{"title":"Runaway Electrons in a Gas Diode with a Wedge-Shaped Cathode","authors":"N. M. Zubarev, O. V. Zubareva, M. I. Yalandin","doi":"10.1134/S1063784224060495","DOIUrl":null,"url":null,"abstract":"<p>The features of electron runaway in a gas diode with a wedge-shaped cathode providing a sharply inhomogeneous distribution of the electric field in the interelectrode gap are studied. It is shown that the character and conditions of runaway are qualitatively different for wedges with relatively large and small opening angles, i.e., in fact, for different degrees of field inhomogeneity. In the first case, the transition to the runaway mode is determined by the behavior of electrons in the immediate vicinity of their starting point, the vertex of the wedge-shaped cathode. For a wedge close in shape to a blade (opening angle less than 30° degrees), the relative contribution of the braking force for electrons in the gas increases with distance from the cathode, and their behavior at the periphery, near the anode, begins to play a key role in the analysis of runaway conditions. The influence of an external magnetic field on the geometry of the ionized region near the wedge vertex, starting from which the electrons become runaways, is also discussed.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1846 - 1856"},"PeriodicalIF":1.1000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Technical Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063784224060495","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
The features of electron runaway in a gas diode with a wedge-shaped cathode providing a sharply inhomogeneous distribution of the electric field in the interelectrode gap are studied. It is shown that the character and conditions of runaway are qualitatively different for wedges with relatively large and small opening angles, i.e., in fact, for different degrees of field inhomogeneity. In the first case, the transition to the runaway mode is determined by the behavior of electrons in the immediate vicinity of their starting point, the vertex of the wedge-shaped cathode. For a wedge close in shape to a blade (opening angle less than 30° degrees), the relative contribution of the braking force for electrons in the gas increases with distance from the cathode, and their behavior at the periphery, near the anode, begins to play a key role in the analysis of runaway conditions. The influence of an external magnetic field on the geometry of the ionized region near the wedge vertex, starting from which the electrons become runaways, is also discussed.
期刊介绍：
Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.
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