VISRAD Incident Flux Files

VISRAD is a 3-D view factor code used to design experiments at OMEGA, Z, and NIF. VISRAD includes a CAD capability for setting up targets and pointing lasers, and is used to compute the radiation environment throughout 3-D target systems. For any given surface element in the its grid, VISRAD can write a file providing the time- and frequency-dependent spectrum onto that element.

HELIOS has the capability to use these VISRAD incident flux files to specify an external radiation source. To specify the VISRAD file to be used as an external radiation source, set the Radiation Source setup widget.

Contents of the file include the selected object and surface element index, and for each simulation time:

• simulation time
• total frequency-integrated flux
• equivalent drive (blackbody) temperature
• frequency-dependent flux onto the surface element

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