Investigation of Millimeter-Wavelength 20-Vane Spatial-Harmonic Magnetron Using Three-Dimensional Particle-in-Cell Simulation

We investigate, using the 3-D particle-in-cell simulation code MAGIC, the millimeter-wavelength 20-vane magnetron operating at one of the spatial nonfundamental harmonics of the backward-traveling wave. This spatial harmonic is characterized by 16 ( p = 16) RF electric field variations along the cir...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on plasma science 2012-08, Vol.40 (8), p.1966-1971
Main Authors: Jung-Il Kim, Seok-Gy Jeon, Geun-Ju Kim, Jaehong Kim, Yeryomka, V. D., Kulagin, O. P., Tishchenko, A. S., Naumenko, V. D.
Format: Article
Language:English
Subjects:
Anodes
Blades
Cathodes
Drift-orbital resonance
Electric power
Electric power generation
Electrons
Harmonics
Ions
Magnetic resonance
magnetron
millimeter-wavelength
Particle in cell technique
particle-in-cell
Plasma physics
Power generation
Propagation
Saturation magnetization
Simulation
Solid modeling
spatial-harmonic
Three dimensional
Vanes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate, using the 3-D particle-in-cell simulation code MAGIC, the millimeter-wavelength 20-vane magnetron operating at one of the spatial nonfundamental harmonics of the backward-traveling wave. This spatial harmonic is characterized by 16 ( p = 16) RF electric field variations along the circumference of the magnetron interaction space (oscillation region). We call this magnetron as the "spatial-harmonic" magnetron operating in the "spatial-harmonic mode." Calculated electron distribution reveals 16 electron spokes in the interaction space, which confirms the spatial-harmonic mode of the magnetron operation at p = 16. We observe a saturated output power of 3.2 kW, which corresponds to a power conversion efficiency of 12.3% when the applied voltage is 6.5 kV and the external magnetic field is 0.4 T. The operating frequency is 35.2 GHz. The collected anode current is 4 A when the current emitted from the cathode is 6.3 A. The dissipated power at each anode vane, depending on the anode vane position, is varied by the factor 1.8. The energy of back-bombarding electrons on the cathode increases from 305 to 503 eV while the spatial-harmonic magnetron operation is stabilized.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2012.2202693