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Enhanced He-alpha emission from "smoked" Ti targets irradiated with 400nm, 45 fs laser pulses

By F.Y. Khattak, R.J. Clarke, E.J. Divall, M. Edwards, P.S. Foster, C.J. Hooker, A.J. Langley, O.A.M.B. du Sert Percie, C. Spindloe, G. Tallents, D. Riley, P. Mistry, D. Neely, J. Smith and M. Tolley

Abstract

We present a study of He-like 1s(2)-1s2p line emission from solid and low-density Ti targets under similar or equal to 45 fs laser pulse irradiation with a frequency doubled Ti: Sapphire laser. By varying the beam spot, the intensity on target was varied from 10(15) W/cm(2) to 10(19) W/cm(2). At best focus, low density "smoked" Ti targets yield similar to 20 times more He-alpha than the foil targets when irradiated at an angle of 45 degrees with s-polarized pulses. The duration of He-alpha emission from smoked targets, measured with a fast streak camera, was similar to that from Ti foils

Year: 2005
DOI identifier: 10.1209/epl
OAI identifier: oai:eprints.whiterose.ac.uk:1726

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