Table 1.

Comparison of photon fluxes in the soft X-ray in existing beamlines using HHG driven by few-cycle SWIR pulses.

Condition	Photons/s in 1% BW at 300 eV	Photons/s in 10% BW at 300 eV	Photons/s in 1% BW at 200 eV
1400 nm, 4 mm cell	3.4 × 104	3.3 × 105	1.18 × 106
1300 nm, 4 mm cell	3.4 × 104	3.6 × 105	6.4 × 106
1300 nm, 1 mm cell	2.5 × 104	2.7 × 105	2.0 × 106
1300 nm, semi-infinite 7.5 cm cell	2.5 × 105	2.4 × 106	1.2 × 107
1300 nm, semi-infinite, optimal	1.4 × 106	1.3 × 107	4.5 × 107
1850 nm, 12 fs in Ne23		2.8 ± 0.1 × 107
1850 nm, 12 fs in He23		1.8 ± 0.1 × 106
1800 nm, 12 fs in Ne24	3.0 ± 0.8 × 106
1800 nm, 12 fs in He24	1.6 ± 0.4 × 105