Material Parameters: default - Secondary Electron Emission

Modeling: MaterialsNew/EditNew MaterialParticle Emission Properties

Edit Object Properties(navigation tree: Materials:material1PropertiesParticle Emission Properties)

This is a dialog page of the Material Parameters dialog box. On this dialog page the secondary electron emission parameters can be defined.

 

Note

  1. Predefined materials with secondary emission properties can be loaded from the material library. Their names start always with SEE like e.g. SEE-Alodine.
     

  2. If you switch on the a emission the first time for a new or another material, the steel emission parameters are set as default. The secondary electron yield and the probability distribution functions are shown in the 1D result folder Materials.
     

  3. Some particle-wall-interaction information (number of hits per solid, charge, energy, etc.) can be obtained from the collision information file in the navigation tree or by use of the 0D result template "Get Double Result Value".
     

  4. The different secondary electron emission models are discussed on the following overview side: Secondary Electron Emission Overview.

 

General options

Emission model

Select the emission model that should be used. Available models are Furman, Vaughan and Import. To switch the secondary emission off, choose None.

Edit...

In case of Vaughan and Import a this button appears. Click on it to define the emission model parameters.

Material Parameters: default - SEE Import

Material Parameters: default - SEE Vaughan

True..., Elastic..., Redif...

In case of Furman these three buttons appear. Click on them to define the emission model parameters.

Material Parameters: default - SEE Furman True

Material Parameters: default - SEE Furman Elastic

Material Parameters: default - SEE Furman Rediffused

 

Visualization options

This options are only for visualization purposes and do not affect the simulation.

Show 1D plot

Select, if you would like to visualize the secondary electron yield SEY or the probability distribution function PDF for the energy.

Incident angle

Enter the incident angle for the incident electrons. This value can affect the SEY and the PDF plot. A value of 0 means normal incident.

Incident energy PDF

Enter the incident energy for the incident electron. Only for the PDF plot.

Incident energy SEY

Enter the energy range for the SEY plot. The PDF plot will not be affected.

 

Annotation

In former CST STUDIO SUITE versions, some additional settings were available by this dialog box. Since these settings normally should not be modified, they were removed from the dialog box. But using VBA commands these settings can still be changed.

If a message occurs, that the number of generations is limited due to backward compatibility, have a look here.

Max. secondaries per hit

A change of the default setting is not recommended!

Enter the maximum number of secondary electrons, which can be emitted per incident electron. This setting affects only the Furman emission model. The default is set to 10 (the maximum). Use the VBA command SeMaxSecondaries within the material definition to modify the default. The whole command could look like this: .SeMaxSecondaries "10".

Max. generations

A change of the default setting is not recommended!

Enter the maximum number of generations which a (primary) source electron can produce. he default is set to infinity. Use the VBA command SeMaxGenerations within the material definition to modify the default. The whole command could look like this: .SeMaxGenerations "1000".

 

See also

Secondary Electron Emission Overview

Material Parameters: default - Secondary Electron Emission

Material Parameters: default - SEE Import

Material Parameters: default - SEE Vaughan

Material Parameters: default - SEE Furman True

Material Parameters: default - SEE Furman Elastic

Material Parameters: default - SEE Furman Rediffused

 

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