Experiments on interactions of electrons with molecular ions in fusion and astrophysical plasmas

M. E. Bannister, H. Aliabadi, E. M. Bahati, M. R. Fogle, P. Krstic, C. R. Vane, A. Ehlerding, W. Geppert, F. Hellberg, V. Zhaunerchyk, M. Larsson, R. D. Thomas

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Through beam-beam experiments at the Multicharged Ion Research Facility (MIRF) at Oak Ridge National Laboratory (ORNL) and at the CRYRING heavy ion storage ring at Stockholm University, we are seeking to formulate a more complete picture of electron-impact dissociation of molecular ions. These inelastic collisions play important roles in many low temperature plasmas such as in divertors of fusion devices and in astrophysical environments. An electron-ion crossed beams experiment at ORNL investigates the dissociative excitation and dissociative ionization of molecular ions from a few eV up to 100 eV. Measurements on dissociative recombination (DR) experiments are made at CRYRING, where chemical branching fractions and fragmentation dynamics are studied. Taking advantage of a 250-kV acceleration platform at the MIRF, a merged electron-ion beams energy loss apparatus is employed to study DR down to zero energy. Recent results on the dissociation of molecular ions of importance in fusion and astrophysics are presented.

Original languageEnglish
Title of host publicationAtomic Processes in Plasmas - 15th International Conference on Atomic Processes in Plasmas, APiP
Pages197-205
Number of pages9
DOIs
StatePublished - 2007
Event15th International Conference on Atomic Processes in Plasmas, APiP - Gaithersburg, MD, United States
Duration: Mar 19 2007Mar 22 2007

Publication series

NameAIP Conference Proceedings
Volume926
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference15th International Conference on Atomic Processes in Plasmas, APiP
Country/TerritoryUnited States
CityGaithersburg, MD
Period03/19/0703/22/07

Keywords

  • Dissociation
  • Ion recombination

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