Material Parameters: default - SEE Furman True

Modeling: MaterialsNew/EditNew MaterialParticle Emission PropertiesTrue Sec.

Description of the dialog box's model parameters

Energy, equals

The secondary electron yield δts has its maximum at the dialog box parameter Energy for normal incident primary electrons.
If an electron hits the surface with an angle of θ0, the secondary electron yield δts will have its maximum at:

SEY, equals

The maximum for the secondary electron yield δts equals the dialog box parameter SEY for normal incident primary electrons.
If an electron hits the surface with an angle of θ0, the maximum of the secondary electron yield δts is:

The dialog box parameter s changes the increase and decrease of the secondary electron yield δts, but the maximum of δts is not dependent of s .

Advanced: Model for true secondary electrons

The probability distribution function (PDF) for the true secondary electrons can be written as follows:

Here, P is the normalized incomplete gamma function. The parameters pn and εn are coupled to the material you choose in the material dialog tab and can also be changed by the user.
To avoid the problem that some probabilities can become negative, a modified secondary electron yield is defined:

In our secondary emission model the probability for the true secondary electrons is a binomial distribution, where M is the maximum number of secondary electrons per incident electron and: