The radial electric field Erat the edge of the RFX plasma changes sign, from negative (inward) to positive, when an m = 0 perturbation is externally applied. Similar behaviour had been previously observed in presence of wall locked (m = 1) modes, whereby the much stronger plasma-wall interaction made data interpretation more complex. The findings are compatible with the presence of an m = 0, n = 1 magnetic island. While in ordinary situations the edge losses of RFX are interpreted as dominated by finite Larmor radius ion effects, inside the island associated with the external perturbation the diffusion of the electrons is enhanced and exceeds the ion loss flux, thus reversing Er. © 2003 Elsevier Science B.V. All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering
Carraro, L., Puiatti, M. E., Sattin, F., Scarin, P., Spolaore, M., Valisa, M., ... Zanca, P. (2003). Plasma-wall interactions and radial electric fields in the reversed field pinch RFX. Journal of Nuclear Materials, 313-316(SUPPL.), 976 - 979. https://doi.org/10.1016/S0022-3115(02)01423-X