Abstract
The physics of Radio-Frequency (RF) wave heating in the Ion Cyclotron Range of Frequencies (ICRF) in the core plasmas of fusion devices are relatively well understood while those in the Scrape-Off Layer (SOL) remain still unresolved. This paper is dedicated to study the ICRF interactions with the plasma edge, mainly from the theoretical and numerical point of view, in particular with the 3D edge plasma fluid and neutral transport code EMC3-EIRENE and various wave codes. Here emphasis is given to the improvement of ICRF coupling with local gas puffing and to the ICRF induced density convection in the SOL.
Highlights
Introduction several codes includingEMC3-EIRENE [7], The coupling of Radio-Frequency power in the Ion RAPLICASOL [9] (ICRF fields) and SSWICH [10]Cyclotron Range of Frequencies (ICRF) to the plasma
To understand this Ion Cyclotron Range of Frequencies (ICRF) induced Scrape-Off Layer (SOL) density convection, two numerical methods have been developed: (a) simulations based on experimental data; (b) self-consistent simulations with
Through edge plasma modelling with ICRF coupling, significant progresses have been made on understanding (1) the effects of local gas puffing on edge plasma density and ICRF coupling; (2) the ICRF induced density convection
Summary
Introduction several codes includingEMC3-EIRENE [7] (extended to include prescribed drifts [8] and plasma convection), The coupling of Radio-Frequency power in the Ion RAPLICASOL [9] (ICRF fields) and SSWICH [10]Cyclotron Range of Frequencies (ICRF) to the plasma (rectified sheath potentials). 1 Introduction several codes including EMC3-EIRENE [7] (extended to include prescribed drifts [8] and plasma convection), The coupling of Radio-Frequency power in the Ion RAPLICASOL [9] (ICRF fields) and SSWICH [10] Recent experiments on AUG [1] and JET [2, 3] indicate that by injecting the fueling gas from the main chamber instead of the divertor, the local density in front of the antennas and the ICRF power coupling can be greatly increased.
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