A new linear ion trap with simple electrodes

Linear ion traps exhibit greater space charge capacity compared to conventional 3D Paul traps. Commercial ion traps are made of electrodes of hyperbolic shape. The present work investigates the possibilities of designing linear ion traps from simple electrodes, which are relatively cheap and handy for manufacturing and, at the same time, are comparable to commercial ion traps in resolving power of mass analysis. Using computer simulations and optimization of resonance ejection scan, it is shown linear ion traps can be made of electrodes of triangular cross-section with an ejection slit width of 16% of the trap inradius; the resolving power of the mass spectrum is more than 18000.