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Radial electric fields and transport barriers

Kristel Crombé (UGent) and Guido Van Oost (UGent)
(2012) FUSION SCIENCE AND TECHNOLOGY. 61(2). p.169-179
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Abstract
The importance of radial (i.e. perpendicular to the magnetic surface) electric fields was already recognised early in the research on controlled thermonuclear fusion. An initial description of electric field effects in toroidal confinement was given by Budker. Such a configuration with combined magnetic and electric confinement (“magnetoelectric confinement”, where the electric field provides a toroidal equilibrium configuration without rotational transform) was studied by Stix, who suggested that a reactor-grade plasma under magnetoelectric confinement (electric fields of order 1 MV/cm) may reach a quasi-steady-state with ambipolar loss of electrons and some suprathermal ions (e.g. 3.5 MeV -particles). Experiments such as on the Electric Field Bumpy Torus EFBT provided quite favourable scaling for particle confinement. The possible importance of radial electric fields for transport was in the past repeatedly established. Since the early days the plasma potential has been measured in tokamaks such as ST, TM-4 and ISX-B, but because no significant effects of the radial electric field Er on plasma transport were observed under the machine conditions at that time, no further research was conducted in tokamaks.
Keywords
plasma, electric fields, transport barrier, POLOIDAL FLOW GENERATION, L-H TRANSITION, IMPROVED CONFINEMENT, PRESSURE PROFILES, TOKAMAK PLASMAS, TEXTOR TOKAMAK, MAGNETIC SHEAR, VELOCITY SHEAR, TURBULENCE, MODE

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MLA
Crombé, Kristel, and Guido Van Oost. “Radial Electric Fields and Transport Barriers.” FUSION SCIENCE AND TECHNOLOGY 61.2 (2012): 169–179. Print.
APA
Crombé, Kristel, & Van Oost, G. (2012). Radial electric fields and transport barriers. FUSION SCIENCE AND TECHNOLOGY, 61(2), 169–179. Presented at the 10th Carolus Magnus Summer School on Plasma and Fusion Energy Physics.
Chicago author-date
Crombé, Kristel, and Guido Van Oost. 2012. “Radial Electric Fields and Transport Barriers.” Fusion Science and Technology 61 (2): 169–179.
Chicago author-date (all authors)
Crombé, Kristel, and Guido Van Oost. 2012. “Radial Electric Fields and Transport Barriers.” Fusion Science and Technology 61 (2): 169–179.
Vancouver
1.
Crombé K, Van Oost G. Radial electric fields and transport barriers. FUSION SCIENCE AND TECHNOLOGY. 2012;61(2):169–79.
IEEE
[1]
K. Crombé and G. Van Oost, “Radial electric fields and transport barriers,” FUSION SCIENCE AND TECHNOLOGY, vol. 61, no. 2, pp. 169–179, 2012.
@article{2066523,
  abstract     = {The importance of radial (i.e. perpendicular to the magnetic surface) electric fields was already recognised early in the research on controlled thermonuclear fusion. An initial description of electric field effects in toroidal confinement was given by Budker. Such a configuration with combined magnetic and electric confinement (“magnetoelectric confinement”, where the electric field provides a toroidal equilibrium configuration without rotational transform) was studied by Stix, who suggested that a reactor-grade plasma under magnetoelectric confinement (electric fields of order 1 MV/cm) may reach a quasi-steady-state with ambipolar loss of electrons and some suprathermal ions (e.g. 3.5 MeV -particles). Experiments such as on the Electric Field Bumpy Torus EFBT provided quite favourable scaling for particle confinement. The possible importance of radial electric fields for transport was in the past repeatedly established. Since the early days the plasma potential has been measured in tokamaks such as ST, TM-4 and ISX-B, but because no significant effects of the radial electric field Er on plasma transport were observed under the machine conditions at that time, no further research was conducted in tokamaks.},
  author       = {Crombé, Kristel and Van Oost, Guido},
  issn         = {1536-1055},
  journal      = {FUSION SCIENCE AND TECHNOLOGY},
  keywords     = {plasma,electric fields,transport barrier,POLOIDAL FLOW GENERATION,L-H TRANSITION,IMPROVED CONFINEMENT,PRESSURE PROFILES,TOKAMAK PLASMAS,TEXTOR TOKAMAK,MAGNETIC SHEAR,VELOCITY SHEAR,TURBULENCE,MODE},
  language     = {eng},
  location     = {Weert, The Netherlands},
  number       = {2},
  pages        = {169--179},
  title        = {Radial electric fields and transport barriers},
  volume       = {61},
  year         = {2012},
}

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