To use PASSKEy, one has to upload in this website (Codegen link) the input files (BOLSIG+ outputs, PASSKEy.inp and coefficients.input) and your email address. By pressing the “Send” button, an email with a link of the generated code will be sent to your mailbox. The user has to briefly modify the user defined codes, compile them and run (better on a HPC). The procedures can be concluded as follows:

• BOLSIG+ output (generated by the BOLSIG+ package).
• PASSKEy.inp (the definition of physical conditions and chemistry)
• Coefficients.input (the configuration of the grids and numerical schemes)
• Voltage.input (the voltage profile data)
• Please use the online codegen (Codegen link) to generate necessary codes for compilation. The link of the code for download will then be sent to your mailbox.

• Udf_main.f90 (define the output)
• Udf_geometry.f90 (define the geometry)
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• An Intel fortran compiler (ifort with MKL) is required.
• The codes for compilation consists: udf_XX.f90, auto_XX.f90, and some .mod files. A batch file for ifort compilation is provided in the package.
• Run the case with the generated executable and predefined input files.

• The Tecplot software is recommended for postprocessing.