ION EMISSION DYNAMICS IN ULTRAFAST LASER

laser ablation dynamics due to its wide application in the fields of micromachining, laser surgery, surface smoothing, nanoparticle production etc. I,2 Compared to long-pulse nanosecond (ns) laser ablation, the thermal processes are less pronounced in plasmas produced by femtosecond (fs) ultrafast lasers. Ultrafast lasers are better suited for micromachining, pulsed laser deposition and various other applications. Ultra­ intense laser produced plasmas can also be used for producing collimated proton, electron and neutron beams. Moreover, the laser plasmas provide intense ion beams with a high charge state, the so called laser ion source (LIS). However, the lack of control of the ion pulse from laser-produced plasmas limits its applications and further studies are necessary to improve basic understanding of ion emission dynamics from laser-produced plasmas. We investigated the dynamics of ion emission from ultrafast laser ablated plasmas in vacuum from metal targets. The angular features of ion emission features are studied for ultrafast laser ablation and compared with ion emission