Table 4. Correction factor, n _{E th} , to apply to the fluence threshold calculation ( Equation 11) when irradiating with truncated beam by a circular aperture.

The values are represented graphically on Figure 3(b).

η E th		Aperture power transfer ( P T )
		90%	75%	60%	40%	25%
Maximum considered energy	1.5·Eth	1.002	1.002	1.002	1.002	1.002
	2·Eth	1.005	1.006	1.006	1.007	1.007
	2.5·Eth	1.010	1.011	1.011	1.012	1.012
	3·Eth	1.014	1.016	1.016	1.017	1.017
	3.5·Eth	1.018	1.020	1.021	1.022	1.024
	4·Eth	1.022	1.026	1.027	1.028	1.029
	4.5·Eth	1.028	1.031	1.032	1.033	1.034
	5·Eth	1.032	1.035	1.037	1.038	1.040