Table of Contents
Advertisement
5. The ion beam is focused in an ion guide before it enters the quadrupole, where the ions
are filtered according to their mass-to-charge ratio.
6. The mass-separated ions pass through a collision cell where they can undergo collision-
induced dissociation (CID).
7. The ions pass through a hexapole ion guide before entering the XS ion optics, where they
are collisionally cooled and focused.
8. The ions pass into the time-of-flight (Tof) analyzer. A high voltage pulse orthogonally
accelerates the ions up the flight tube where a reflectron reflects them back toward the
detector. Ions of different mass-to-charge ratios arrive at the detector at different times.
The difference in the arrival times provides the basis for a mass spectrum.
9. The signal from the detector is amplified, digitized, and transmitted to the software.
Figure 1–5: Ion optics overview
Detector
To vacuum pump
Pusher
Hexapole ion guide
To vacuum pumps
To vacuum pumps
To vacuum pump
March 17, 2021, 715005046 Ver. 03
Page 26
Advertisement
Table of Contents
