Figure 1

Dose distribution of electrons in SMFs. Dose distributions along the x-axis (A) and y-axis (B) for 10-MeV incident electrons in the positive y-axis direction parallel to the SMF calculated by EGS. The distributions along the x-axis (C) and z-axis (D) for 1-MeV incident electrons in the positive z-axis direction perpendicular to the SMF calculated by EGS. We confirmed that the distributions calculated by etsmode were in good agreement with those by EGS as shown in supplementary data (Fig. S2). The distributions for 10-MeV and 1-MeV electrons were significantly affected by the SMFs.