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The pseudospark discharge is a form of low-pressure gas discharge capable of generating extremely high currents with short rise times by means of a unique hollow cathode structure [1-6]. A high-quality electron beam is generated during the later phases of the discharge process, which possesses high current density and brightness, as well as the ability to self-focus via ion channel focusing. This...
Millimeter-wave radiation has been successfully generated by a ∼100GHz BWO driven by a high brightness electron beam derived from a 14-gap pseudospark discharge. Pseudospark electron beams have been studied recently with their application to millimeter-wave and terahertz radiation generation. A BWO utilizing the interaction between an axial electron beam and a slow-wave structure was designed and...
In the SPM-based microplasma etching system proposed in our previous work, the stable discharge performance of microplasma device in reactive gases is the foundation of the following maskless scanning etching. In order to realize microplasma etching of SiO2 or Si3N4, CHF3 or CHF3/Ar mixtures is chosen as the operating gas. Although discharge characteristics of microcavity plasma devices in rare gases...
An experimental simulation of the Earth's Auroral Magnetosphere has been created. Experiments have been undertaken to study the processes by which the auroral cyclotron maser emission occurs.
The Terahertz band of EM spectrum has received considerable research interests recently. A micro-klystron has the potential to meet the requirement of high power and compact terahertz source in many applications. The micro-klystron needs a very thin electron beam with sufficient current density. A pseudospark discharge cathode has the ability to provide high current density with small diameter electron...
Presented in this paper is the design of a W-Band Gyro-BWO with a helically corrugated waveguide and a cusp electron gun. The interaction region has been constructed with good accuracy and microwave results measured using a vector network analyzer are given. The microwave dispersion agrees well with analytical and numerical theory. The transmission loss of this helically corrugated waveguide was measured...
Summary form only given. First measurements of microwave radiation from a co-axial free-electron maser (FEM) based on two-dimensional (2D) distributed feedback are presented. To drive the FEM a high current accelerator (HCA) based on a magnetically insulated explosive emission carbon cathode was used. A driving electron beam voltage (Vhsa) of 450 kV and pulse duration of ~200 ns was applied to the...
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