Inverted Magnetron

Hull, J.F.

doi:10.1109/jrproc.1952.273869

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…The large cathode area therefore makes the RPM an especially promising HPM source. The inverted cylindrical magnetron variant (where the cathode resides on the outside, and the anode on the inside) solves the small-area cathode problem with the added advantage of enhanced electron bunching in the circular bends because of the negative mass instability [30][31][32], but suffers from heat dissipation issues from the smaller anode area, and introduces considerable practical challenges for microwave extraction from the anode [33][34][35]. Other RPM advantages include a favorable scaling of the magnetic field volume with cavity number (as N ), a large anode volume that facilitates heat dissipation, and a decoupled relation between the cavity number and Anode-Cathode Gap (AK gap) spacing.…”

Section: Introductionmentioning

confidence: 99%

Multi-frequency recirculating planar magnetrons

Greening

Jordan

Exelby

et al. 2016

Applied Physics Letters

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The multi-frequency recirculating planar magnetron (MFRPM) is the first magnetron capable of simultaneous generation of significantly different output frequencies (1 and 2 GHz) in a single operating pulse. Design and simulation of a prototype MFRPM were followed by hardware fabrication and experimental verification using the Michigan Electron Long Beam Accelerator with a Ceramic insulator at −300 kV, 1–5 kA, and 0.14–0.23 T axial magnetic field. Preliminary results demonstrated simultaneous generation of microwave pulses near 1 GHz and 2 GHz at powers up to 44 MW and 21 MW, respectively, with peak total efficiencies up to 9%.

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Section: Introductionmentioning

confidence: 99%

Multi-frequency recirculating planar magnetrons

Greening

Jordan

Exelby

et al. 2016

Applied Physics Letters

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“…Inverted magnetrons [63] have traditionally shown faster startup than their conventional counterparts. In particular, simulations of the recirculating planar magnetron [11]- [14] show bunching occurred quickly in the recirculating bends if the device was in an inverted configuration.…”

Section: Introductionmentioning

confidence: 99%

Stability of Brillouin flow in planar, conventional, and inverted magnetrons

et al. 2015

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The Brillouin flow is the prevalent flow in crossed-field devices. We systematically study its stability in the conventional, planar, and inverted magnetron geometry. To investigate the intrinsic negative mass effect in Brillouin flow, we consider electrostatic modes in a nonrelativistic, smooth bore magnetron. We found that the Brillouin flow in the inverted magnetron is more unstable than that in a planar magnetron, which in turn is more unstable than that in the conventional magnetron. Thus, oscillations in the inverted magnetron may startup faster than the conventional magnetron. This result is consistent with simulations, and with the negative mass property in the inverted magnetron configuration. Inclusion of relativistic effects and electromagnetic effects does not qualitatively change these conclusions.

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Magnetisch gesteuerte Raumladungsfelder

Ollendorff¹

1957

Elektronik Freier Raumladungen

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Inverted Magnetron

Cited by 10 publications

References 2 publications

Multi-frequency recirculating planar magnetrons

Multi-frequency recirculating planar magnetrons

Stability of Brillouin flow in planar, conventional, and inverted magnetrons

Magnetisch gesteuerte Raumladungsfelder

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