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Title: Increased confinement and beta by inductive poloidal current drive in the RFP

Abstract

Progress in understanding magnetic-fluctuation-induced transport in the reversed field pinch (RFP) has led to the idea of current profile control to reduce fluctuations and transport. With the addition of inductive poloidal current drive in the Madison Symmetric Torus (MST), the magnetic fluctuation amplitude is halved, leading to a four- to five-fold increase in the energy confinement time to {tau}{sub E}{approximately}5 ms as a result of both decreased plasma resistance and increased stored thermal energy. The record low fluctuation amplitude coincides with a record high electron temperature of {approximately}600 eV (for MST), and beta {beta} = 2{mu}{sub 0} / B(a){sup 2} increases from 6% to 8% compared with conventional MST RFP plasmas. Other improvements include increased particle confinement and impurity reduction. 19 refs., 4 figs., 1 tab.

Authors:
; ; ;
Publication Date:
Research Org.:
Wisconsin Univ., Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
419957
Report Number(s):
DOE/ER/54345-283
ON: DE97000177; TRN: 97:002198
DOE Contract Number:  
FG02-96ER54345
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Oct 1996
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; PLASMA; CHARGED-PARTICLE TRANSPORT; MAGNETIC CONFINEMENT; CONFINEMENT TIME; ELECTRON TEMPERATURE; BETA RATIO; PLASMA IMPURITIES; TURBULENCE; MAGNETIC FIELDS; REVERSE-FIELD PINCH; ELECTRIC CURRENTS; FLUCTUATIONS; CONTROL

Citation Formats

Sarff, J S, Lanier, N E, Prager, S C, and Stoneking, M R. Increased confinement and beta by inductive poloidal current drive in the RFP. United States: N. p., 1996. Web. doi:10.2172/419957.
Sarff, J S, Lanier, N E, Prager, S C, & Stoneking, M R. Increased confinement and beta by inductive poloidal current drive in the RFP. United States. https://doi.org/10.2172/419957
Sarff, J S, Lanier, N E, Prager, S C, and Stoneking, M R. Tue . "Increased confinement and beta by inductive poloidal current drive in the RFP". United States. https://doi.org/10.2172/419957. https://www.osti.gov/servlets/purl/419957.
@article{osti_419957,
title = {Increased confinement and beta by inductive poloidal current drive in the RFP},
author = {Sarff, J S and Lanier, N E and Prager, S C and Stoneking, M R},
abstractNote = {Progress in understanding magnetic-fluctuation-induced transport in the reversed field pinch (RFP) has led to the idea of current profile control to reduce fluctuations and transport. With the addition of inductive poloidal current drive in the Madison Symmetric Torus (MST), the magnetic fluctuation amplitude is halved, leading to a four- to five-fold increase in the energy confinement time to {tau}{sub E}{approximately}5 ms as a result of both decreased plasma resistance and increased stored thermal energy. The record low fluctuation amplitude coincides with a record high electron temperature of {approximately}600 eV (for MST), and beta {beta} = 2{mu}{sub 0} / B(a){sup 2} increases from 6% to 8% compared with conventional MST RFP plasmas. Other improvements include increased particle confinement and impurity reduction. 19 refs., 4 figs., 1 tab.},
doi = {10.2172/419957},
url = {https://www.osti.gov/biblio/419957}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {10}
}