Experimental investigation of a relativistic magnetron with diffraction output on a repetitive short pulse generator

Li, Wei; Zhang, Jun; Zhang, Zicheng; Xiao, Sun; Liu, Yonggui

doi:10.1063/1.4873381

Cited by 5 publications

(1 citation statement)

References 18 publications

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“…In previous studies, we explored the means of glow discharge in air under atmospheric pressure based on the idea of nonuniform electric field design and elevation of initial electrons. Based on this, contact electrode structures were designed to achieve stable glow discharge in atmospheric air, and the surface of polyester fibers was modified and good modification effect was obtained . However, in these studies, the materials to be treated must be in close contact with the electrodes, and the treated area of the materials is small, and the thickness of the treated materials is seriously affected.…”

Section: Introductionmentioning

confidence: 99%

Study on atmospheric air glow discharge plasma generation based on multiple potentials and aramid fabric surface modification

Zhao

Liu

et al. 2019

Plasma Processes & Polymers

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A method of forming large‐area glow discharge plasmas with good diffusivity in atmospheric air based on the composite network‐surface laminated electrode structure with multiple potentials is proposed. This method can enhance the intensity of the space electric field and generate glow discharge plasma under the condition that the voltage is lower than 1 kV. Through the alternating electric field, the charged particles diffuse from the surface of the electrode to the space to enhance the treatment of aramid fabric. According to the changes of surface morphology, contact angle and surface energy of aramid fabric, it can be seen that the surface roughness and surface energy of the material treated by plasma are significantly improved. After 30 s of treatment, the contact angle decreases by 83.85° and the surface energy increases 3.4 times. This method has the advantages of low discharge voltage, good discharge uniformity, good material treatment effect, and so forth. It has good application prospects for the industrialization of aramid fabric surface modification with high efficiency.

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Section: Introductionmentioning

confidence: 99%

Study on atmospheric air glow discharge plasma generation based on multiple potentials and aramid fabric surface modification

Zhao

Liu

et al. 2019

Plasma Processes & Polymers

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Outgassing rate analysis of a velvet cathode and a carbon fiber cathode

Fan

Qian

et al. 2017

Journal of Applied Physics

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In this paper, the outgassing-rates of a carbon fiber array cathode and a polymer velvet cathode are tested and discussed. Two different methods of measurements are used in the experiments. In one scheme, a method based on dynamic equilibrium of pressure is used. Namely, the cathode works in the repetitive mode in a vacuum diode, a dynamic equilibrium pressure would be reached when the outgassing capacity in the chamber equals the pumping capacity of the pump, and the outgassing rate could be figured out according to this equilibrium pressure. In another scheme, a method based on static equilibrium of pressure is used. Namely, the cathode works in a closed vacuum chamber (a hard tube), and the outgassing rate could be calculated from the pressure difference between the pressure in the chamber before and after the work of the cathode. The outgassing rate is analyzed from the real time pressure evolution data which are measured using a magnetron gauge in both schemes. The outgassing rates of the carbon fiber array cathode and the velvet cathode are 7.3 ± 0.4 neutrals/electron and 85 ± 5 neutrals/electron in the first scheme and 9 ± 0.5 neutrals/electron and 98 ± 7 neutrals/electron in the second scheme. Both the results of two schemes show that the outgassing rate of the carbon fiber array cathode is an order smaller than that of the velvet cathode under similar conditions, which shows that this carbon fiber array cathode is a promising replacement of the velvet cathode in the application of magnetically insulated transmission line oscillators and relativistic magnetrons.

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Performance improvement of a magnetically insulated transmission line oscillator with a carbon fiber array cathode

Fan

Qian

et al. 2019

Review of Scientific Instruments

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A carbon fiber array cathode (CFAC) was presented and tested in a magnetically insulated transmission line oscillator (MILO) in earlier papers; however, the performance of this cathode was not as good as the traditional polymer velvet cathode, and the nonuniform fibers’ distribution on the cathode surface was postulated as the culprit for this. In this paper, this CFAC has been carefully reprocessed, and the performance is improved (efficiency increases from ∼12% to ∼16%) and reaches a level that is as good as the velvet cathode, which means that this CFAC provides a promising substitute for the polymer velvet cathode in MILO.

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Experimental investigation of a relativistic magnetron with diffraction output on a repetitive short pulse generator

Cited by 5 publications

References 18 publications

Study on atmospheric air glow discharge plasma generation based on multiple potentials and aramid fabric surface modification

Study on atmospheric air glow discharge plasma generation based on multiple potentials and aramid fabric surface modification

Outgassing rate analysis of a velvet cathode and a carbon fiber cathode

Performance improvement of a magnetically insulated transmission line oscillator with a carbon fiber array cathode

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