Color separation in an argon-helium arc due to radiative properties and demixing

Authors
Citation
Ab. Murphy, Color separation in an argon-helium arc due to radiative properties and demixing, IEEE PLAS S, 27(1), 1999, pp. 30-31
Citations number
4
Categorie Soggetti
Physics
Journal title
IEEE TRANSACTIONS ON PLASMA SCIENCE
ISSN journal
00933813 → ACNP
Volume
27
Issue
1
Year of publication
1999
Pages
30 - 31
Database
ISI
SICI code
0093-3813(199902)27:1<30:CSIAAA>2.0.ZU;2-N
Abstract
Free-burning arcs in argon-helium mixtures containing a large proportion of helium show a separation between the pink color characteristic of helium a rcs and the violet color typical of argon arcs, Two effects are shown to co ntribute to this; first, demixing, which concentrates helium in the high-te mperature region near the center of the are, and second the fact that the r adiative emission from helium, relative to that from argon, increases with temperature.