Crossed Field Velocity Selectors


Applications of Crossed Field Velocity Selectors

Crossed field velocity selectors provide mass and charge analysis. They can be used in high potential terminals and for analysis of exterior ion source beams.


Mass Analysis

For a fixed energy, the velocities of the different mass components are different, and only the selected mass passes undeflected.

Charge Analysis

With a beam of several charge states accelerated through a fixed potential, the velocity selector may be used to select a certain charge state.



Velocity Selector Design & Options



NEC offers four velocity selector options. Below are brief descriptions.

Model VS5-502
  • Mass-analyzes beam in the high potential terminal of an accelerator prior to acceleration
  • Magnetic field of 1200 Gauss (fixed)
Model VS5-504
Model VS5-506
  • Compact version of the VS5-504
  • Magnetic field of 2300 Gauss (fixed)
Model VS5-508
  • Compact version of the VS5-502
  • Magnetic field of 3300 Gauss (fixed)



Related Documents
Specifications for Crossed Field Velocity Selectors