Figure 8: Variation of electric field magnitude in the solution volume. energy density in the vacuum region. Press Analysis/Volume integral . EStat offers to open a data record file with the default name ElectronDiode.DAT . Global information will appear on the screen, but we need to check the file for a detailed breakdown by regions. Press File/Close data record and then File/Edit files . Open ElectronDiode.DAT . Here is the information of interest: Quantity: Energy Global integral:
6.358995E+01 RegNo Integral ========================== 1 5.534785E+00 2 5.602793E+01 3 2.027232E+00 4 4.472539E-29 The capacitance of the vacuum volume (Region 1) may be determined from the equation U e = CV 2 / 2 as (2)(5 . 5347 / (5 . 0 Ч 10 5 ) 2 = 44 . 3 pF. We have completed the first electrostatic solution. An inspection of the final state of the data folder shows two features of Field Precision programs: The compact input files ElectronDiode.MIN and ElectronDiode.EIN contain complete information to reconstruct the solution. All the data that we generated has been recorded in accessible files.
For example, if you archive the file ElectronDiode.EOU , you can always return for additional analyses. 12