Increasing the space-charge limit and other effects of cesium seeding in hydrogen negative ion sources

Autor:	R. J. Raridon, J. Bruneteau, J.H. Whealton, M. Bacal
Rok vydání:	2000
Předmět:	Materials science Hydrogen chemistry Caesium chemistry.chemical_element Seeding Electron Plasma Atomic physics Current (fluid) Instrumentation Space charge Ion
Zdroj:	Review of Scientific Instruments. 71:872-874
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1150317
Popis:	The role of cesium seeding in increasing the negative ion current in volume sources is described. By a reduction in the local plasma potential the current of extracted electrons is vastly reduced. As a result, cesium increases the fraction of the transverse space-charge limit available to the ions by as much as a factor of 3. In addition, cesium can increase the total space-charge limit by injection of Cs+ into the presheath—a newly recognized phenomenon consistent with experimental measurements and determined from application of a Double–Vlasov model for negative ion extraction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1e2024923acaace58c3ae44035d972a6 https://doi.org/10.1063/1.1150317 Zobrazit plný text záznamu