Particles and Current

1. Locate the Particles option and choose between Add GEO Electron or Particle Source.

   

    

2. An properties menu will appear along with the Particle Source within the structure tree.

   

    

3. The following tables contain information on the possible parameters for General, Geometry Options, and Energy Spectrum. What is included in each subsection is determined by the Particle Type and Spectrum Type. The Particle Type can change the parameters in General, while Spectrum Type changes the parameters in Energy Spectrum. To see a full list of options for each access the drop down menu in the properties interface.

    

4. General

   Entry	Meaning
   Number of Particles	Enter the number of particles used per time step used for the Particle Tracking feature
   Number of Time Steps	The number of time steps the source will be active, with the time step length defined in the Domain
   Atomic Number	Set the atomic number for the Ion particle source
   Nucleon Number	Set the nucleon number for the Ion particle source
   Charge [e]	Set the charge value for the Ion particle source
   Nuclear Excitation [MeV]	Set the nuclear excitation for the Ion particle source

    

5. Geometry Options

   Source Geometry	Parameters
   Boxed	Allowing for mono or bi-directionality along X, Y or Z axis: + X, Y, Z- True enables flux in direction, False disables - X, Y, Z- True enables flux in direction, False disables
   Cylindrical	Plane- Select the plane the source will be normal to: Divisions- set the number of divisions to use for the cylindrical source
   Spherical	Incidence Type- Select either focused or Isotropic: Isotropic- Particles travel in all directions Focused- Particles travel radially towards origin
   Planar	Plane- Select the plane the source will be normal to Direction- select either the + or - direction in the plane axis chosen
   Charge Density	Set the Ion charge density

    

6. Energy Spectrum

   Entry	Meaning
   Spectrum	Import spectrum file
   Current [A/m2]	Set the current that will be used for a single time step in the spectrum file
   Energy Spectrum	Set energy levels and the corrisponding fluence
   Integral Flux Time [s]	Time adjustment made to the manual entry of energy bins
   Spectrum Energy [MeV]	Set the energy that will be used for a single time step in the spectrum file
   Satellite Name	Satellite to be imported from SKT
   SKT Particle Source	Generate Particle Source from SKT data
   In Sync	Has particle source been synced with SKT

    

EMA3D Charge allows setting electric or magnetic current distributed across geometry as an excitation source. The locations of the current sources are specified by identifying geometry or nodes where the source is to be applied, with additional data provided to specify the source characteristics.

1. Click Current within the Excitation panel under the EMA3D Charge tab in the Ribbon.

   

2. Adjust the properties of the current source in the properties panel. The list of adjustable properties and their definitions are provided in the table at the end of this page.

   

3. Click on the appropriate selection tool (i.e., surface , line , or point body ,) in the top left of the model window to restrict the current source assignment definition.

4. Click on the geometric entity to be excited. It will be highlighted. Note that the geometric entity used for the source should not have a material definition assigned to it.

   

5. Click OK to complete the current source setup.

6. The excited geometry will be recolored in the model window (users may need to click elsewhere in the model window to remove the highlighting). Additionally, for a line source, the flow direction of the current will be denoted by gray arrows on the excited geometry.

   

7. The current source will be added to the Simulation Tree under the Sources node as Current Source. The yellow warning label attached to it indicates that the source needs a signal attached to it.

   

8. Instructions on adding signals can be found here.

   

9. To edit the current source at any time, right click Current Source at any time in the Simulation Tree.

   
10. Current Source Properties

    Entry	Meaning
    Reverse current direction	The current flow direction is prescribed automatically depending on the direction in which the geometry was drawn. The flow direction for a line will appear as gray arrows overlaid on the source geometry after clicking the OK button. To reverse the direction change False to True
    Current Type	The type of current, Electric or Magnetic, to be applied to the selected geometry
    Color	The rendered color of the source in the model

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