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

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 non-axisymmetric magnetic fields results in a decrease in confinement time and density pumpout. 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:
; ; ; ; ; ; ; ; ;
Publication Date:
DOE Contract Number:  
FC02-04ER54698; AC02-09CH11466
Research Org.:
General Atomics, San Diego, CA (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1880535
DOI:
https://doi.org/10.7910/DVN/NEU5GT

Citation Formats

Hawryluk, R. J., Eidietis, N. W., Grierson, B. A., Hyatt, A. W., Kolemen, E., Logan, N. C., Nazikian, R., Paz-Soldan, C., Solomon, W. M., and Wolfe, S. Control of plasma stored energy for burn control using DIII-D in-vessel coils. United States: N. p., 2018. Web. doi:10.7910/DVN/NEU5GT.
Hawryluk, R. J., Eidietis, N. W., Grierson, B. A., Hyatt, A. W., Kolemen, E., Logan, N. C., Nazikian, R., Paz-Soldan, C., Solomon, W. M., & Wolfe, S. Control of plasma stored energy for burn control using DIII-D in-vessel coils. United States. doi:https://doi.org/10.7910/DVN/NEU5GT
Hawryluk, R. J., Eidietis, N. W., Grierson, B. A., Hyatt, A. W., Kolemen, E., Logan, N. C., Nazikian, R., Paz-Soldan, C., Solomon, W. M., and Wolfe, S. 2018. "Control of plasma stored energy for burn control using DIII-D in-vessel coils". United States. doi:https://doi.org/10.7910/DVN/NEU5GT. https://www.osti.gov/servlets/purl/1880535. Pub date:Wed Dec 19 00:00:00 EST 2018
@article{osti_1880535,
title = {Control of plasma stored energy for burn control using DIII-D in-vessel coils},
author = {Hawryluk, R. J. and Eidietis, N. W. and Grierson, B. A. and Hyatt, A. W. and Kolemen, E. and Logan, N. C. and Nazikian, R. and Paz-Soldan, C. and Solomon, W. M. and Wolfe, S.},
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 non-axisymmetric magnetic fields results in a decrease in confinement time and density pumpout. 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 = {10.7910/DVN/NEU5GT},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {12}
}

Works referencing / citing this record:

Control of plasma stored energy for burn control using DIII-D in-vessel coils
journal, April 2015