Circular arrays of polymer-based miniature rectilinear ion traps

摘要

The design and operation of an annular array of parallel, miniature rectilinear ion traps (RITs) isndiscussed. Stereolithography apparatus (SLA), a previously validated method for ion trap fabrication,nwas applied here to construct an array of mass analyzers and their mounting hardware. Two versions ofnthe array were tested, using either six or twelve stretched RITs (x0 ?1.66 mm, y0 ?1.33 mm, z ?16.66nmm) mounted in parallel about the circumference of a circle with the interior and exterior x-electrodenplanes oriented tangential to the inner and outer annulus rings, respectively. The arrangement of the ionntraps is such that the ions are radially ejected just above the throat of a centrally located electronnmultiplier detector into which they are accelerated. The mass analyzer array was mounted in a customnvacuum manifold. The resolution, mass-to-charge ratio (m/z) range, and MS/MS capabilities werentested using electrospray ionization (ESI). The devices were tested in two configurations: (i) separatenion sources for each trap, and (ii) a single ion source for the entire array.