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 H3O(+), 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(+) with O2 proceeds with a rate constant that agrees with the literature measurements, while the reaction of Re2(2+) is found to charge transfer with O2 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(+), which is reacted with N2O to create BaO(+), and we find a rate constant that agrees with the literature.
Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, New Mexico 87117-5776, USA.
Joshua J
JJ
Melko
Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, New Mexico 87117-5776, USA.
Shaun G
SG
Ard
Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, New Mexico 87117-5776, USA.
Nicholas S
NS
Shuman
Ardara Technologies L.P., 12941 Route 993, Ardara, Pennsylvania 15615, USA.
Randall E
RE
Pedder
Ardara Technologies L.P., 12941 Route 993, Ardara, Pennsylvania 15615, USA.
Christopher R
CR
Taormina
Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, New Mexico 87117-5776, USA.
Albert A
AA
Viggiano