Core electrostatic fluctuations and particle transport in a reversed-field pinch.
Potential and electron-density fluctuation profiles, phi(r) and ñ(e)(r)/n(e), are measured for the first time in the core of a reversed-field pinch using a heavy ion beam probe. It is found that the fluctuations are broadband and correlated with the core resonant m/n=1/6 tearing mode. The electrostatic-fluctuation-induced particle transport in the core of standard RFP plasmas, estimated from measured <ñ(e)phi>, is small compared to the total particle flux. Measurements of fluctuations and estimates of fluctuation induced particle transport in improved confinement RFP discharges are also presented.
Lei
J
J
ECSE Department, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
Schoch
P M
PM
Demers
D R
DR
Shah
U
U
Connor
K A
KA
Anderson
J K
JK
Crowley
T P
TP