Principle Of Operation - Thermo Scientific Prima PRO User Manual

Technical Description: System

Principle of Operation

Principle of
Operation
B-2 Prima PRO & Sentinel PRO Mass Spectrometers User Guide
RMS valve
Inlet probe
Inlet controller
Source assembly
Vacuum housing
Turbo molecular pump
Figure B–1. Hardware components
Sample gas is ionised by electron impact in the source. Ions injected
into a magnetic field will describe a circular orbit where the radius is
dependent on the initial velocity of the ion, its mass, charge and the
strength of the magnetic field.
This relationship is described in Equation 1:
Where:
R = radius of orbit
M = mass of the particle
V = voltage applied to the particle to accelerate it to velocity 'v'
H = magnetic field
z = charge on the ion
MV x constant

2
R
2
H z
Equation 1.
Thermo Fisher Scientific
Magnet control
Electromagnet
Vacuum gauge
Amplifier & detectors
A/C unit
AC power distribution
DC power distribution
Analyser supplies
Embedded controller
Digital & serial I/O