HEM11 mode magnetically insulated transmission[2mm] line oscillator: simulation and experiment

doi:10.1088/1674-1056/21/8/084101

Abstract A novel magnetically insulated transmission line oscillator (MILO) in which a modified HEM₁₁ mode is taken as its main interaction mode (HEM₁₁ mode MILO) is simulated and experimented in this paper. The excitation of the oscillation mode is made possible by carefully adjusting the arrangement of each resonant cavity in a two-dimensional slow wave structure. The special feature of such a device is that in the slow-wave-structure region, the interaction mode is HEM₁₁ mode which is a TM-like one that could interact with electron beams effectively; and in the coaxial output region, the microwave mode is TE₁₁ mode which has a favourable field density pattern to be directly radiated. Employing an electron beam of about 441 kV and 39.7 kA, HEM₁₁ mode MILO generates a high power microwave output of about 1.47 GW at 1.45 GHz in particle-in-cell simulation. The power conversion efficiency is about 8.4 % and the generated microwave is in a TE₁₁-like circular polarization mode. In a preliminary experiment investigation, high power microwave is detected from the device with a frequency of 1.46 GHz, an output energy of 43 J-47 J, and a pulse duration of 44 ns-49 ns when the input voltage is 430 kV-450 kV, and the diode current is 37 kA-39 kA.

Keywords: high power microwave magnetically insulated transmission line oscillator asymmetric mode HEM₁₁ mode

Received: 15 October 2011
Revised: 04 January 2012
Accepted manuscript online:

PACS:	41.60.Bq	(Cherenkov radiation)
	41.75.Ht	(Relativistic electron and positron beams)

Corresponding Authors: Wang Dong
E-mail: mr20001@sina.com

Cite this article:

Wang Dong (王冬), Qin Fen (秦奋), Wen Jie (文杰), Chen Dai-Bing (陈代兵), Jin Xiao (金晓), An Hai-Shi (安海狮), Zhang Xin-Kai (张新凯 ) HEM₁₁ mode magnetically insulated transmission[2mm] line oscillator: simulation and experiment 2012 Chin. Phys. B 21 084101

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HEM11 mode magnetically insulated transmission[2mm] line oscillator: simulation and experiment

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HEM₁₁ mode magnetically insulated transmission[2mm] line oscillator: simulation and experiment