A comparison between a refined two-point model for the limited tokamak SOL and self-consistent plasma turbulence simulations. (6th March 2017)

• Record Type: Journal Article
• Authors: Wersal, C; Ricci, P; Loizu, J
• Is Part Of: Plasma physics and controlled fusion. Volume 59:Number 4(2017:Apr.)
• Publication Date: 2017-03-06
• Subjects: plasma physics -- scrape-off layer -- turbulence -- two-point model; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/1361-6587/aa5cf9
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: A refined two-point model is derived from the drift-reduced Braginskii equations for the limited tokamak scrape-off layer (SOL) by balancing the parallel and perpendicular transport of plasma and heat and taking into account the plasma–neutral interaction. The model estimates the electron temperature drop along a field line, from a region far from the limiter to the limiter plates. Self-consistent first-principles turbulence simulations of the SOL plasma including its interaction with neutral atoms are performed with the GBS code and compared to the refined two-point model. The refined two-point model is shown to be in very good agreement with the turbulence simulation results.