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Image of the electromagnetostatic ECD cell (circled in yellow) installed in a Q Exactive HF mass spectrometer with the C-trap removed (top panel). Schematic (bottom panel) of the electromagnetostatic ECD cell with simulated magnetic vector potential and electron trajectories in yellow along the axis of the cell. Calculations were performed with LORENTZ-EM (Integrated Engineering Software, Winnipeg, Manitoba, Canada).
