Velocity map imaging in time of flight mass spectrometry

M Brouard; E K Campbell; A J Johnsen; C Vallance; W H Yuen; A Nomerotski

doi:10.1063/1.3036978

Velocity map imaging in time of flight mass spectrometry

Rev Sci Instrum. 2008 Dec;79(12):123115. doi: 10.1063/1.3036978.

Authors

M Brouard¹, E K Campbell, A J Johnsen, C Vallance, W H Yuen, A Nomerotski

Affiliation

¹ The Department of Chemistry, The Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom. mark.brouard@chem.ox.ac.uk

PMID: 19123553
DOI: 10.1063/1.3036978

Abstract

A new variation on time of flight mass spectrometry is presented, which uses a fast framing charge coupled device camera to velocity map image multiple product masses in a single acquisition. The technique is demonstrated on two photofragmentation processes, those of CS(2) and CH(3)S(2)CH(3) (dimethyldisulfide) at a photolysis wavelength of 193 nm. In both cases, several mass fragments are imaged simultaneously, and speed distributions and anisotropy parameters are extracted that are comparable to those obtained by imaging each fragment separately in conventional velocity map imaging studies.