1. Click right button at source icon, and select Edit.
2. Select "Replace A Piece" in Menu Items, and click Go.
3. Choose "Create custom pattern", and click Next.
4. Then the following window is shown.
Fig. 1.
1. Select SuperGaus, and input 1 in LargeNum X. This means source is Gaussian.
2. Click Gaussian Beam Width Calculator, then the following is shown.
Fig.
2.
3. Sigma is value of
HW 1/e for Gaussian Amplitude. Input proper value.
4. Rim Radius is the half of source width. Input proper value.
5. Click Calc, and repeat above procedure changing sigma until FW 1/e^2 of Amplitude Squared is same as Rim diameter(source width).
Fig. 3.
6. Put this FWHM value for Amplitude into FWHM X in Fig. 1.
