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Charged Particle Optics

Charged Particle Optics Software (CPO) is a high-end software application which calculates electrostatic/magnetic fields and the trajectories of charged particles through those fields.

Charged Particle Optics Software (CPO) provides accurate calculations of space charge and space-charge limited cathode emissions, highly accurate field calculations via the Boundary Element Method (BEM), a vast number of examples, and various added benefits such as direct calculation of aberration coefficients, dielectrics, magnetic fields from wire currents, and built-in autofocusing routines.

  • Extremely accurate BEM methods proven with over 200 benchmark and other tests. See examples and publications.
  • Help system that is exceptionally clear, comprehensive and supported with examples
  • Developed continuously since 1974 by one of the leading research group in electrostatic systems (University of Manchester, UK).
  • Vast range of capabilities and options, with advanced underlying algorithms, all at a competitive price for a high-end package.

See the Simion-CPO site for more information.




Capabilities:

Electrostatic field solving is done to high accuracy using the Boundary Element Method (BEM) rather than traditional FEM or FDM methods. The BEM has unique advantages and suits well to space-charge, cathode problems and also to nano-structures in the presence of large electrodes. Adaptive surface meshes get smaller where accuracy is critical. The BEM even easily simulates fine meshes and non-enclosed systems. It also may simulate low-frequency oscillations, such as in a quadrupole.

CPO can calculate Particle trajectories of charged particles (Bulirsch-Stoer), accurately accounting for space-charge and relativistic effects. Space-charge is handled with iterative convergence tube and mesh methods–accuracy of 1% against theoretical results have been obtained.

CPO can simulate Cathode emissions limited by space charge, including thermionic, field and extended Schottky emissions. Supports Child’s Law/Langmuir, Fowler-Nordheim and Richardson-Dushman relationships, plus user-defined properties. CPO specially handles space-charge effects at the critical cathode region.

CPO can generate Secondary emissions when a particle hits an electrode. The user chooses the current multiplication factor and energy/angular distributions of the secondaries.

The examples included in the scattering version of CPO show particle scattering and losses due to grid, background gas or secondary emissions. Particle-particle scattering inside the beam is possible with the stochastic version. You can write user-defined routines in C++.

Magnetic countour lines on a solenoid coilcolor magnetic field map on a solenoid coil Magnetic elements of various types such as solenoids, wire loops and user-defined fields are available. The software can also display various contour and field plots.

Aberration coefficients and lens properties can be calculated directly. An iterative automatic focusing option can find optimum electrode voltages.


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