Work

Vertical poloidal asymmetries of low-Z element radiation in the PDX tokamak

Year: 1983

Type: article

Abstract: Vertical poloidal asymmetries of hydrogen isotopes and low-Z impurity radiation in the PDX tokamak may be caused by poloidally asymmetric sources of these elements at gas inlet valves, limiters or vacuum vessel walls, asymmetric magnetic-field geometry in the region beyond the plasma boundary, or by ion curvature drifts. Low ionization states of carbon (C II to C IV) are more easily affected by edge conditions than is C V. Vertical poloidal asymmetries of C V are correlated with the direction of the toroidal field. The magnitude of the asymmetry agrees with the predictions of a quasi-fluid neoclassical model. Experimental data and numerical simulations are presented to investigate different models of impurity poloidal asymmetries.

Source: Nuclear Fusion

DOI: 10.1088/0029-5515/23/12/009

Authors: K. Brau, S. Suckewer, S.K. Wong

Institutions: Princeton University, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Princeton Plasma Physics Laboratory, CEA Paris-Saclay - Etablissement de Fontenay-aux-roses

Language: English

Topic: Magnetic confinement fusion research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: U.S. Department of Energy, Centre National de la Recherche Scientifique

Awards: G2925462713, G4550679643, G969889393