Plasma density measurements using chirped pulse broad-band Raman amplification
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- Plasma density measurements using chirped pulse broad-band Raman amplification
- Vieux, G.; Ersfeld, B.; Farmer, J.P.; Hur, Min Sup; Issac, R.C.; Jaroszynski, D.A.
- high-speed optical techniques; plasma density; plasma diagnostics; stimulated Raman scattering
- Issue Date
- AMER INST PHYSICS
- APPLIED PHYSICS LETTERS, v.103, no.12, pp.1 - 4
- Stimulated Raman backscattering is used as a non-destructive method to determine the density of plasma media at localized positions in space and time. By colliding two counter-propagating, ultra-short laser pulses with a spectral bandwidth larger than twice the plasma frequency, amplification occurs at the Stokes wavelengths, which results in regions of gain and loss separated by twice the plasma frequency, from which the plasma density can be deduced. By varying the relative delay between the laser pulses, and therefore the position and timing of the interaction, the spatio-temporal distribution of the plasma density can be mapped out.
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