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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

Publicado 4 números por año

ISSN Imprimir: 1093-3611

ISSN En Línea: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

Indexed in

WIDE-APERTURE ELECTRON SOURCE WITH A PLASMA GRID EMITTER

Volumen 19, Edición 1, 2015, pp. 77-84
DOI: 10.1615/HighTempMatProc.2015015731
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SINOPSIS

This paper presents a theoretical and experimental investigation of the formation and transport of a large cross-section beam in a low-pressure gas, the discharge plasma characteristics in an electron source with a plasma emitter and beam extraction into the atmosphere through a thin foil. In such a source, the electron beam is a superposition of elementary beams formed by separate emission structures, the plasma boundary of which is stabilized by a fine metal grid. In experiments at an accelerating voltage of 200 kV, emission current of 16 A, and pulse duration of 40 μs, about 4 kW of the beam average power is extracted from the accelerating gap into the atmosphere at the geometric transparency of a supporting grid of the exit foil window equal to 56%. Numerical investigation of the discharge plasma generation, formation and transport of an electron beam also is carried out. It is shown that the characteristics of the discharge plasma depend on the resistance in the hollow anode circuit of the discharge system and on the mask surface area. The main beam current losses are associated with the expansion of the elementary electron beams cross section in the accelerating gap, plasma flowing-in behind the mask, ion current, and losses on the foil.

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