Tungsten ion source under double-pulse laser ablation system
Khalil Ahmed Asaad I1, †, Hafez Ashraf I2, Elgohary Mahmoud E3, 4, Morsy Mohamed A5
       

(color online) Variations of signal intensity of different atomic W spectral lines (W(I) 522.46 nm, W(I) 525.53 nm, W(I) 526.85 nm, W(I) 549.62 nm, W(I) 551.47 nm, W(I) 644.51 nm) with laser pulse energy ratio The inter-pulse delay between the two laser pulses is Δt = 250 ns and the total energy remains the same in all the cases.