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Title: Coupling an electrospray source and a solids probe/chemical ionization source to a selected ion flow tube apparatus

A new ion source region has been constructed and attached to a variable temperature selected ion flow tube. The source features the capabilities of electron impact, chemical ionization, a solids probe, and electrospray ionization. The performance of the instrument is demonstrated through a series of reactions from ions created in each of the new source regions. The chemical ionization source is able to create H{sub 3}O{sup +}, but not as efficiently as similar sources with larger apertures. The ability of this source to support a solids probe, however, greatly expands our capabilities. A variety of rhenium cations and dications are created from the solids probe in sufficient abundance to study in the flow tube. The reaction of Re{sup +} with O{sub 2} proceeds with a rate constant that agrees with the literature measurements, while the reaction of Re{sub 2}{sup 2+} is found to charge transfer with O{sub 2} at about 60% of the collision rate; we have also performed calculations that support the charge transfer pathway. The electrospray source is used to create Ba{sup +}, which is reacted with N{sub 2}O to create BaO{sup +}, and we find a rate constant that agrees with the literature.
Authors:
; ; ;  [1] ; ;  [2]
  1. Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, New Mexico 87117-5776 (United States)
  2. Ardara Technologies L.P., 12941 Route 993, Ardara, Pennsylvania 15615 (United States)
Publication Date:
OSTI Identifier:
22482749
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BARIUM OXIDES; CATIONS; IONIZATION; NITROUS OXIDE; OXONIUM IONS; PERFORMANCE; PROBES; REACTION KINETICS; RHENIUM; RHENIUM IONS; SOLIDS; TUBES