Abstract
Transverse coherent density fluctuations at the plasma cutoff layer are modeled by a rippled conducting surface. Two simulations are presented which give the reflectometer back scattered power as functions of ripple wavelength, amplitude, and phase. Results from an experimental simulation of the STOR-M tokamak geometry and a numerical simulation using the Helmholtz integral and a paraxial Gaussian probe beam, agree in showing three ripple wavelength (Λ) sensitivity regions defined by beam radius (w): Short wavelengths Λ/λ≪2w/λ experience large Bragg scattering. Long wavelengths Λ/λ≫10w/λ experience no scattering. Intermediate wavelengths experience complex scattering with strong modulation of reflected power at twice ripple frequency.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.