Latest release: Opera 19
Improvements in Opera-3d Multiphysics to enable analysis of a wider range of problems
Significant improvements to the Charged Particle solver, particularly for modelling magnetron sputtering devices
A faster Direct Sparse Solver for some of the scalar potential solvers in Opera-3d
Many other minor changes have been made throughout the software to enhance its functionality and
reliability. To find out more about the benefits of this latest release, see below:
In Opera-3d version 19 it is possible to use quadratic (second order) elements in multiphysics runs. This has been made feasible by enabling the edge potential solvers, e.g. Transient Electromagnetics, to handle a mesh with midside nodes. These additional nodes are used in subsequent solver stages. The benefit of this enhancement is that stress solutions can produce much more accurate results with second order elements.
In the Opera-3d Modeller, quadratic elements can be applied to individual cells, faces or edges as the model is being constructed, or applied to the whole model when creating the database. The option to use these settings is now available for multiphysics models that contain several connected solution stages.
RF Cavity Design
For RF cavity design, it is useful to see how the cavity deformation from thermal induced stresses affects the cavity resonant frequency. This has been made much easier in Opera-3d version 19 by enabling the Modal High Frequency solver to pass forward the solution eigenfrequency to the next stage of a multiphysics solution.
Piezo – Electrostatic Forces
In previous versions of Opera-3d, only the magnetic forces were calculated and passed forwards in multiphysics solutions. In Opera 19 the electrostatic forces can also be used, which allows the deformation of a Piezo crystal to be calculated from the electric field generated by an applied voltage.
Charged Particle Solver
Significant enhancements have been made in Opera-3d version 19 to enable a broader range of charged particle models to be analysed and in making these analyses faster and even more accurate.
Unlimited Number of Tracks
With the increase in computing power and improved multithreading (see below) for particle tracking the number of tracks that a model can calculate has been increasing. In order to support this the existing limit of 100,000 tracks has been removed. In Opera 19 the only limit on tracks during a solution is the amount of memory available to store the tracks as they are being computed.
Enhanced User Defined Emitter
Additional system variables are available for use in defining emission regimes. This allows the user to create modifications to the standard emission strategies. Examples of how to define the standard Child’s law emitter and the Plasma Free Surface emitter, both with and without directed drift, are given.
Maxwell Random Emitter
In order to give improved accuracy, the default number of velocity bins has been increased.
Parallel Solution Speed
For users with Multicore licensing improvements in the way the solver computes tracks and in the way multithreading is handled has resulted in significant improvements in tracking accuracy and parallel tracking speedup.
- Beamlet collision dynamics
- Electron scattering in the plasma volume
- Neutral scattering
- Continuous energy loss/ionization
- Improved charge balance computation
- Adaptive DC sheath
- Electron Bohm diffusion
- Electron recapture/reflection
- Neutral re-deposition
An example model and the files required to configure the layered emitter configuration is included in the Opera 19 installation.
A new solver technology, Direct Sparse Solver (DSS), is now available for a number of the solver modules in Opera-3d. This has the advantage of improved solver times for a number of model configurations as well as offering improved parallel (multi-threaded) solver speed up over the existing iterative solvers.