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Title: Stellarator Research Opportunities: A Report of the National Stellarator Coordinating Committee

Abstract

This paper is the product of a stellarator community workshop, organized by the National Stellarator Coordinating Committee and referred to as Stellcon, that was held in Cambridge, Massachusetts in February 2016, hosted by MIT. The workshop was widely advertised, and was attended by 40 scientists from 12 different institutions including national labs, universities and private industry, as well as a representative from the Department of Energy. The final section of this document describes areas of community wide consensus that were developed as a result of the discussions held at that workshop. Areas where further study would be helpful to generate a consensus path forward for the US stellarator program are also discussed. The program outlined in this document is directly responsive to many of the strategic priorities of FES as articulated in “Fusion Energy Sciences: A Ten-Year Perspective (2015–2025)” [1]. The natural disruption immunity of the stellarator directly addresses “Elimination of transient events that can be deleterious to toroidal fusion plasma confinement devices” an area of critical importance for the US fusion energy sciences enterprise over the next decade. Another critical area of research “Strengthening our partnerships with international research facilities,” is being significantly advanced on the W7-X stellarator inmore » Germany and serves as a test-bed for development of successful international collaboration on ITER. Finally, this report also outlines how materials science as it relates to plasma and fusion sciences, another critical research area, can be carried out effectively in a stellarator. Additionally, significant advances along two of the Research Directions outlined in the report; “Burning Plasma Science: Foundations—Next-generation research capabilities”, and “Burning Plasma Science: Long pulse—Sustainment of Long-Pulse Plasma Equilibria” are proposed.« less

Authors:
ORCiD logo [1];  [2];  [2];  [1];  [3];  [4];  [1];  [5];  [5];  [3];  [1];  [2];  [2];  [2];  [5];  [6];  [7];  [6];  [5];  [6] more »;  [8];  [1];  [3];  [9];  [10];  [1];  [10];  [11];  [10];  [10];  [1];  [1];  [2];  [7];  [3];  [10];  [12];  [6];  [2];  [2];  [2];  [4];  [10];  [9];  [1];  [13];  [2];  [14];  [15] « less
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Univ. of Wisconsin, Madison, WI (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. New York Univ. (NYU), NY (United States)
  5. Univ. of Illinois, Urbana, IL (United States)
  6. Auburn Univ., AL (United States)
  7. Columbia Univ., New York, NY (United States)
  8. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  9. Univ. of Maryland, College Park, MD (United States)
  10. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  11. Xantho Technologies, Madison, WI (United States)
  12. Univ. of Montana, Missoula, MT (United States)
  13. General Atomics, San Diego, CA (United States)
  14. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  15. Fusion Theory & Computation, Inc., Kingston, WA (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1429036
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Fusion Energy
Additional Journal Information:
Journal Volume: 37; Journal Issue: 1; Journal ID: ISSN 0164-0313
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 99 GENERAL AND MISCELLANEOUS

Citation Formats

Gates, David A., Anderson, David, Anderson, S., Zarnstorff, M., Spong, Donald A., Weitzner, Harold, Neilson, G. H., Ruzic, D., Andruczyk, D., Harris, J. H., Mynick, H., Hegna, C. C., Schmitz, O., Talmadge, J. N., Curreli, D., Maurer, D., Boozer, A. H., Knowlton, S., Allain, J. P., Ennis, D., Wurden, G., Reiman, A., Lore, J. D., Landreman, Matt, Freidberg, J. P., Hudson, S. R., Porkolab, M., Demers, D., Terry, J., Edlund, E., Lazerson, S. A., Pablant, N., Fonck, R., Volpe, F., Canik, J., Granetz, R., Ware, A., Hanson, J. D., Kumar, S., Deng, C., Likin, K., Cerfon, A., Ram, A., Hassam, A., Prager, S., Paz-Soldan, C., Pueschel, M. J., Joseph, I., and Glasser, A. H. Stellarator Research Opportunities: A Report of the National Stellarator Coordinating Committee. United States: N. p., 2018. Web. doi:10.1007/s10894-018-0152-7.
Gates, David A., Anderson, David, Anderson, S., Zarnstorff, M., Spong, Donald A., Weitzner, Harold, Neilson, G. H., Ruzic, D., Andruczyk, D., Harris, J. H., Mynick, H., Hegna, C. C., Schmitz, O., Talmadge, J. N., Curreli, D., Maurer, D., Boozer, A. H., Knowlton, S., Allain, J. P., Ennis, D., Wurden, G., Reiman, A., Lore, J. D., Landreman, Matt, Freidberg, J. P., Hudson, S. R., Porkolab, M., Demers, D., Terry, J., Edlund, E., Lazerson, S. A., Pablant, N., Fonck, R., Volpe, F., Canik, J., Granetz, R., Ware, A., Hanson, J. D., Kumar, S., Deng, C., Likin, K., Cerfon, A., Ram, A., Hassam, A., Prager, S., Paz-Soldan, C., Pueschel, M. J., Joseph, I., & Glasser, A. H. Stellarator Research Opportunities: A Report of the National Stellarator Coordinating Committee. United States. doi:10.1007/s10894-018-0152-7.
Gates, David A., Anderson, David, Anderson, S., Zarnstorff, M., Spong, Donald A., Weitzner, Harold, Neilson, G. H., Ruzic, D., Andruczyk, D., Harris, J. H., Mynick, H., Hegna, C. C., Schmitz, O., Talmadge, J. N., Curreli, D., Maurer, D., Boozer, A. H., Knowlton, S., Allain, J. P., Ennis, D., Wurden, G., Reiman, A., Lore, J. D., Landreman, Matt, Freidberg, J. P., Hudson, S. R., Porkolab, M., Demers, D., Terry, J., Edlund, E., Lazerson, S. A., Pablant, N., Fonck, R., Volpe, F., Canik, J., Granetz, R., Ware, A., Hanson, J. D., Kumar, S., Deng, C., Likin, K., Cerfon, A., Ram, A., Hassam, A., Prager, S., Paz-Soldan, C., Pueschel, M. J., Joseph, I., and Glasser, A. H. Mon . "Stellarator Research Opportunities: A Report of the National Stellarator Coordinating Committee". United States. doi:10.1007/s10894-018-0152-7. https://www.osti.gov/servlets/purl/1429036.
@article{osti_1429036,
title = {Stellarator Research Opportunities: A Report of the National Stellarator Coordinating Committee},
author = {Gates, David A. and Anderson, David and Anderson, S. and Zarnstorff, M. and Spong, Donald A. and Weitzner, Harold and Neilson, G. H. and Ruzic, D. and Andruczyk, D. and Harris, J. H. and Mynick, H. and Hegna, C. C. and Schmitz, O. and Talmadge, J. N. and Curreli, D. and Maurer, D. and Boozer, A. H. and Knowlton, S. and Allain, J. P. and Ennis, D. and Wurden, G. and Reiman, A. and Lore, J. D. and Landreman, Matt and Freidberg, J. P. and Hudson, S. R. and Porkolab, M. and Demers, D. and Terry, J. and Edlund, E. and Lazerson, S. A. and Pablant, N. and Fonck, R. and Volpe, F. and Canik, J. and Granetz, R. and Ware, A. and Hanson, J. D. and Kumar, S. and Deng, C. and Likin, K. and Cerfon, A. and Ram, A. and Hassam, A. and Prager, S. and Paz-Soldan, C. and Pueschel, M. J. and Joseph, I. and Glasser, A. H.},
abstractNote = {This paper is the product of a stellarator community workshop, organized by the National Stellarator Coordinating Committee and referred to as Stellcon, that was held in Cambridge, Massachusetts in February 2016, hosted by MIT. The workshop was widely advertised, and was attended by 40 scientists from 12 different institutions including national labs, universities and private industry, as well as a representative from the Department of Energy. The final section of this document describes areas of community wide consensus that were developed as a result of the discussions held at that workshop. Areas where further study would be helpful to generate a consensus path forward for the US stellarator program are also discussed. The program outlined in this document is directly responsive to many of the strategic priorities of FES as articulated in “Fusion Energy Sciences: A Ten-Year Perspective (2015–2025)” [1]. The natural disruption immunity of the stellarator directly addresses “Elimination of transient events that can be deleterious to toroidal fusion plasma confinement devices” an area of critical importance for the US fusion energy sciences enterprise over the next decade. Another critical area of research “Strengthening our partnerships with international research facilities,” is being significantly advanced on the W7-X stellarator in Germany and serves as a test-bed for development of successful international collaboration on ITER. Finally, this report also outlines how materials science as it relates to plasma and fusion sciences, another critical research area, can be carried out effectively in a stellarator. Additionally, significant advances along two of the Research Directions outlined in the report; “Burning Plasma Science: Foundations—Next-generation research capabilities”, and “Burning Plasma Science: Long pulse—Sustainment of Long-Pulse Plasma Equilibria” are proposed.},
doi = {10.1007/s10894-018-0152-7},
journal = {Journal of Fusion Energy},
number = 1,
volume = 37,
place = {United States},
year = {2018},
month = {2}
}

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Cited by: 3 works
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Figures / Tables:

Figure 1 Figure 1: Equilbria from a) NCSX, a quasi-axisymmetric plasma, b) W7-X, a quasi-omnigenous plasma, and c) HSX, a quasi-helically symmetric plasma. In all cases the color represents |B| on a flux surface.

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Works referenced in this record:

A reduced fast ion transport model for the tokamak transport code TRANSP
journal, April 2014


Development of Divertor Concept for Optimized Stellarators
journal, January 1992

  • Nührenberg, J.; Strumberger, E.
  • Contributions to Plasma Physics, Vol. 32, Issue 3-4
  • DOI: 10.1002/ctpp.2150320306

Electron temperature gradient driven turbulence
journal, May 2000

  • Jenko, F.; Dorland, W.; Kotschenreuther, M.
  • Physics of Plasmas, Vol. 7, Issue 5
  • DOI: 10.1063/1.874014

On impurity handling in high performance stellarator/heliotron plasmas
journal, April 2009


Measurements, modelling and electron cyclotron heating modification of Alfvén eigenmode activity in DIII-D
journal, April 2009


Overview of TJ-II experiments
journal, October 2005


Comparison between stellarator and tokamak divertor transport
journal, January 2011


Observation of an impurity hole in a plasma with an ion internal transport barrier in the Large Helical Device
journal, May 2009

  • Ida, K.; Yoshinuma, M.; Osakabe, M.
  • Physics of Plasmas, Vol. 16, Issue 5
  • DOI: 10.1063/1.3111097

Edge transport barrier formation and ELM phenomenology in the W7-AS stellarator
journal, March 2001


Class of Model Stellarator Fields with Enhanced Confinement
journal, February 1982


Mitigation of NBI-driven Alfvén eigenmodes by electron cyclotron heating in the TJ-II stellarator
journal, July 2013


On neoclassical impurity transport in stellarator geometry
journal, June 2013


New Advanced Operational Regime on the W7-AS Stellarator
journal, June 2002


Transition from tokamak to stellarator turbulence
journal, November 2000


Plasma equilibrium in a magnetic field with stochastic regions
journal, July 2009

  • Krommes, John A.; Reiman, Allan H.
  • Physics of Plasmas, Vol. 16, Issue 7
  • DOI: 10.1063/1.3159607

Collisionless alpha -particle confinement in stellarators
journal, June 1992


Evaluation of 1/ν neoclassical transport in stellarators
journal, December 1999

  • Nemov, V. V.; Kasilov, S. V.; Kernbichler, W.
  • Physics of Plasmas, Vol. 6, Issue 12
  • DOI: 10.1063/1.873749

Reduced particle and heat transport with quasisymmetry in the Helically Symmetric Experiment
journal, May 2007

  • Canik, J. M.; Anderson, D. T.; Anderson, F. S. B.
  • Physics of Plasmas, Vol. 14, Issue 5
  • DOI: 10.1063/1.2709862

Pressure-induced breaking of equilibrium flux surfaces in the W7AS stellarator
journal, June 2007


ARIES-CS Maintenance System Definition and Analysis
journal, October 2008

  • Waganer, Lester M.; Peipert, Richard J.; Wang, Xueren R.
  • Fusion Science and Technology, Vol. 54, Issue 3
  • DOI: 10.13182/FST08-A1904

Poloidal variation of high- Z impurity density due to hydrogen minority ion cyclotron resonance heating on Alcator C-Mod
journal, March 2012


ARIES-CS Coil Structure Advanced Fabrication Approach
journal, October 2008

  • Waganer, Lester M.; Slattery, Kevin T.; Waldrop, John C.
  • Fusion Science and Technology, Vol. 54, Issue 3
  • DOI: 10.13182/FST08-A1908

Designing ARIES-CS Compact Radial Build and Nuclear System: Neutronics, Shielding, and Activation
journal, October 2008

  • El-Guebaly, L.; Wilson, P.; Henderson, D.
  • Fusion Science and Technology, Vol. 54, Issue 3
  • DOI: 10.13182/FST54-747

International Stellarator/Heliotron Database progress on high-beta confinement and operational boundaries
journal, May 2009


Drift mode calculations in nonaxisymmetric geometry
journal, December 1999

  • Rewoldt, G.; Ku, L. -P.; Tang, W. M.
  • Physics of Plasmas, Vol. 6, Issue 12
  • DOI: 10.1063/1.873757

Stellarator Turbulence: Subdominant Eigenmodes and Quasilinear Modeling
journal, February 2016


Stellarator and tokamak plasmas: a comparison
journal, November 2012


Reducing turbulent transport in toroidal configurations via shaping
journal, May 2011

  • Mynick, H. E.; Pomphrey, N.; Xanthopoulos, P.
  • Physics of Plasmas, Vol. 18, Issue 5
  • DOI: 10.1063/1.3560591

SOL studies for W7-X based on the island divertor concept
journal, July 1996


UWTOR-M-a conceptual design study of a modular stellarator power reactor
journal, December 1981

  • Sviatoslavsky, I.; Van Sciver, S. W.; Kulcinski, G. L.
  • IEEE Transactions on Plasma Science, Vol. 9, Issue 4
  • DOI: 10.1109/TPS.1981.4317421

Stellarators with the magnetic symmetry of a tokamak
journal, July 1996


Physics issues of compact drift optimized stellarators
journal, June 2001


On collisional impurity transport in nonaxisymmetric plasmas
journal, November 2014


Control of power, torque, and instability drive using in-shot variable neutral beam energy in tokamaks
journal, September 2016


3D toroidal physics: Testing the boundaries of symmetry breakinga)
journal, May 2015


Stability of bootstrap current‐driven magnetic islands in stellarators
journal, September 1994

  • Hegna, C. C.; Callen, J. D.
  • Physics of Plasmas, Vol. 1, Issue 9
  • DOI: 10.1063/1.870505

Experimental study of the poloidal flow effect on magnetic island dynamics in LHD and TJ-II
journal, July 2011


First island divertor experiments on the W7-AS stellarator
journal, November 2001


The ARIES-CS Compact Stellarator Fusion Power Plant
journal, October 2008

  • Najmabadi, F.; Raffray, A. R.; Abdel-Khalik, S. I.
  • Fusion Science and Technology, Vol. 54, Issue 3
  • DOI: 10.13182/FST54-655

Central flattening of the fast-ion profile in reversed-shear DIII-D discharges
journal, June 2008


Investigation of ion and electron heat transport of high- T e ECH heated discharges in the large helical device
journal, January 2016


Quasi-helically symmetric toroidal stellarators
journal, May 1988


Optimizing Stellarators for Turbulent Transport
journal, August 2010


3D Divertor Transport Study of the Local Island Divertor Configuration in the Large Helical Device
journal, September 2006

  • Kobayashi, M.; Feng, Y.; Reiter, D.
  • Contributions to Plasma Physics, Vol. 46, Issue 7-9
  • DOI: 10.1002/ctpp.200610039

Physics of the compact advanced stellarator NCSX
journal, November 2001


Transport Optimization and MHD Stability of a Small Aspect Ratio Toroidal Hybrid Stellarator
journal, January 1998


Electromagnetic kinetic toroidal eigenmodes for general magnetohydrodynamic equilibria
journal, January 1982


Optimization activities on design studies of LHD-type reactor FFHR
journal, December 2008


Gyrokinetic Vlasov Code Including Full Three-dimensional Geometry of Experiments
journal, January 2010

  • Nunami, Masanori; Watanabe, Tomo-Hiko; Sugama, Hideo
  • Plasma and Fusion Research, Vol. 5
  • DOI: 10.1585/pfr.5.016

Velocity–space structures of distribution function in toroidal ion temperature gradient turbulence
journal, December 2005


Characterization of energy confinement in net-current free plasmas using the extended International Stellarator Database
journal, November 2005


Marginal stability diagrams for infinite- n ballooning modes in quasi-symmetric stellarators
journal, April 2004


Observation of Critical-Gradient Behavior in Alfvén-Eigenmode-Induced Fast-Ion Transport
journal, February 2016


Physics of island divertors as highlighted by the example of W7-AS
journal, July 2006


Mitigation of Alfvénic activity by 3D magnetic perturbations on NSTX
journal, July 2016


Magnetic geometry and physics of advanced divertors: The X-divertor and the snowflake
journal, October 2013

  • Kotschenreuther, Mike; Valanju, Prashant; Covele, Brent
  • Physics of Plasmas, Vol. 20, Issue 10
  • DOI: 10.1063/1.4824735

Physics Design for ARIES-CS
journal, October 2008

  • Ku, L. P.; Garabedian, P. R.; Lyon, J.
  • Fusion Science and Technology, Vol. 54, Issue 3
  • DOI: 10.13182/FST08-A1899

Comparison of particle trajectories and collision operators for collisional transport in nonaxisymmetric plasmas
journal, April 2014

  • Landreman, M.; Smith, H. M.; Mollén, A.
  • Physics of Plasmas, Vol. 21, Issue 4
  • DOI: 10.1063/1.4870077

Effect of Neoclassical Transport Optimization on Energetic Ion Confinement in LHD
journal, September 2004

  • Murakami, S.; Yamada, H.; Sasao, M.
  • Fusion Science and Technology, Vol. 46, Issue 2
  • DOI: 10.13182/FST04-A561

Transport and isomorphic equilibria
journal, January 1983


Physics of the density limit in the W7-AS stellarator
journal, May 2000


Modular coils and plasma configurations for quasi-axisymmetric stellarators
journal, November 2010


Recent results from the Large Helical Device
journal, March 2003


Electron Temperature Gradient Turbulence
journal, December 2000


Observation of an impurity hole in the Large Helical Device
journal, May 2009


Controlling Turbulence in Present and Future Stellarators
journal, October 2014


Experimental Confirmation of Impurity Convection Driven by the Ion-Temperature Gradient in Toroidal Plasmas
journal, January 2000


Impurities in a non-axisymmetric plasma: Transport and effect on bootstrap current
journal, November 2015

  • Mollén, A.; Landreman, M.; Smith, H. M.
  • Physics of Plasmas, Vol. 22, Issue 11
  • DOI: 10.1063/1.4935901

Geometry dependence of stellarator turbulence
journal, November 2009

  • Mynick, H. E.; Xanthopoulos, P.; Boozer, A. H.
  • Physics of Plasmas, Vol. 16, Issue 11
  • DOI: 10.1063/1.3258848

Magnetic field strength of toroidal plasma equilibria
journal, October 1991

  • Garren, D. A.; Boozer, A. H.
  • Physics of Fluids B: Plasma Physics, Vol. 3, Issue 10
  • DOI: 10.1063/1.859915

Innovations in compact stellarator coil design
journal, March 2001


Helium removal from tokamaks
journal, November 1991


Engineering optimization of stellarator coils lead to improvements in device maintenance
conference, May 2015


Fast particle confinement with optimized coil currents in the W7-X stellarator
journal, April 2014


A geometry interface for gyrokinetic microturbulence investigations in toroidal configurations
journal, August 2009

  • Xanthopoulos, P.; Cooper, W. A.; Jenko, F.
  • Physics of Plasmas, Vol. 16, Issue 8
  • DOI: 10.1063/1.3187907

Obtaining reactor-relevant divertor conditions in tokamaks
journal, April 2011


A review of impurity transport characteristics in the LHD
journal, January 2016


Theory and observations of high frequency Alfv n eigenmodes in low aspect ratio plasmas
journal, March 2003


TEM turbulence optimisation in stellarators
journal, October 2015


Quasilinear carbon transport in an impurity hole plasma in LHD
journal, August 2014

  • Mikkelsen, D. R.; Tanaka, K.; Nunami, M.
  • Physics of Plasmas, Vol. 21, Issue 8
  • DOI: 10.1063/1.4890973

Sensitivity of detachment extent to magnetic configuration and external parameters
journal, April 2016


Experimental divertor physics
journal, June 1997


Low edge safety factor operation and passive disruption avoidance in current carrying plasmas by the addition of stellarator rotational transform
journal, November 2015

  • Pandya, M. D.; ArchMiller, M. C.; Cianciosa, M. R.
  • Physics of Plasmas, Vol. 22, Issue 11
  • DOI: 10.1063/1.4935396

Comparing linear ion-temperature-gradient-driven mode stability of the National Compact Stellarator Experiment and a shaped tokamak
journal, February 2013

  • Baumgaertel, J. A.; Hammett, G. W.; Mikkelsen, D. R.
  • Physics of Plasmas, Vol. 20, Issue 2
  • DOI: 10.1063/1.4791657

Generation and damping of neoclassical plasma flows in stellarators
journal, May 2005


J* optimization of small aspect ratio stellarator/tokamak hybrid devices
journal, May 1998

  • Spong, D. A.; Hirshman, S. P.; Whitson, J. C.
  • Physics of Plasmas, Vol. 5, Issue 5
  • DOI: 10.1063/1.872844

Electron cyclotron heating can drastically alter reversed shear Alfvén eigenmode activity in DIII-D through finite pressure effects
journal, July 2016


Efficient magnetic fields for supporting toroidal plasmas
journal, March 2016

  • Landreman, Matt; Boozer, Allen H.
  • Physics of Plasmas, Vol. 23, Issue 3
  • DOI: 10.1063/1.4943201

Gyrokinetic global three-dimensional simulations of linear ion-temperature-gradient modes in Wendelstein 7-X
journal, June 2004

  • Kornilov, V.; Kleiber, R.; Hatzky, R.
  • Physics of Plasmas, Vol. 11, Issue 6
  • DOI: 10.1063/1.1737393

Observation of the low to high confinement transition in the large helical device
journal, February 2005

  • Toi, K.; Ohdachi, S.; Yamamoto, S.
  • Physics of Plasmas, Vol. 12, Issue 2
  • DOI: 10.1063/1.1843122

Omnigenity as generalized quasisymmetry
journal, May 2012

  • Landreman, Matt; Catto, Peter J.
  • Physics of Plasmas, Vol. 19, Issue 5
  • DOI: 10.1063/1.3693187

Three-dimensional equilibrium of the anisotropic, finite-pressure guiding-center plasma: Theory of the magnetic plasma
journal, January 1975

  • Hall, Laurence S.; McNamara, Brendan
  • Physics of Fluids, Vol. 18, Issue 5
  • DOI: 10.1063/1.861189

A full tungsten divertor for ITER: Physics issues and design status
journal, July 2013


Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER
journal, August 2013


The ∇B drift velocity of trapped particles in stellarators
journal, November 2005

  • Nemov, V. V.; Kasilov, S. V.; Kernbichler, W.
  • Physics of Plasmas, Vol. 12, Issue 11
  • DOI: 10.1063/1.2131848

Stellarator design
journal, December 2015


Sheared flows and transition to improved confinement regime in the TJ-II stellarator
journal, November 2009


Solution of stellarator boundary value problems with external currents
journal, May 1987


BEAMS3D Neutral Beam Injection Model
journal, July 2014


Healing of magnetic islands in stellarators by plasma flow
journal, October 2011


Improving confinement in quasi-axisymmetric stellarators
journal, June 2006

  • Mynick, H. E.; Boozer, A. H.; Ku, L. P.
  • Physics of Plasmas, Vol. 13, Issue 6
  • DOI: 10.1063/1.2213960

Comparison of microinstability properties for stellarator magnetic geometries
journal, October 2005

  • Rewoldt, G.; Ku, L. -P.; Tang, W. M.
  • Physics of Plasmas, Vol. 12, Issue 10
  • DOI: 10.1063/1.2089247

The Helically Symmetric Experiment, (HSX) Goals, Design and Status
journal, April 1995

  • Anderson, F. Simon B.; Almagri, Abdulgader F.; Anderson, David T.
  • Fusion Technology, Vol. 27, Issue 3T
  • DOI: 10.13182/FST95-A11947086

Overview on Wendelstein 7-X Theory
journal, April 1995


    Works referencing / citing this record:

    Magnetic field strength of toroidal plasma equilibria
    journal, October 1991

    • Garren, D. A.; Boozer, A. H.
    • Physics of Fluids B: Plasma Physics, Vol. 3, Issue 10
    • DOI: 10.1063/1.859915

    Velocity–space structures of distribution function in toroidal ion temperature gradient turbulence
    journal, December 2005


    Obtaining reactor-relevant divertor conditions in tokamaks
    journal, April 2011


    Improving confinement in quasi-axisymmetric stellarators
    journal, June 2006

    • Mynick, H. E.; Boozer, A. H.; Ku, L. P.
    • Physics of Plasmas, Vol. 13, Issue 6
    • DOI: 10.1063/1.2213960

    Impurities in a non-axisymmetric plasma: Transport and effect on bootstrap current
    journal, November 2015

    • Mollén, A.; Landreman, M.; Smith, H. M.
    • Physics of Plasmas, Vol. 22, Issue 11
    • DOI: 10.1063/1.4935901

    Mitigation of NBI-driven Alfvén eigenmodes by electron cyclotron heating in the TJ-II stellarator
    journal, July 2013


    Transport and isomorphic equilibria
    journal, January 1983


    Electron cyclotron heating can drastically alter reversed shear Alfvén eigenmode activity in DIII-D through finite pressure effects
    journal, July 2016


    Stellarator and tokamak plasmas: a comparison
    journal, November 2012


    Physics of island divertors as highlighted by the example of W7-AS
    journal, July 2006


    Comparison of particle trajectories and collision operators for collisional transport in nonaxisymmetric plasmas
    journal, April 2014

    • Landreman, M.; Smith, H. M.; Mollén, A.
    • Physics of Plasmas, Vol. 21, Issue 4
    • DOI: 10.1063/1.4870077

    Solution of stellarator boundary value problems with external currents
    journal, May 1987


    Three-dimensional equilibrium of the anisotropic, finite-pressure guiding-center plasma: Theory of the magnetic plasma
    journal, January 1975

    • Hall, Laurence S.; McNamara, Brendan
    • Physics of Fluids, Vol. 18, Issue 5
    • DOI: 10.1063/1.861189

    International Stellarator/Heliotron Database progress on high-beta confinement and operational boundaries
    journal, May 2009


    A reduced fast ion transport model for the tokamak transport code TRANSP
    journal, April 2014


    Sheared flows and transition to improved confinement regime in the TJ-II stellarator
    journal, November 2009


    The ∇B drift velocity of trapped particles in stellarators
    journal, November 2005

    • Nemov, V. V.; Kasilov, S. V.; Kernbichler, W.
    • Physics of Plasmas, Vol. 12, Issue 11
    • DOI: 10.1063/1.2131848

    BEAMS3D Neutral Beam Injection Model
    journal, July 2014


    Electron temperature gradient driven turbulence
    journal, May 2000

    • Jenko, F.; Dorland, W.; Kotschenreuther, M.
    • Physics of Plasmas, Vol. 7, Issue 5
    • DOI: 10.1063/1.874014

    Pressure-induced breaking of equilibrium flux surfaces in the W7AS stellarator
    journal, June 2007


    Low edge safety factor operation and passive disruption avoidance in current carrying plasmas by the addition of stellarator rotational transform
    journal, November 2015

    • Pandya, M. D.; ArchMiller, M. C.; Cianciosa, M. R.
    • Physics of Plasmas, Vol. 22, Issue 11
    • DOI: 10.1063/1.4935396

    Theory and observations of high frequency Alfv n eigenmodes in low aspect ratio plasmas
    journal, March 2003


    Fast particle confinement with optimized coil currents in the W7-X stellarator
    journal, April 2014


    Drift mode calculations in nonaxisymmetric geometry
    journal, December 1999

    • Rewoldt, G.; Ku, L. -P.; Tang, W. M.
    • Physics of Plasmas, Vol. 6, Issue 12
    • DOI: 10.1063/1.873757

    Recent results from the Large Helical Device
    journal, March 2003


    Experimental divertor physics
    journal, June 1997


    Mitigation of Alfvénic activity by 3D magnetic perturbations on NSTX
    journal, July 2016


    Plasma equilibrium in a magnetic field with stochastic regions
    journal, July 2009

    • Krommes, John A.; Reiman, Allan H.
    • Physics of Plasmas, Vol. 16, Issue 7
    • DOI: 10.1063/1.3159607

    Efficient magnetic fields for supporting toroidal plasmas
    journal, March 2016

    • Landreman, Matt; Boozer, Allen H.
    • Physics of Plasmas, Vol. 23, Issue 3
    • DOI: 10.1063/1.4943201

    A review of impurity transport characteristics in the LHD
    journal, January 2016


    Geometry dependence of stellarator turbulence
    journal, November 2009

    • Mynick, H. E.; Xanthopoulos, P.; Boozer, A. H.
    • Physics of Plasmas, Vol. 16, Issue 11
    • DOI: 10.1063/1.3258848

    Magnetic geometry and physics of advanced divertors: The X-divertor and the snowflake
    journal, October 2013

    • Kotschenreuther, Mike; Valanju, Prashant; Covele, Brent
    • Physics of Plasmas, Vol. 20, Issue 10
    • DOI: 10.1063/1.4824735

    Comparing linear ion-temperature-gradient-driven mode stability of the National Compact Stellarator Experiment and a shaped tokamak
    journal, February 2013

    • Baumgaertel, J. A.; Hammett, G. W.; Mikkelsen, D. R.
    • Physics of Plasmas, Vol. 20, Issue 2
    • DOI: 10.1063/1.4791657

    Evaluation of 1/ν neoclassical transport in stellarators
    journal, December 1999

    • Nemov, V. V.; Kasilov, S. V.; Kernbichler, W.
    • Physics of Plasmas, Vol. 6, Issue 12
    • DOI: 10.1063/1.873749

    On impurity handling in high performance stellarator/heliotron plasmas
    journal, April 2009


    Measurements, modelling and electron cyclotron heating modification of Alfvén eigenmode activity in DIII-D
    journal, April 2009


    Generation and damping of neoclassical plasma flows in stellarators
    journal, May 2005


    Characterization of energy confinement in net-current free plasmas using the extended International Stellarator Database
    journal, November 2005


    Control of power, torque, and instability drive using in-shot variable neutral beam energy in tokamaks
    journal, September 2016


    Healing of magnetic islands in stellarators by plasma flow
    journal, October 2011


    Physics issues of compact drift optimized stellarators
    journal, June 2001


    Central flattening of the fast-ion profile in reversed-shear DIII-D discharges
    journal, June 2008


    Quasilinear carbon transport in an impurity hole plasma in LHD
    journal, August 2014

    • Mikkelsen, D. R.; Tanaka, K.; Nunami, M.
    • Physics of Plasmas, Vol. 21, Issue 8
    • DOI: 10.1063/1.4890973

    Experimental study of the poloidal flow effect on magnetic island dynamics in LHD and TJ-II
    journal, July 2011


    Observation of the low to high confinement transition in the large helical device
    journal, February 2005

    • Toi, K.; Ohdachi, S.; Yamamoto, S.
    • Physics of Plasmas, Vol. 12, Issue 2
    • DOI: 10.1063/1.1843122

    On neoclassical impurity transport in stellarator geometry
    journal, June 2013


    Transition from tokamak to stellarator turbulence
    journal, November 2000


    Collisionless alpha -particle confinement in stellarators
    journal, June 1992


    Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER
    journal, August 2013


    On collisional impurity transport in nonaxisymmetric plasmas
    journal, November 2014


    Development of Divertor Concept for Optimized Stellarators
    journal, January 1992

    • Nührenberg, J.; Strumberger, E.
    • Contributions to Plasma Physics, Vol. 32, Issue 3-4
    • DOI: 10.1002/ctpp.2150320306

    Marginal stability diagrams for infinite- n ballooning modes in quasi-symmetric stellarators
    journal, April 2004


    A full tungsten divertor for ITER: Physics issues and design status
    journal, July 2013


    Gyrokinetic global three-dimensional simulations of linear ion-temperature-gradient modes in Wendelstein 7-X
    journal, June 2004

    • Kornilov, V.; Kleiber, R.; Hatzky, R.
    • Physics of Plasmas, Vol. 11, Issue 6
    • DOI: 10.1063/1.1737393

    TEM turbulence optimisation in stellarators
    journal, October 2015


    Sensitivity of detachment extent to magnetic configuration and external parameters
    journal, April 2016


    A geometry interface for gyrokinetic microturbulence investigations in toroidal configurations
    journal, August 2009

    • Xanthopoulos, P.; Cooper, W. A.; Jenko, F.
    • Physics of Plasmas, Vol. 16, Issue 8
    • DOI: 10.1063/1.3187907

    Physics of the density limit in the W7-AS stellarator
    journal, May 2000


    Observation of an impurity hole in a plasma with an ion internal transport barrier in the Large Helical Device
    journal, May 2009

    • Ida, K.; Yoshinuma, M.; Osakabe, M.
    • Physics of Plasmas, Vol. 16, Issue 5
    • DOI: 10.1063/1.3111097

    3D Divertor Transport Study of the Local Island Divertor Configuration in the Large Helical Device
    journal, September 2006

    • Kobayashi, M.; Feng, Y.; Reiter, D.
    • Contributions to Plasma Physics, Vol. 46, Issue 7-9
    • DOI: 10.1002/ctpp.200610039

    Electromagnetic kinetic toroidal eigenmodes for general magnetohydrodynamic equilibria
    journal, January 1982


    Engineering optimization of stellarator coils lead to improvements in device maintenance
    conference, May 2015


    Stability of bootstrap current‐driven magnetic islands in stellarators
    journal, September 1994

    • Hegna, C. C.; Callen, J. D.
    • Physics of Plasmas, Vol. 1, Issue 9
    • DOI: 10.1063/1.870505

    3D toroidal physics: Testing the boundaries of symmetry breakinga)
    journal, May 2015


    Optimization activities on design studies of LHD-type reactor FFHR
    journal, December 2008


    Gyrokinetic Vlasov Code Including Full Three-dimensional Geometry of Experiments
    journal, January 2010

    • Nunami, Masanori; Watanabe, Tomo-Hiko; Sugama, Hideo
    • Plasma and Fusion Research, Vol. 5
    • DOI: 10.1585/pfr.5.016

    Poloidal variation of high- Z impurity density due to hydrogen minority ion cyclotron resonance heating on Alcator C-Mod
    journal, March 2012


    Reducing turbulent transport in toroidal configurations via shaping
    journal, May 2011

    • Mynick, H. E.; Pomphrey, N.; Xanthopoulos, P.
    • Physics of Plasmas, Vol. 18, Issue 5
    • DOI: 10.1063/1.3560591

    Observation of an impurity hole in the Large Helical Device
    journal, May 2009


    Comparison between stellarator and tokamak divertor transport
    journal, January 2011


    Modular coils and plasma configurations for quasi-axisymmetric stellarators
    journal, November 2010


    Stellarators with the magnetic symmetry of a tokamak
    journal, July 1996