Abstract
where i is wavelength of the probe radiation; 8 is the scattering angle; k D = (Te/4~nee2) I/2 is the Debye radius; ne, T e are the electron concentration and temperature; e is the charge of the electron. For e > i corresponds to collective radiation scattering, and analysis of its spectrum allows the ion temperature to be measured, independently of electron concentration, and plasma oscillations and instabilities to be studied. As is evident from the expression for ~, using lasers for diagnostics in the visibie and IR regions of hot plasma (T e -~ 1 KeV) with moderate density (n e = 10• cm -3) collective processes can only be observed with small scattering angles, which prevents localized measurements and makes the detection of useful signals difficult. Switching to a laser in the submiiiimeter (SVIM) region allows operation at angles up to ~/2 (which significantly increases spatial resolution) and allows heterodyne methods of detection to be used. Furthermore, the scattered power is proportional to the square of the wavelength of the probe radication, whch eases detection.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
