Reflectron velocity map ion imaging

摘要

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.