Table 1.

Electron beam characteristics from the measured PDD curve, app 10, SSD = 100 cm.

Parameter	6 MeV	8 MeV	10 MeV	15 MeV
Mean energy (MeV)	6.01	7.86	9.63	15.22
Ep0 (MeV)	6.68	8.62	10.38	16.19
R100 (mm)	15.00	18	21	28
R90 (mm)	19.19	25.41	31.33	48.56
R50 (mm)	25.78	33.74	41.33	79.85
Rt (mm)	20.36	26.72	33.21	51.89
Rp (mm)	32.48	42.19	50.96	42.44
Zref.(cm)	1.4	1.9	2.4	3.8
KQ	0.934	0.927	0.920	0.9