A Conjoined Rectilinear Collision Cell and Pulsed Extraction Ion Trap with Auxiliary DC Electrodes

• DOI: 10.1021/jasms.3c00311
• Publication Date: 2023-11-05T13:06:40Z
• Authors: Hamish Stewart; Dmitry Grinfeld; Alexander Wagner; Alexander Kholomeev; Matthias Biel; Anastassios Giann...; Alexander Makarov; Christian Hock
• Keywords: Duty cycle; Ion trapping; Pulsed DC; Trap (plumbing)

Ion traps are routinely directly coupled to mass analyzers, where they serve suitably cool and shape an ion population prior pulsed extraction into the analyzer proper. Such devices benefit from high duty cycle transmission but suffer slow processing times caused by a compromise in buffer gas pressure range that dampens kinetic energy without causing excessive scatter during or within analyzer. A rectilinear RF quadrupole trap has been characterized, conjoining pressurized collision region with pumped region, unbroken interface for seamless transfer between them. Auxiliary electrodes mounted provide DC voltage gradients both guide ions through device position them at slot. The influence of auxiliary upon trapping field was measured, suitable parameters were defined. mode operation developed allowed parallel regions, enabling repetition rate 200 Hz when high-resolution accurate-mass