Access to a new plasma edge state with high density and pressures using the quiescent mode
Abstract
A path to a new high performance regime has been discovered in tokamaks that could improve the attractiveness of a fusion reactor. Experiments on DIII-D using a quiescent H-mode edge have navigated a valley of improved edge peeling-ballooning stability that opens up with strong plasma shaping at high density, leading to a doubling of the edge pressure over the standard H mode with edge localized modes at these parameters. The thermal energy confinement time increases as a result of both the increased pedestal height and improvements in the core transport and reduced low-k turbulence. As a result, calculations of the pedestal height and width as a function of density using constraints imposed by peeling-ballooning and kinetic-ballooning theory are in quantitative agreement with the measurements.
- Authors:
-
- Princeton Univ., Princeton, NJ (United States)
- General Atomics, San Diego, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- ITER Organization, Saint Paul Lez Durance Cedex (France)
- Univ. of Wisconsin, Madison, WI (United States)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1367150
- Alternate Identifier(s):
- OSTI ID: 1180685
- Grant/Contract Number:
- FC02-04ER54698; AC02-09CH11466; AC52-07NA27344; FG02-89ER53296; FG02-08ER54999; FG02-95ER54309
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 113; Journal Issue: 13; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Solomon, Wayne M., Snyder, Philip B., Burrell, Keith H., Fenstermacher, Max E., Garofalo, Andrea M., Grierson, Brian A., Loarte, Alberto, McKee, George R., Nazikian, Raffi, and Osborne, Thomas H. Access to a new plasma edge state with high density and pressures using the quiescent H mode. United States: N. p., 2014.
Web. doi:10.1103/PhysRevLett.113.135001.
Solomon, Wayne M., Snyder, Philip B., Burrell, Keith H., Fenstermacher, Max E., Garofalo, Andrea M., Grierson, Brian A., Loarte, Alberto, McKee, George R., Nazikian, Raffi, & Osborne, Thomas H. Access to a new plasma edge state with high density and pressures using the quiescent H mode. United States. https://doi.org/10.1103/PhysRevLett.113.135001
Solomon, Wayne M., Snyder, Philip B., Burrell, Keith H., Fenstermacher, Max E., Garofalo, Andrea M., Grierson, Brian A., Loarte, Alberto, McKee, George R., Nazikian, Raffi, and Osborne, Thomas H. Wed .
"Access to a new plasma edge state with high density and pressures using the quiescent H mode". United States. https://doi.org/10.1103/PhysRevLett.113.135001. https://www.osti.gov/servlets/purl/1367150.
@article{osti_1367150,
title = {Access to a new plasma edge state with high density and pressures using the quiescent H mode},
author = {Solomon, Wayne M. and Snyder, Philip B. and Burrell, Keith H. and Fenstermacher, Max E. and Garofalo, Andrea M. and Grierson, Brian A. and Loarte, Alberto and McKee, George R. and Nazikian, Raffi and Osborne, Thomas H.},
abstractNote = {A path to a new high performance regime has been discovered in tokamaks that could improve the attractiveness of a fusion reactor. Experiments on DIII-D using a quiescent H-mode edge have navigated a valley of improved edge peeling-ballooning stability that opens up with strong plasma shaping at high density, leading to a doubling of the edge pressure over the standard H mode with edge localized modes at these parameters. The thermal energy confinement time increases as a result of both the increased pedestal height and improvements in the core transport and reduced low-k turbulence. As a result, calculations of the pedestal height and width as a function of density using constraints imposed by peeling-ballooning and kinetic-ballooning theory are in quantitative agreement with the measurements.},
doi = {10.1103/PhysRevLett.113.135001},
journal = {Physical Review Letters},
number = 13,
volume = 113,
place = {United States},
year = {Wed Sep 24 00:00:00 EDT 2014},
month = {Wed Sep 24 00:00:00 EDT 2014}
}
Web of Science
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