4
Ion Transmission and Mass Analysis
Ion Optics
30 Orbitrap Fusion Series Hardware Manual Thermo Scientific
The ion optics focus and accelerate the gas-phase sample ions into the designated mass
analyzer, where they are isolated and ejected according to their mass-to-charge ratios. This
section describes the following:
• MP00 Ion Optics
• MP0 Ion Optics
• MP1 Ion Optics
• Curved Linear Trap
• Ion-Routing Multipole
• MP3 Ion Optics
• DC Offset Voltages
MP00 Ion Optics
Ions pass through the exit lens and move toward the MP00 ion optics, which are located
between the API source interface and the MP0 ion optics. The MP00 ion optics include the
MP00 RF lens and the L0 lens. See Figure 13 for the location of these components.
For the Orbitrap Fusion MS, the square-metal elements of the MP00 RF lens act as an
ion-focusing device (first image in Figure 14). For the Orbitrap Fusion Lumos MS, the MP00
RF lens is an array of four cylindrical metal elements (second image in Figure 14). The mass
spectrometer applies an RF voltage to the elements, generating an electric field that guides the
ions along the axis of the lens.
Figure 14. MP00 RF lens (Orbitrap Fusion and Orbitrap Fusion Lumos MSs)
Orbitrap Fusion MS Orbitrap Fusion Lumos MS
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