Analytical theory of Doppler reflectometry in slab plasma model
نویسندگان
چکیده
Doppler reflectometry is considered in slab plasma model in the frameworks of analytical theory. The diagnostics locality is analyzed for both regimes: linear and nonlinear in turbulence amplitude. The toroidal antenna focusing of probing beam to the cutoff is proposed and discussed as a method to increase diagnostics spatial resolution. It is shown that even in the case of nonlinear regime of multiple scattering, the diagnostics can be used for an estimation (with certain accuracy) of plasma poloidal rotation profile.
منابع مشابه
Plasma curvature effects on microwave reflectometry fluctuation measurements
Plasma poloidal curvature can significantly extend microwave reflectometry responses to high k⊥ poloidal fluctuations. Reflectometry responses can be several orders of magnitude larger at high k⊥ than that predicted by analysis based on two dimensional (2-D) slab geometry. As a result, the responses may approach the 1-D geometrical optics limit. This super resolution leads to a major modificati...
متن کامل1 EX / P 5 - 24 Observation of a Natural Particle Transport Barrier in HL - 2 A Tokamak
In this paper we report the observation of a natural generated internal particle transport barrier ( pITB ) in purely Ohmically heated plasmas in the HL-2A tokamak. The pITB have been observed when the line average electron density exceeds a threshold, which is nc=2.2×10m. The phenomenon is perfectly reproducible and identified by profile analysis, perturbative transport studies with Supersonic...
متن کاملX mode Doppler reflectometry k-spectral measurements in ASDEX Upgrade: experiments and simulations
The perpendicular density fluctuation spectrum in the tokamak ASDEX Upgrade was measured with Doppler reflectometry. In this paper, extensive plasma turbulence and microwave propagation simulations with the GENE gyro-kinetic code and the IPF-FD3D full-wave code were undertaken to explain the observed spectral shape. It was shown that in this case the X-mode polarisation suffers both from a larg...
متن کاملAnalysis of Rolling Process for Clad Sheet Using the Modified Slab Method
In this paper, an analytical model based on Modified Slab Method is presented for rolling of clad sheet or double-layers in which the two layers are bounded prior to rolling. This model considers the general case of asymmetrical rolling due to unequal 
surface speed, different contact friction, roll diameters, flow stress, and thickness ratios of the two layers. Using this model, rolling par...
متن کاملAnalysis of Rolling Process for Clad Sheet Using the Modified Slab Method
In this paper, an analytical model based on Modified Slab Method is presented for rolling of clad sheet or double-layers in which the two layers are bounded prior to rolling. This model considers the general case of asymmetrical rolling due to unequal surface speed, different contact friction, roll diameters, flow stress, and thickness ratios of the two layers. Using this model, rolling param...
متن کامل