Speaker
Description
The University of New Mexico (UNM) proposed a compact magnetron with diffraction output (MDO) that is consistent with a permanent magnet guide magnetic field [1,2]. This compact high power microwave (HPM) source was tested at UNM and the particle-in-cell simulations accurately predicted its experimental operation [3]. This compact MDO was then tested at NSWCDD using a rep-rated power modulator. The power modulator was developed in a manner to drive a variety of potential relativistic RF sources with varying impedance and voltage requirements, providing flexibility for potential changes in drive voltage, impedance, and pulse width/repetition rate. UNM’s compact MDO with a permanent magnet was the first source to be tested. The initial pulse width and repetition rate settings ranged from 50 – 250 ns and up to 10 Hz, respectively, allowing the investigation of pulse shortening, efficiencies at high repetition rate conditions, and possible interactions between the two conditions. The experimental results of this testing will be presented. Finally, plans for testing UNM’s full S-band MDO [4] with a superconducting magnet will also be described.
- C. Leach, S. Prasad, M. Fuks, and E. Schamiloglu, “Compact Relativistic Magnetron with Gaussian Radiation Pattern,” IEEE Trans. Plasma Sci., vol. 40, 3116-3120 (2012).
- C. Leach, S. Prasad, M. Fuks, and E. Schamiloglu, “Compact A6 Magnetron with Permanent Magnet,” Proc. 2012 IEEE International Vacuum Electronics Conference (Monterey, CA, 24-26 April 2012), p. 491-492.
- A. Sandoval, “Experimental Verification of A6 Magnetron with Permanent Magnet” (M.S. Thesis, University of New Mexico, Albuquerque, NM, 2018).
- M. Fuks and E. Schamiloglu, “70% Efficient Relativistic Magnetron with Axial Extraction of Radiation Through a Horn Antenna,” IEEE Trans. Plasma Sci., vol. 38, 1302-1312 (2010).
*Research at UNM was supported by ONR Grants N00014-16-1-2352 and N00014-16-1-3101. Research at NSWCDD was supported by ONR 30, ONR 35, and JNLWD.
