Simulation of edge localized mode heat pulse using drift-kinetic ions and Boltzmann electrons [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 537.6 Electrodynamics (Electric currents) and thermoelectricity
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2019
• Mô tả vật lý: Size: p. 330-334 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 267973
• Chủ đề: 1. 70 plasma physics and fusion technology; 2. 72 physics of elementary particles and fields; 3. Kinetic theory; 4. Magnetic fusion energy; 5. Vlasov equation

Tóm tắt

This article reports on 1D+2V heat pulse propagation studies using the COGENT guiding center kinetic code. The model uses magnetized kinetic ions and a simple Boltzmann electron model. Results agree with previous kinetic and fluid modeling benchmark studies that correspond to the parameters of edge localized modes (ELMs) observed on the JET tokamak. The plasma parameters for the edge pedestal and ensuing ELM dynamics are in the low collisionality regime. Hence, the dominant balance between the assumed Maxwellian ELM source and collisionless parallel advection causes the ion PDF to develop a significantly anisotropic velocity distribution. Adding nonlinear Coulomb ion-ion collisions to the model acts to smooth the sharp features of the ion distribution function, but the anisotropy remains robust due to the low collisionality.