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Updated: Jun 7, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
Simultaneous two-dimensional laser-induced-fluorescence measurements of argon ions
A K Hansen1, Matthew Galante, Dustin McCarren
1Department of Physics, West Virginia University, P.O. Box 6315, Morgantown, West Virginia 26506-6315, USA. alex.hansen@mail.wvu.edu
Abstract:
Recent laser upgrades on the Hot Helicon Experiment at West Virginia University have enabled multiplexed simultaneous measurements of the ion velocity distribution function at a single location, expanding our capabilities in laser-induced fluorescence diagnostics. The laser output is split into two beams, each modulated with an optical chopper and injected perpendicular and parallel to the magnetic field. Light from the crossing point of the beams is transported to a narrow-band photomultiplier tube filtered at the fluorescence wavelength and monitored by two lock-in amplifiers, each referenced to one of the two chopper frequencies.
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