Modification of the internal electric field by biasing of the divertor plates in the Tokamak de Varennes (TdeV)

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872260· OSTI ID:542602

Lafrance, D; Huang, R; Stansfield, B L; Haddad, E; Lachambre, J ^[1]

---

1. Centre Canadien de Fusion Magnetique, Varennes, Quebec J3X 1S1 (Canada)

The radial electric field inside the separatrix has been deduced from spectroscopic measurements of impurities on TdeV (Tokamak de Varennes), using the reduced radial momentum balance and two neoclassical models [R. D. Hazeltine, Phys. Fluids {bold 17}, 961 (1974) and Y. B. Kim, P. H. Diamond, and R. J. Groebner, Phys. Fluids B {bold 3}, 2050 (1991)]. The results from all three models are in fair agreement. Furthermore, the electric field has been deduced using the same models both with and without biasing the divertor plates relative to the machine wall, showing an inward propagation of the effect of the biasing created in the scrape-off layer (SOL). Undeniably, the electric field has been modified well inside the separatrix (0.6{approx_lt}r/a{approx_lt}0.9), revealing the possibility of modifying the internal electric field by external means. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 542602
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 4; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
ELECTRIC FIELDS
PLASMA DIAGNOSTICS
PLASMA IMPURITIES
PLASMA SCRAPE-OFF LAYER
PLATES
VARENNES TOKAMAK
WAVE PROPAGATION