We report the first demonstration of velocity map ion imaging in a reflectron configuration. Under these conditions, the velocity-resolving capabilities associated with velocity map ion imaging are achieved simultaneously with long flight times and the high mass resolution characteristic of reflectron time-of-flight mass spectrometers. The photodissociation of OCS at 230 nm has been used to characterize the velocity-focusing performance of the instrument. The reflectron geometry provides an increased magnification factor over conventional velocity map ion imaging.
Bibliographical noteFunding Information:
This work was supported by the Director, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences, of the U.S. Department of Energy under Contract No. DE-AC02-9810886 through the BNL LDRD program and under DE-FG02–04ER15593 at Wayne State University.