Production of vibrationally cold ions using a radio-frequency storage ion source

Journal Article · Thu May 01 04:00:00 EDT 1986 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1139206· OSTI ID:5970733

Sen, A; Mitchell, J B.A.

A storage ion source has been built for the production of vibrationally cold H/sup +//sub 2/ and H/sup +//sub 3/ ions. Using a gas mixture of H/sub 2/ and rare gases (Ne and He) in the source at high pressure, higher vibrational states of these ions have been effectively depleted by ion--molecule reactions and collisional deactivation. The internal energy of the cold ions was determined by the threshold measurement of collision-induced dissociation. With a mixture of H/sub 2/ and Ne (ratio 1 : 5) in the source operated at 80 mTorr, H/sup +//sub 2/ ions were found to be in v = 0 and 1 states only and the H/sup +//sub 3/ ions were in the ground vibrational state.

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5970733
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 57:5; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301* -- Particle Accelerators-- Ion Sources
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
DESIGN
DISSOCIATION
EFFICIENCY
ENERGY LEVELS
EXCITED STATES
HYDROGEN IONS
ION COLLISIONS
ION SOURCES
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONS
MOLECULAR IONS
MOLECULE COLLISIONS
OPERATION
PERFORMANCE
TRAPPING
VIBRATIONAL STATES