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Algorithm allowing to study the atomic structure and electronic structure of nanoemitters based on carbon nan-otubes (CNT) was developed by quantum approach for the first time. This algorithm takes into account the heterogeneity of the electric field. It was established that the distribution of the electrostatic field intensity varies greatly with the advent of the atoms of the plasma in the area...
Pseudospark switches are fast-closing low-pressure gas discharge switches with a hollow-cathode geometry. They can be triggered optically or by electron injection, where electrons emitted from a cold cathode emitter are accelerated in the electric field and initiate breakdown. The efficiency of charge carrier accumulation in the hollow-cathode structure determines the performance of the switch operation...
Carbon nanotube (CNT) with unique structure and excellent physical property such as low turn-on electric field and high emission current, stable emission current, long life time is a promising material for electron source and electrode. In this conference, micro-sized plasma sustained in low pressure hydrogen gas by using CNTs as electrode will be presented. By microscopy and digital camera, the discharge...
Summary form only given. We present the development of a plasma-enhanced chemical vapor deposition (PECVD) system for deposition of multi-walled, vertically aligned Carbon Nano-Tubes (CNT) as cathode field emitter sites in a large (1000 x 1000), 1 cm2 area array. The CNT deposition is compatible with the use of Si wafers containing the individual emitter site ballasts in the form of Si n-type JFETs...
In general, for plasma switches, the initiation of the plasma is critical and this is usually achieved by a ??trigger?? scheme. The seed electrons needed to initiate a breakdown can be generated by several means such as thermionic, field or optical emission. While the thermionic emission has been used mainly in vacuum tubes and is a mature technology, field emission (or cold-cathode electron emission)...
The field-emission cathode has potential application in the field emission display panels, high frequency amplifiers, X-ray sources, cathodoluminescent light sources. Many research works have been focused on the improvement of field-emission performance of a carbon nanotube cathode. A few methods, such as adhesive taping, soft rubber rolling, mechanical rubbing, plasma etching, and laser irradiating,...
This presentation deals on the preparation and field-emission behaviour of CNT-based cold cathodes to be used in space-related applications and for fabrication of miniaturized X-ray tubes (NANORAY project, FP7-SME-2007).
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