High flux expansion divertor studies in NSTX
Plasma Physics
2009-12-23 v1
Abstract
High flux expansion divertor studies have been carried out in the National Spherical Torus Experiment using steady-state X-point height variations from 22 to 5-6 cm. Small-ELM H-mode confinement was maintained at all X-point heights. Divertor flux expansions from 6 to 26-28 were obtained, with associated reduction in X-point connection length from 5-6 m to 2 m. Peak divertor heat flux was reduced from 7-8 MW/m to 1-2 MW/m. In low X-point configuration, outer strike point became nearly detached. Among factors affecting deposition of parallel heat flux in the divertor, the flux expansion factor appeared to be dominant
Cite
@article{arxiv.0912.4281,
title = {High flux expansion divertor studies in NSTX},
author = {V. A. Soukhanovskii and R. Maingi and R. E. Bell and D. A. Gates and R. Kaita and H. W. Kugel and B. P. LeBlanc and R. Maqueda and J. E. Menard and D. Mueller and S. F. Paul and R. Raman and A. L. Roquemore},
journal= {arXiv preprint arXiv:0912.4281},
year = {2009}
}