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TJ-II:Reflectometry: Difference between revisions
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The system consists of a circular choked-corrugated antenna | The system consists of a circular choked-corrugated antenna | ||
<ref>[http://ieeexplore.ieee.org/search/wrapper.jsp?arnumber=1696015 J. Teniente, R. Gonzalo, and C. del-Rio, IEEE Antennas Wireless Propag. Lett. '''5''' (2006) 380]</ref> | <ref>[http://ieeexplore.ieee.org/search/wrapper.jsp?arnumber=1696015 J. Teniente, R. Gonzalo, and C. del-Rio, IEEE Antennas Wireless Propag. Lett. '''5''' (2006) 380]</ref> | ||
(fabricated by the [http://antenas.unavarra.es/ ''Antenna Group of the Public University of Navarra, Spain'']) which emits a microwave beam with a gaussian electric field distribution. The beam is reflected by a steerable ellipsoidal mirror to the plasma. The mirror serves for two purposes: 1) focus the microwave beam to the region where backscattering takes place and 2) change the angle of incidence between beam and plasma, giving the possibility to select the turbulence scale to be measured. The [[Effective_plasma_radius|radial]] position of scattering and the probed perpendicular wavenumber are calculated after the discharge using the 3D ray/beam-tracing code [[TRUBA]]. | (fabricated by the [http://antenas.unavarra.es/ ''Antenna Group of the Public University of Navarra, Spain'']) which emits a microwave beam with a gaussian electric field distribution. The beam is reflected by a steerable ellipsoidal mirror to the plasma. The mirror serves for two purposes: 1) focus the microwave beam (obtaining plane wavefronts) to the region where backscattering takes place and 2) change the angle of incidence between beam and plasma, giving the possibility to select the turbulence scale to be measured. | ||
Different scenarios can be realized: Positive or negative incidence angles of the incident beam or perpendicular incidence, which is equivalent to a conventional reflectometer system. The [[Effective_plasma_radius|radial]] position of scattering and the probed perpendicular wavenumber are calculated after the discharge using the 3D ray/beam-tracing code [[TRUBA]]. | |||
==References== | ==References== | ||
<references /> | <references /> | ||