Effect of reentrant cone geometry on energy transport in intense laser-plasma interactions

K L Lancaster, M Sherlock, J S Green, C D Gregory, P Hakel, K U Akli, F N Beg, S N Chen, R R Freeman, H Habara, R Heathcote, D S Hey, K Highbarger, M H Key, R Kodama, K Krushelnick, H Nakamura, M Nakatsutsumi, J Pasley, R B StephensM Storm, M Tampo, W Theobald, L Van Woerkom, R L Weber, M S Wei, N C Woolsey, T Yabuuchi, P A Norreys

Research output: Contribution to journalArticlepeer-review

Abstract

The energy transport in cone-guided low- Z targets has been studied for laser intensities on target of 2.5x10(20) W cm(-2). Extreme ultraviolet (XUV) imaging and transverse optical shadowgraphy of the rear surfaces of slab and cone-slab targets show that the cone geometry strongly influences the observed transport patterns. The XUV intensity showed an average spot size of 65+/-10 microm for slab targets. The cone slabs showed a reduced spot size of 44+/-10 microm. The shadowgraphy for the aforementioned shots demonstrate the same behavior. The transverse size of the expansion pattern was 357+/-32 microm for the slabs and reduced to 210+/-30 microm. A transport model was constructed which showed that the change in transport pattern is due to suppression of refluxing electrons in the material surrounding the cone.
Original languageEnglish
Pages (from-to)045401
JournalPhysical Review E - Statistical, Nonlinear and Soft Matter Physics
Volume80
Issue number4 Pt 2
Publication statusPublished - 2009

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