Plasma turbulence imaging using high-power laser Thomson scattering

Zweben, S.J. ; Caird, J. ; Davis, W. ; Johnson, D.W. ; LeBlanc, B.P.

Princeton University. Plasma Physics Laboratory.

关键词: Nstx Device;    70 Plasma Physics And Fusion Technology;    Laser Radiation;    Plasma Density;    Turbulence;   

DOI  :  10.2172/757323
RP-ID  :  PPPL-3461
RP-ID  :  AC02-76CH03073
RP-ID  :  757323

美国|英语

来源: UNT Digital Library

【 摘 要 】

The 2-D structure of plasma density turbulence in a magnetically confined plasma can potentially be measured using a Thomson scattering system made from components of the Nova laser of LLNL. For a plasma such as NSTX at PPPL, the laser would form an {approximately}10 cm wide plane sheet beam passing vertically through the chamber across the magnetic field. The scattered light would be imaged by a CCD camera viewing along the direction of the magnetic field. The laser energy required to make 2-D images of density turbulence is in the range 1--3 kJ, which can potentially be obtained from a set of frequency-doubled Nd:Glass amplifiers with diameters in the range of 208--315 mm. A laser pulse width of 100 nsec would be short enough to capture the highest spatial frequency components of the expected density fluctuations.