Abstract
Confinement of runaway electrons has been observed for the first time in a reversed field pinch during improved-confinement plasmas in the Madison Symmetric Torus. Energy-resolved hard-x-ray flux measurements have been used to determine the velocity dependence of the electron diffusion coefficient, utilizing computational solutions of the Fokker-Planck transport equation. With improved-confinement, the fast electron diffusivity drops by 2 orders of magnitude and is independent of velocity. This suggests a change in the transport mechanism away from stochastic magnetic field diffusion.
| Original language | English |
|---|---|
| Journal | Physical Review Letters |
| Volume | 91 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jul 24 2003 |
| Externally published | Yes |
Funding
This work was supported by the U.S. Department of Energy. The authors wish to recognize the many contributions of the UW-Madison MST group, including collaborators from UCLA; David Brower and Weixing Ding and CEA Cadarache; Yves Peysson and Léna Delpech.