What emitter models does the Opera Charged Particle module offer?
• Thermionic - Thermal saturation - Space-charge limited emission - Langmuir/Fry
• Field effect
• Plasma free surface
• Surface secondary emission (backscattered and true secondary)
• Volume interactions (backscatter, ionisation)
• Magnetized plasma
• User defined emitter
What does Opera display in terms of ion beam statistics?
Why are charged particle solutions iterative?
Can Opera model Magnetron Sputtering?
What is meant by Secondary Emission?
Can Opera calculate the temperature rise due to the impact of kinetic charged particles onto a surface?
For analysis of a conventional space charge limited, tungsten cathode, triode gun, which do you suggest is most appropriate emission model?
Has Opera been benchmarked for NDT type of problems?
How do you minimise mesh discretisation errors in NDT problems?
In an accelerator magnet, magnetic fields are used to steer and focus charged particle beams. What tools does Opera have to rapidly assess field quality? And can I see how the particle beams behave?
• 3D track lines through the geometry
• projections onto the major coordinate planes
• intersection points on any 2d plane
• current or power density maps
Can Opera model pulsed magnets, especially the redistribution of currents in the conductors? And how does it deal with laminations?
What physics can Opera capture in the superconducting windings of my magnet?
How accurate is Opera for simulating NMR/MRI magnets?
I’m designing superconducting solenoid MRI magnets and need to assess the small effect of the shielded room and the steel reinforcing on the magnet’s homogeneity?
Can I assess how effective the shielding is for my proposed MRI facility?
How does Opera-3d represent permanent magnets?
The 2nd quadrant curve can be extended into the third quadrant to determine the risk of demagnetization in any element. For example, in a hybrid wiggler or similar, it is important to assess the likelihood of demagnetizing the PM’s when the wound poles are energized. However, this simulation will only inform the user of which elements (parts of the PM) have entered the 3rd quadrant – it will not show the effect of the demagnetization after, say, the wound poles are de-energized.
The same material model is also available in the transient electromagnetic simulation.
To assess behaviour after a PM has been partly demagnetized and the external demagnetizing field is removed, it is necessary to use the more advanced model for PM materials available with the Demagnetization module (DEMAG license). DEMAG can operate as a stand-alone transient electromagnetic simulation or be used in conjunction with any of Opera-3d’s time-stepping transient electromagnetic solutions, including the rotational and linear motion simulations with rigid body electromechanical dynamics. The DEMAG PM model not only includes the demagnetization 2nd and 3rd quadrant curves but also allows for the recoil of the magnetization. The recoil will be along the reversible magnetization line with each finite element storing the amount of irreversible magnetization locally that has been lost during demagnetization.
If the user is considering magnetizing their own PM materials rather than using a pre-magnetized magnet from one of the manufacturers, the DEMAG simulation also allows the fixture for magnetizing to be designed. The DEMAG simulation shows both the level of magnetization achieved in each element of the PM material and the direction of the magnetization. This distribution of magnetization (magnitude and direction) can then be inserted into an application model where the magnet is being used. This gives the user the ability to assess whether the magnetization distribution obtained with the current design of fixture is adequate for their requirements.
Can I calculate a Torque-Speed curve for my Synchronous Reluctance Machine?
Can you display a Gorges Diagram for my electrical machine?
Can Opera analyse my electrical machine under fault conditions?
How do I account for demagnetization of my permanent magnets in my electrical machine?
Can I look at magnetization of my permanent magnets before they are assembled into my electrical machine?
Can Opera calculate the losses in my machine?
Copper losses can be calculated simply from the current flowing in simulated windings.
Hysteresis losses including rotational component losses can be explicitly obtained using the hysteresis solver and eddy current losses by explicitly defining the materials’ conductivities.
Any loss quantity can be used as a heat source in thermal analyses.
Can you consider both Electromagnetic and Structural performance of a Synchronous Reluctance (SynchRel) Machine at the same time, or do I not need to?
Can Opera model Superconducting Generators; do you have any experience in this field?
Normal operation is one thing, how about performance under fault conditions?
Can Opera analyse a transformer under open-circuit, short-circuit and inrush conditions?
Can Opera use my full hysteresis curve for my soft magnetic material?
Which variables can I use in an Opera Optimization process?