Related Experiment Video
Updated: Aug 13, 2026

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
Published on: December 22, 2018
Validation of neoclassical bootstrap current models in the edge of an H-mode plasma
M R Wade1, M Murakami, P A Politzer
1Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA.
Abstract:
Analysis of the parallel electric field E(parallel) evolution following an L-H transition in the DIII-D tokamak indicates the generation of a large negative pulse near the edge which propagates inward, indicative of the generation of a noninductive edge current. Modeling indicates that the observed E(parallel) evolution is consistent with a narrow current density peak generated in the plasma edge. Very good quantitative agreement is found between the measured E(parallel) evolution and that expected from neoclassical theory predictions of the bootstrap current.
Related Concept Videos
Torque On A Current Loop In A Magnetic Field
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Magnetic Field Of A Current Loop
Electrostatic Boundary Conditions
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
Electrostatic Boundary Conditions in Dielectrics
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
Boundary Conditions for Current Density
Magnetostatic Boundary Conditions

