AFM observation of titanium surface irradiated with an intense pulsed ion beam

Summary form only given. Metal surface characterization by irradiation of an intense pulsed ion beam (IPIB) has been studied experimentally and numerically. The IPIB irradiation to metals leads to rapid heating of the surface which is immediately followed by rapid cooling and resolidification, resulting in metal surface modification. The authors focus on the reduction of machining roughness on a titanium surface. The experiments were performed with the pulse power generator "HARIMA-II" (400kV, 3/spl Omega/, 50 ns) at the Himeji Institute of Technology. The IPIB was produced with an inverse pinch ion diode that consists of a ring anode of 50 mm in diameters and annular cathode projected from a circular plate of 16 mm in diameter. A 2-mm thick acrylic plate was attached to the anode surface as an ion source. The anode-cathode gap length was 3 mm. A diode chamber was exhausted by an oil diffusion pump to <1/spl times/10/sup -3/ Pa. The maximum energy and pulse width of IPIB were 200 keV and 70 ns (FWHM), respectively. The typical current density of IPIB was 0.5 kA/cm/sup 2/ at the focal point of 120 mm behind the anode. The main component of the ion beam was hydrogen.