Control of plasma stored energy for burn control using DIII-D in-vessel coils

Hawryluk, Richard J.; Eidietis, Nicholas W.; Grierson, Brian A.; Hyatt, Alan W.; Kolemen, Egemen; Logan, Nikolas C.; Nazikian, Raffi M.; Paz-Soldan, Carlos A.; Solomon, Wayne M.; Wolfe, Stephen M.

doi:10.1088/0029-5515/55/5/053001

Title: Control of plasma stored energy for burn control using DIII-D in-vessel coils

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Abstract

A new approach has been experimentally demonstrated to control the stored energy by applying a non-axisymmetric magnetic field using the DIII-D in-vessel coils to modify the energy confinement time. In future burning plasma experiments as well as magnetic fusion energy power plants, various concepts have been proposed to control the fusion power. The fusion power in a power plant operating at high gain can be related to the plasma stored energy and hence, is a strong function of the energy confinement time. Thus, an actuator that modifies the confinement time can be used to adjust the fusion power. In relatively low collisionality DIII-D discharges, the application of nonaxisymmetric magnetic fields results in a decrease in confinement time and density pumpout. Furthermore, gas puffing was used to compensate the density pumpout in the pedestal while control of the stored energy was demonstrated by the application of non-axisymmetric fields.

Authors:

Hawryluk, Richard J. ^[1]; Eidietis, Nicholas W. ^[2]; Grierson, Brian A. ^[1]; Hyatt, Alan W. ^[2]; Kolemen, Egemen ^[1]; Logan, Nikolas C. ^[1]; Nazikian, Raffi M. ^[1]; Paz-Soldan, Carlos A. ^[2]; Solomon, Wayne M. ^[1]; Wolfe, Stephen M. ^[3]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
General Atomics, San Diego, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Publication Date:: Thu Apr 09 00:00:00 EDT 2015

Research Org.:: General Atomics, San Diego, CA (United States)

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE)

OSTI Identifier:: 1354749

Grant/Contract Number:: FC02-04ER54698

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Fusion

Additional Journal Information:: Journal Volume: 55; 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; fusion reactors; magnetic confinement; equilibrium; tokamaks

Citation Formats


                    Hawryluk, Richard J., Eidietis, Nicholas W., Grierson, Brian A., Hyatt, Alan W., Kolemen, Egemen, Logan, Nikolas C., Nazikian, Raffi M., Paz-Soldan, Carlos A., Solomon, Wayne M., and Wolfe, Stephen M. Control of plasma stored energy for burn control using DIII-D in-vessel coils.  United States: N. p., 2015. 
Web.  doi:10.1088/0029-5515/55/5/053001.

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                    Hawryluk, Richard J., Eidietis, Nicholas W., Grierson, Brian A., Hyatt, Alan W., Kolemen, Egemen, Logan, Nikolas C., Nazikian, Raffi M., Paz-Soldan, Carlos A., Solomon, Wayne M., & Wolfe, Stephen M. Control of plasma stored energy for burn control using DIII-D in-vessel coils.  United States.  https://doi.org/10.1088/0029-5515/55/5/053001

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                    Hawryluk, Richard J., Eidietis, Nicholas W., Grierson, Brian A., Hyatt, Alan W., Kolemen, Egemen, Logan, Nikolas C., Nazikian, Raffi M., Paz-Soldan, Carlos A., Solomon, Wayne M., and Wolfe, Stephen M. Thu .  
"Control of plasma stored energy for burn control using DIII-D in-vessel coils".  United States.  https://doi.org/10.1088/0029-5515/55/5/053001.  https://www.osti.gov/servlets/purl/1354749.

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@article{osti_1354749,

  title        = {Control of plasma stored energy for burn control using DIII-D in-vessel coils},

  author       = {Hawryluk, Richard J. and Eidietis, Nicholas W. and Grierson, Brian A. and Hyatt, Alan W. and Kolemen, Egemen and Logan, Nikolas C. and Nazikian, Raffi M. and Paz-Soldan, Carlos A. and Solomon, Wayne M. and Wolfe, Stephen M.},

  abstractNote = {A new approach has been experimentally demonstrated to control the stored energy by applying a non-axisymmetric magnetic field using the DIII-D in-vessel coils to modify the energy confinement time. In future burning plasma experiments as well as magnetic fusion energy power plants, various concepts have been proposed to control the fusion power. The fusion power in a power plant operating at high gain can be related to the plasma stored energy and hence, is a strong function of the energy confinement time. Thus, an actuator that modifies the confinement time can be used to adjust the fusion power. In relatively low collisionality DIII-D discharges, the application of nonaxisymmetric magnetic fields results in a decrease in confinement time and density pumpout. Furthermore, gas puffing was used to compensate the density pumpout in the pedestal while control of the stored energy was demonstrated by the application of non-axisymmetric fields.},

  doi          = {10.1088/0029-5515/55/5/053001},

  journal      = {Nuclear Fusion},

  number       = 5,

  volume       = 55,

  place        = {United States},

  year         = {Thu Apr 09 00:00:00 EDT 2015},

  month        = {Thu Apr 09 00:00:00 EDT 2015}

}

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