Patent ID: 7923681
Filing Date: 2011-04-12
Classification: H01J

Abstract:
1. A collision cell comprising at least one electrode and also comprising: a straight section having an inlet for receiving a precursor ion at a first end; said straight section configured to, at least one of, allow fragmentation of said precursor ion to generate product ions, allow said precursor ion to lose kinetic energy as it passes through said straight section from a first to a second end and allow said product ions to lose kinetic energy as it passes through said straight section from the first to the second end; a curved section downstream of the second end of the straight section; the curved section configured to allow fragmentation of said precursor ion and to generate product ions therefrom; wherein the straight section is about twenty-five millimeters to four centimeters in length, and the curved section has a mean radius of curvature of about forty-five millimeters to about fifty millimeters along its longitudinal axis.