| Literature DB >> 18232779 |
J S Green1, V M Ovchinnikov, R G Evans, K U Akli, H Azechi, F N Beg, C Bellei, R R Freeman, H Habara, R Heathcote, M H Key, J A King, K L Lancaster, N C Lopes, T Ma, A J MacKinnon, K Markey, A McPhee, Z Najmudin, P Nilson, R Onofrei, R Stephens, K Takeda, K A Tanaka, W Theobald, T Tanimoto, J Waugh, L Van Woerkom, N C Woolsey, M Zepf, J R Davies, P A Norreys.
Abstract
Metal foil targets were irradiated with 1 mum wavelength (lambda) laser pulses of 5 ps duration and focused intensities (I) of up to 4x10;{19} W cm;{-2}, giving values of both Ilambda;{2} and pulse duration comparable to those required for fast ignition inertial fusion. The divergence of the electrons accelerated into the target was determined from spatially resolved measurements of x-ray K_{alpha} emission and from transverse probing of the plasma formed on the back of the foils. Comparison of the divergence with other published data shows that it increases with Ilambda;{2} and is independent of pulse duration. Two-dimensional particle-in-cell simulations reproduce these results, indicating that it is a fundamental property of the laser-plasma interaction.Entities:
Year: 2008 PMID： 18232779 DOI： 10.1103/PhysRevLett.100.015003
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161