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Title: Current-Drive Efficiency in a Degenerate Plasma

Abstract

a degenerate plasma, the rates of electron processes are much smaller than the classical model would predict, affecting the efficiencies of current generation by external non-inductive means, such as by electromagnetic radiation or intense ion beams. For electron-based mechanisms, the current-drive efficiency is higher than the classical prediction by more than a factor of 6 in a degenerate hydrogen plasma, mainly because the electron-electron collisions do not quickly slow down fast electrons. Moreover, electrons much faster than thermal speeds are more readily excited without exciting thermal electrons. In ion-based mechanisms of current drive, the efficiency is likewise enhanced due to the degeneracy effects, since the electron stopping power on slow ion beams is significantly reduced.

Authors:
Publication Date:
Research Org.:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
934519
Report Number(s):
PPPL-4130
Journal ID: PRLTAO; R&D Project: DOE Research Grant No. DE-FG52-04NA00139; TRN: US0803893
DOE Contract Number:  
AC02-76CH0-3073, DE-FG02-05ER54838
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 95; Journal Issue: 22
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; EFFICIENCY; ELECTROMAGNETIC RADIATION; ELECTRON-ELECTRON COLLISIONS; ELECTRONS; FORECASTING; HYDROGEN; ION BEAMS; PLASMA; STOPPING POWER; hydrogen; plasma collision processes; bremsstrahlung; Compton effect; plasma transport processes

Citation Formats

S. Son and N.J. Fisch. Current-Drive Efficiency in a Degenerate Plasma. United States: N. p., 2005. Web. doi:10.1103/PhysRevLett.95.225002.
S. Son and N.J. Fisch. Current-Drive Efficiency in a Degenerate Plasma. United States. doi:10.1103/PhysRevLett.95.225002.
S. Son and N.J. Fisch. Tue . "Current-Drive Efficiency in a Degenerate Plasma". United States. doi:10.1103/PhysRevLett.95.225002. https://www.osti.gov/servlets/purl/934519.
@article{osti_934519,
title = {Current-Drive Efficiency in a Degenerate Plasma},
author = {S. Son and N.J. Fisch},
abstractNote = {a degenerate plasma, the rates of electron processes are much smaller than the classical model would predict, affecting the efficiencies of current generation by external non-inductive means, such as by electromagnetic radiation or intense ion beams. For electron-based mechanisms, the current-drive efficiency is higher than the classical prediction by more than a factor of 6 in a degenerate hydrogen plasma, mainly because the electron-electron collisions do not quickly slow down fast electrons. Moreover, electrons much faster than thermal speeds are more readily excited without exciting thermal electrons. In ion-based mechanisms of current drive, the efficiency is likewise enhanced due to the degeneracy effects, since the electron stopping power on slow ion beams is significantly reduced.},
doi = {10.1103/PhysRevLett.95.225002},
journal = {Physical Review Letters},
number = 22,
volume = 95,
place = {United States},
year = {Tue Nov 01 00:00:00 EST 2005},
month = {Tue Nov 01 00:00:00 EST 2005}
}