Physics
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..apr.s1058l&link_type=abstract
American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #S1.058
Physics
Scientific paper
Numerical calculations of the transport coefficients in stellarators predict that the radial transport becomes large for ``resonant'' values of the radial electric field. These resonances are understood to occur due to particles that do not experience an effective rotational transform due to the sum of parallel plus E xB motion. However, here it is argued that the resonances are an artifact of the ``monoenergetic and local'' approximation used in the calculations, in which the kinetic energy rather than total energy (kinetic plus electrostatic potential) is taken as a constant of particle motion. Due to the nonzero width of particle orbits, potential energy is not constant when a radial electric field is present, and the resulting variation in v|| prevents particles from staying in resonance. We prove this point by explicitly calculating particle orbits without making the monoenergetic approximation. We also analytically calculate the radial ion heat transport in several idealized stellarator fields to show that when the monoenergetic approximation is not made, no resonance appears.
No associations
LandOfFree
Are the electric field resonances in stellarator transport real? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Are the electric field resonances in stellarator transport real?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Are the electric field resonances in stellarator transport real? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1368435