Initial Operation of the NSTX Fast Tangential Soft X-Ray Camera

Stratton, B.C. ; Feder, R. ; Goeler, S. von ; Renda, G.F. ; Lowrance, J.L. ; Mastrocola, V.J.

Princeton University. Plasma Physics Laboratory.

关键词: Cameras;    Plasma Diagnostics;    70 Plasma Physics And Fusion Technology;    Apertures;    Diagnostics;   

DOI  :  10.2172/827939
RP-ID  :  PPPL-3952
RP-ID  :  AC02-76CH03073
RP-ID  :  827939

美国|英语

来源: UNT Digital Library

【 摘 要 】

Fast, two-dimensional, soft x-ray imaging is a powerful technique for the study of MHD instabilities in tokamak plasmas. We have constructed an ultra-fast frame rate soft x-ray camera for the National Spherical Torus Experiment. It is based on a recently developed 64 x 64 pixel CCD camera capable of capturing 300 frames at up to 500,000 frames per second. A pinhole aperture images the plasma soft x-ray emission (0.2-10 keV) onto a P47 scintillator deposited on a fiber-optic faceplate; the scintillator visible light output is detected and amplified by a demagnifying image intensifier and lens-coupled to the CCD chip. A selection of beryllium foils provides discrimination of low-energy emission. The system is installed on NSTX with a wide-angle tangential view of the plasma. Initial plasma data and an assessment of the system performance are presented.