Phys. Rev. E 80, 045401(R) (2009) [4 pages]Effect of reentrant cone geometry on energy transport in intense laser-plasma interactions
The energy transport in cone-guided low-Z targets has been studied for laser intensities on target of 2.5×1020 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 μm for slab targets. The cone slabs showed a reduced spot size of 44±10 μm. The shadowgraphy for the aforementioned shots demonstrate the same behavior. The transverse size of the expansion pattern was 357±32 μm for the slabs and reduced to 210±30 μm. 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.80.045401
DOI:
10.1103/PhysRevE.80.045401
PACS:
52.38.Kd, 52.57.Kk
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