Abstract
Reducing plasma heat flux on the material limiter and stabilizing fluctuations at the plasma boundary by the use of an RF ponderomotive potential barrier on the limiter (RF limiter) have been demonstrated in Compact Helical System (CHS) for ECH heated plasma. The RF current on a graphite limiter surface along magnetic field lines produces a ponderomotive potential barrier, which is large at the limiter edges. The high heat load on the limiter edges, which is measured using a infrared TV camera, has been shown to be reduced by an RF power of 1.4 kW at the frequency 10 MHz ({omega}{sub ci}<{omega}<<{omega}{sub ce}). Another remarkable effect of the ponderomotive potential barrier on the limiter that has been observed is the suppression of density fluctuations (<100 kHz) at the plasma boundary. (author).
Citation Formats
Shoji, T, Sagara, A, and Noda, N.
Edge plasma control by RF electric field in Compact Helical System (CHS).
Japan: N. p.,
1992.
Web.
Shoji, T, Sagara, A, & Noda, N.
Edge plasma control by RF electric field in Compact Helical System (CHS).
Japan.
Shoji, T, Sagara, A, and Noda, N.
1992.
"Edge plasma control by RF electric field in Compact Helical System (CHS)."
Japan.
@misc{etde_10111186,
title = {Edge plasma control by RF electric field in Compact Helical System (CHS)}
author = {Shoji, T, Sagara, A, and Noda, N}
abstractNote = {Reducing plasma heat flux on the material limiter and stabilizing fluctuations at the plasma boundary by the use of an RF ponderomotive potential barrier on the limiter (RF limiter) have been demonstrated in Compact Helical System (CHS) for ECH heated plasma. The RF current on a graphite limiter surface along magnetic field lines produces a ponderomotive potential barrier, which is large at the limiter edges. The high heat load on the limiter edges, which is measured using a infrared TV camera, has been shown to be reduced by an RF power of 1.4 kW at the frequency 10 MHz ({omega}{sub ci}<{omega}<<{omega}{sub ce}). Another remarkable effect of the ponderomotive potential barrier on the limiter that has been observed is the suppression of density fluctuations (<100 kHz) at the plasma boundary. (author).}
place = {Japan}
year = {1992}
month = {May}
}
title = {Edge plasma control by RF electric field in Compact Helical System (CHS)}
author = {Shoji, T, Sagara, A, and Noda, N}
abstractNote = {Reducing plasma heat flux on the material limiter and stabilizing fluctuations at the plasma boundary by the use of an RF ponderomotive potential barrier on the limiter (RF limiter) have been demonstrated in Compact Helical System (CHS) for ECH heated plasma. The RF current on a graphite limiter surface along magnetic field lines produces a ponderomotive potential barrier, which is large at the limiter edges. The high heat load on the limiter edges, which is measured using a infrared TV camera, has been shown to be reduced by an RF power of 1.4 kW at the frequency 10 MHz ({omega}{sub ci}<{omega}<<{omega}{sub ce}). Another remarkable effect of the ponderomotive potential barrier on the limiter that has been observed is the suppression of density fluctuations (<100 kHz) at the plasma boundary. (author).}
place = {Japan}
year = {1992}
month = {May}
}