One-dimensional modeling of transport in small stellarators

Author

Mertens, K.J.S. ; Hitchon, W.N.G. ; Anderson, D.T. ; Shohet, J.L.

Author_Institution

Torsatron/Stellarator Lab., Wisconsin Univ., Madison, WI, USA

Volume

16

Issue

2

fYear

1988

fDate

4/1/1988 12:00:00 AM

Firstpage

296

Lastpage

304

Abstract

An existing stellarator reactor transport code was modified to model small stellarator experiments. Changes were made in the treatment of neutrals, the atomic physics process, and the transport models. The authors investigated the extent to which the hollow density profiles experimentally detected during electron cyclotron resonance heating (ECRH) experiments in the interchangeable module stellarator (IMS), a small modular stellarator, can be modeled. In this they were guided by the experimental observation of large variations in potential around the magnetic surfaces, which can give rise to radially directed E×B convective flow. A diffusion model based on small-scale convective cell structures cannot simulate the experimental profiles. Including a purely convective term in the particle balance equation allows for a much-more-accurate modeling of the profiles. A comparison between numerical and experimental results is presented

Keywords

plasma simulation; plasma transport processes; stellarators; atomic physics; convective term; electron cyclotron resonance heating; hollow density profiles; interchangeable module stellarator; modular stellarator; neutrals; particle balance equation; radially directed E×B convective flow; reactor transport code; small stellarators; transport models; Cyclotrons; Inductors; Magnetic resonance; Physics; Plasma applications; Plasma density; Plasma devices; Plasma simulation; Plasma temperature; Plasma transport processes;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.3828

Filename

3828