Artigo Acesso aberto Revisado por pares

NSTX tangential divertor camera

2004; American Institute of Physics; Volume: 75; Issue: 10 Linguagem: Inglês

10.1063/1.1789609

ISSN

1527-2400

Autores

A. L. Roquemore, T. M. Biewer, D. Johnson, S. J. Zweben, N. Nishino, V. Soukhanovskii,

Tópico(s)

Magnetic confinement fusion research

Resumo

Strong magnetic field shear around the divertor x-point is numerically predicted to lead to strong spatial asymmetries in turbulence driven particle fluxes. To visualize the turbulence and associated impurity line emission near the lower x-point region, a new tangential observation port has been recently installed on NSTX. A reentrant sapphire window with a moveable in-vessel mirror images the divertor region from the center stack out to R∼80 cm and views the x-point for most plasma configurations. A coherent fiber optic bundle transmits the image through a remotely selected filter to a fast camera, for example, a 40 500 frames/s photron complementary metal-oxide-semiconductor camera. A gas puffer located in the lower inboard divertor will localize the turbulence in the region near the x-point. Edge fluid and turbulent codes UEDGE and BOUT will be used to interpret impurity and deuterium emission fluctuation measurements in the divertor.

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