Microwave Power and Phase Measurements on a Recirculating Planar Magnetron

Author

Franzi, Matthew A. ; Greening, Geoffrey B. ; Jordan, Nicholas M. ; Gilgenbach, Ronald M. ; Simon, David H. ; Lau, Y.Y. ; Hoff, Brad W. ; Luginsland, John

Author_Institution

Plasma, Pulsed Power, & Microwave Lab., Univ. of Michigan, Ann Arbor, MI, USA

Volume

43

Issue

5

fYear

2015

fDate

May-15

Firstpage

1675

Lastpage

1682

Abstract

Calibrated microwave power and phase measurements are presented for the first recirculating planar magnetron prototype consisting of two coupled six-cavity 1-GHz planar cavity arrays. The results are presented for a solid cathode and two mode-control cathodes (MCCs) with aluminum or velvet electron emitters. The measurements were conducted using a prototype coaxial microwave power extraction scheme. The experimental operating parameters included: pulsed cathode voltages between -250 and -300 kV, voltage pulselengths of 200-600 μs, axial magnetic fields of 0.1-0.32 T, and entrance currents of 1-10 kA. The results showed improved oscillator frequency locking for the MCCs and increases in power and efficiency using the velvet electron emitter.

Keywords

cathodes; electron emission; magnetrons; phase measurement; power measurement; MCC; aluminum electron emitters; coupled six-cavity 1-GHz planar cavity arrays; current 1 kA to 10 kA; magnetic flux density 0.1 T to 0.32 T; microwave power measurements; oscillator frequency locking; phase measurements; prototype coaxial microwave power extraction scheme; pulsed cathode voltages; recirculating planar magnetron prototype; solid cathode; time 200 mus to 600 mus; two mode-control cathodes; velvet electron emitters; voltage -250 kV to -300 kV; Aluminum; Cathodes; Electromagnetic heating; Microwave measurement; Microwave oscillators; Phase measurement; Cavity magnetron; frequency locking; high-power microwaves (HPMs); recirculating planar magnetron (RPM); vacuum electronics; vacuum electronics.;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2015.2417774

Filename

7084643