Frequency up-conversion for the reflectionless propagation of a high-power microwave pulse in a self-generated plasma

Spencer P. Kuo; A. Ren; Y. S. Zhang

doi:10.1117/12.43505

1 April 1991 Frequency up-conversion for the reflectionless propagation of a high-power microwave pulse in a self-generated plasma

Spencer P. Kuo, A. Ren, Y. S. Zhang

Author Affiliations +

Proceedings Volume 1407, Intense Microwave and Particle Beams II; (1991) https://doi.org/10.1117/12.43505
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

33In the study of the propagation of high power microwave pulse, one of the main concerns is how to minimize the energy loss of the pulse before reaching the destination. In the very high power region, one has to prevent the cutoff reflection caused by the excessive ionization in the background air. A frequency auto-conversion process which can lead to reflectionless propagation of powerful EM pulses in self-generated plasmas is studied. The theory shows that under the proper condition the carrier frequency (Omega) of the pulse will indeed shift upward with the growth of plasma frequency (Omega) pe. Thus, the plasma during breakdown will always remain transparent to the pulse (i.e., (Omega) >(Omega) pe). A chamber experiment demonstrating the frequency auto-conversion during the pulse propagation through the self-generated plasma is then conducted in a chamber. The detected frequency shift is compared with the theoretical result calculated by using the measured electron density distribution along the propagation path of the pulse. Good agreement between the theory and the experimental results is obtained.

Citation Download Citation

Spencer P. Kuo, A. Ren, and Y. S. Zhang "Frequency up-conversion for the reflectionless propagation of a high-power microwave pulse in a self-generated plasma", Proc. SPIE 1407, Intense Microwave and Particle Beams II, (1 April 1991); https://doi.org/10.1117/12.43505

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