

Chapter 6: Steady state operation
journal, June 2007

Advances towards QH-mode viability for ELM-stable operation in ITER
journal, July 2011

Fusion Nuclear Science Facility Candidates
journal, February 2011

  • Stambaugh, R. D.; Chan, V. S.; Garofalo, A. M.
  • Fusion Science and Technology, Vol. 59, Issue 2
  • DOI: 10.13182/FST59-279

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
  • DOI: 10.1063/1.4948724
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    Works referencing / citing this record:

    Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges
    journal, April 2018

    • Wu, M. Q.; Pan, C. K.; Chan, V. S.
    • Physics of Plasmas, Vol. 25, Issue 4
    • DOI: 10.1063/1.5024405

    Study of Alfven eigenmodes stability in plasma with multiple NBI driven energetic particle species
    journal, June 2019

    • Varela, J.; Spong, D. A.; Garcia, L.
    • Physics of Plasmas, Vol. 26, Issue 6
    • DOI: 10.1063/1.5098347

    Transport barriers in bootstrap-driven tokamaks
    journal, May 2018

    • Staebler, G. M.; Garofalo, A. M.; Pan, C.
    • Physics of Plasmas, Vol. 25, Issue 5
    • DOI: 10.1063/1.5019282
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