Application of Langmuir Probe in Recombination Dominated Afterglow Plasma

✍ Scribed by I. Korolov; T. Kotrík; R. Plašil; J. Varju; M. Hejduk; J. Glosík

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 286 KB
• Volume: 48
• Category: Article
• ISSN: 0005-8025
• DOI: 10.1002/ctpp.200810084

✦ Synopsis

Abstract

New advanced data analysis method for calculation of recombination rate coefficients from the decay of electron density during the afterglow (along the flow tube) in a Flowing Afterglow Langmuir Probe (FALP) experiment is presented. The method is advantageous for measurements of recombination rate coefficients of slowly recombining ions in conditions where formation of the studied ions is slow, decaying plasma contains several types of ions and the ion formation and recombination proceed simultaneously. The new method is demonstrated on the analysis of the data obtained from plasma decay in He/Kr/H~2~ and He/Kr/D~2~ gas mixtures. In a limit for [Kr]/[D~2~] ≫ 1, the recombination rate coefficients for KrD^+^ ions α (KrD^+^, 250 K) = 1 × 10^8^cm^3^s^–1^ was obtained. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)