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Full-Text Articles in Physical Sciences and Mathematics
Miniaturization Of Linear Ion Traps And Ion Motion Study In A Toroidal Ion Trap Mass Analyzer, Ailin Li
Miniaturization Of Linear Ion Traps And Ion Motion Study In A Toroidal Ion Trap Mass Analyzer, Ailin Li
Theses and Dissertations
I describe the miniaturization of a linear-type ion trap mass spectrometer for possible applications in portable chemical analysis, and demonstrate the advantages of using lithographically patterned electrode plates in realizing an ion trap with dimension r0 less than 1 mm. The focus of the work was to demonstrate the viability and feasibility of the patterned electrode approach to trap miniaturization, and also to discover potential obstacles to its use. Planar ceramic substrates were patterned with metal electrodes using photolithography. Plates that were originally used in a linear trap with a half-spacing (r0) of 2.19 mm were positioned …
Ion Trap Miniaturization Considerations: Space-Charge Effects In Cylindrical Ion Traps And Misalignment Effects In A Two-Plate Linear Ion Trap, Yuan Tian
Theses and Dissertations
Portable mass spectrometers provide convenience for applications where conventional mass spectrometers are not suitable. However, a series of miniaturization issues show up in small mass spectrometers, specifically mass analyzers, that need to be thoroughly addressed before further miniaturization. The work in this dissertation focuses on miniaturization issues of ion trap mass analyzers. Space-charge is one of the major issues in small ion traps affecting their analytical performance. It limits ion trapping capacity when ion-ion repulsion causes spreading of a packet of ions. Simulation studies on the relationship between different trap dimensions and trapping capacity was done on a geometry-optimized cylindrical …