Laser desorption ion source having an ion guide that bind to ion mass spectrometry

摘要

To increase the measurement sensitivity and ion sampling efficiency by using the ion guide one or more capture efficiently the ions in the plume emitted from the ion target, laser desorption ion source, opening the ion I induced in the vacuum chamber downstream in part via. In one configuration using an RF multipole ion guides least 2, RF multipole ion guide first are placed adjacent to the ion target, so that it is large enough to capture most of the plume It is selected, whereas, RF multipole ion guide in the second, which is disposed between the opening and the multipole ion guide, the first has a smaller size to assist in focusing the opening of ion . Induced to the RF multipole ion guide in the second ions in the plume, then, RF multipole ion the first vacuum chamber downstream of the ion passes through the aperture RF multipole ion guide in the second to focus the ion to enter within.