Simulation of Ni-like and Co-like X-rays emitted from laser produced tin plasmas

Abstract

The Ni-like and Co-like X-rays emitted from laser produced Tin plasmas generated using the 1.06 µm, 1.2 ns pulses from a Nd:YAG laser were modelled. The modelling includes the Ni-like and Co-like X-ray resonance line spectrum emitted from Sn plasma between 12Å -25Å and also free-free and free-bound continuous spectrum emitted from the Zn-, Cu-, Ni-, Co-and Fe-like ions between 1Å and 30Å. Then, X-ray conversion efficiencies were calculated using these spectra. Maximum X-ray conversion efficiency was obtained 3.54 % at power density of 5 × 10 12 W cm −2 into 2π steradian. X-ray pulse durations were calculated spectrally integrated total X-ray emission of the Ni-like and Co-like from Sn plasmas.

Characterization of X-ray emission from laser generated plasma

“…For low intensity laser, graph placed in the top of Fig. 7, were taken in consideration data from literature [10], in which the conversion efficiency was investigated as a function of the laser pulse duration, using a Nd:YAG laser with an intensity of 10 13 Wcm -2 , focalized on a bulk Sn target. The photon emission increases with the pulse duration, because electron can interact for longer times with the laser pulse, gaining more energy.…”

Modelling of electronegative collisional warm plasma for plasma-surface interaction process

“…Many researchers have observed noteworthy influence on the characteristics of the probe in the cases of low-frequency sheath processes [33][34][35]. X-ray emission has also been observed, when the laser light is launched on tin slab forming a sheath of ions that radiate [36][37][38]. Langmuir probe analysis permits to measure the behaviour of plasma parameters in distinctive plasma systems [39].…”