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Title: Puzzling differences in bismuth and lead plasmas: evidence for thesignificant role of neutrals in cathodic vacuum arcs

Abstract

Time-dependent ion charge state measurements for Pb and Bicathodic arc plasmas revealed unexpectedly strong differences: the meanBi ion charge state dropped much stronger and with a longer time constantthan the mean Pb ion charge state. It is shown that the difference inthermal conductivity led to much higher vapor pressure for Bi, which inturn much more effectively caused charge exchange collisions. The resultshave implications beyond Pb and Bi plasmas, most importantly that the"true" charge states as emitted from the cathode spot are higher thanwhat is generally measured and published.

Authors:
;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE. Department of Energy. Initiatives for ProliferationPrevnetion (IPP) project IPP-LBNL-196
OSTI Identifier:
918637
Report Number(s):
LBNL-62639
R&D Project: Z2PA196
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 102; Journal Issue: 4; Related Information: Journal Publication Date: 08/20/2007
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Cathodic vacuum arc Bi Pb ion charge states

Citation Formats

Anders, Andre, and Yushkov, Georgy Yu. Puzzling differences in bismuth and lead plasmas: evidence for thesignificant role of neutrals in cathodic vacuum arcs. United States: N. p., 2007. Web. doi:10.1063/1.2776858.
Anders, Andre, & Yushkov, Georgy Yu. Puzzling differences in bismuth and lead plasmas: evidence for thesignificant role of neutrals in cathodic vacuum arcs. United States. doi:10.1063/1.2776858.
Anders, Andre, and Yushkov, Georgy Yu. Thu . "Puzzling differences in bismuth and lead plasmas: evidence for thesignificant role of neutrals in cathodic vacuum arcs". United States. doi:10.1063/1.2776858. https://www.osti.gov/servlets/purl/918637.
@article{osti_918637,
title = {Puzzling differences in bismuth and lead plasmas: evidence for thesignificant role of neutrals in cathodic vacuum arcs},
author = {Anders, Andre and Yushkov, Georgy Yu.},
abstractNote = {Time-dependent ion charge state measurements for Pb and Bicathodic arc plasmas revealed unexpectedly strong differences: the meanBi ion charge state dropped much stronger and with a longer time constantthan the mean Pb ion charge state. It is shown that the difference inthermal conductivity led to much higher vapor pressure for Bi, which inturn much more effectively caused charge exchange collisions. The resultshave implications beyond Pb and Bi plasmas, most importantly that the"true" charge states as emitted from the cathode spot are higher thanwhat is generally measured and published.},
doi = {10.1063/1.2776858},
journal = {Applied Physics Letters},
number = 4,
volume = 102,
place = {United States},
year = {Thu May 10 00:00:00 EDT 2007},
month = {Thu May 10 00:00:00 EDT 2007}
}