Table 2. Summary of simulations carried out to examine the performances of the new scheme in comparison with the original scheme.

			Profile plot		Peak power
Simulation condition			e−	XFEL	Main (TW)	Satellite (%)	Pulse length (as)
Original scheme			2(a)	(i)	0.61 ± 0.41	8.5 ± 6.5	84 ± 14
1.5-Cycle pulse	Linear taper		5(a)	(ii)	0.83 ± 0.47	14 ± 14	74 ± 9.0
	Well-type	N b = 1	NA	NA	1.5 ± 0.56	0.66 ± 0.47	66 ± 3.0
		N b = 3	5(b)	(iii)	1.4 ± 0.49	0.27 ± 0.35	69 ± 2.3
		N b = 5	NA	NA	1.4 ± 0.35	1.1 ± 0.89	68 ± 2.5
Double-chirped pulse			5(c)	(iv)	1.8 ± 0.45	0.20 ± 0.16	62 ± 3.0
Pulse stacking	N s = 18		9(c)	NA	1.6 ± 0.36	30 ± 9.1	62 ± 1.5
	N s = 9		9(d)	(v)	1.3 ± 0.45	6.1 ± 4.8	59 ± 3.5