PPPL-4181 is available in <a href="PPPL-4181.pdf">pdf</a> format (1.4 MB).

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<b>Detection of Short-scale Turbulence in the Next Generation of Tokamak Burning Plasma Experiments</b>
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<b>Author:</b> E. Mazzucato
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<b>Date of PPPL Report:</b> June 2006
<br>Revised: November 2006
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<b>Published in:</b> Plasma Physics and Controlled Fusion <b>48</b>:12 (December 2006) 1749&ndash;1763
<br>doi:10.1088/0741-3335/48/12/005
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In this paper, we discuss the use of coherent scattering of CO<sub>2</sub> lasers for high resolution measurements of short-scale turbulent fluctuations in the next generation of tokamak burning plasma experiments. The unique feature of the proposed scheme is the oblique propagation of the probing beam with respect to the magnetic field, with the toroidal curvature of field lines playing a major role in improving the spatial resolution of measured signals. In addition, small scattering angles and negligible wave refraction effects minimize the size of needed ports &mdash; a matter of vital importance for a plasma diagnostic that must operate in the hostile environment of a burning plasma.





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