Abstract
Radiation in the millimeter range with a broad spectrum was observed in laser plasma interaction experiments. The spectral region range of the radiation is from 26.5 to 325 GHz, which is the upper limit of the present detector, with a pulse duration of 200 ps. The direction of the radiation is symmetrical from 30 to 60° with respect to the laser direction, and its poralization is in the radial direction, i.e., the TM01 mode. This suggests that the radiation is generated by the radial oscillation of plasma electrons under the electric field of a laser generated immovable ion column. The frequency of the radiation depends on the initial electron velocity that is accelerated by the laser-generated ponderomotive force at the focal spot. To explain the angular distribution of the radiation, the radiation is emitted from the plasma column. The numerical calculation of the distribution is in good agreement with the experimental data.
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.
