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Schematic of (A) the multilevel SLIM module, ion levels (B) one, (C) two and four, (D) three, and (E) a side view of the ion escalator. The coloring scheme in B–E is as follows: (gray trace) in-SLIM ion accumulation, (blue trace) ion separation, (red bar) ion switches, (green trace) ion escalator, (yellow circle w/black center) ion escalator orifice, (pink bar) ion escalator landing.
