Electromagnetic effects on dynamics of high-beta filamentary structures
- Univ. of California San Diego, La Jolla, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Naval Research Lab. (NRL), Washington, DC (United States)
The impacts of the electromagnetic effects on blob dynamics are considered. Electromagnetic BOUT++ simulations on seeded high-beta blobs demonstrate that inhomogeneity of magnetic curvature or plasma pressure along the filament leads to bending of the blob filaments and the magnetic field lines due to increased propagation time of plasma current (Alfvén time). The bending motion can enhance heat exchange between the plasma facing materials and the inner SOL region. The effects of sheath boundary conditions on the part of the blob away from the boundary are also diminished by the increased Alfvén time. Using linear analysis and the BOUT++ simulation, it is found that electromagnetic effects in high temperature and high density plasmas reduce the growth rate of resistive drift wave turbulence when resistivity drops below some certain value. Lastly, in the course of blobs motion in the SOL its temperature is reduced, which leads to enhancement of resistive effects, so the blob can switch from electromagnetic to electrostatic regime, where resistive drift wave turbulence become important.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); Kwanjeong Educational Foundation
- Grant/Contract Number:
- AC52-07NA27344; FG02-04ER54739; SC0010413; AC02-05CH11231
- OSTI ID:
- 1305840
- Alternate ID(s):
- OSTI ID: 1228483
- Report Number(s):
- LLNL-JRNL-698417; PHPAEN
- Journal Information:
- Physics of Plasmas, Vol. 22, Issue 1; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Intermittent convective transport carried by propagating electromagnetic filamentary structures in nonuniformly magnetized plasma
Three dimensional simulations of plasma filaments in the scrape off layer: A comparison with models of reduced dimensionality