Publication details for Prof. Jan R.R. VerletHorke, D. A., Roberts, G. M., Lecointre, J. & Verlet, J. R. R. (2012). Velocity-map imaging at low extraction fields. Review of Scientific Instruments 83(6): 063101.
- Publication type: Journal Article
- ISSN/ISBN: 0034-6748, 1089-7623
- DOI: 10.1063/1.4724311
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
We present a velocity-map imaging (VMI) setup for photoelectron imaging that utilizes low electric extraction fields. This avoids any complications that could arise from electrostatic interactions between the extraction field and the molecular properties that are probed and has a minimal effect on the trajectory of ions in ion beam experiments. By using an attractive potential supplied to the detector, and keeping the electrodes at ground (zero) potential, we show that fringe fields between the VMI arrangement and the vacuum chamber can be eliminated, which is important in experiments on ions.