NSTX tangential divertor camera
2004; American Institute of Physics; Volume: 75; Issue: 10 Linguagem: Inglês
10.1063/1.1789609
ISSN1527-2400
AutoresA. L. Roquemore, T. M. Biewer, D. Johnson, S. J. Zweben, N. Nishino, V. Soukhanovskii,
Tópico(s)Magnetic confinement fusion research
ResumoStrong 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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