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Phys. Rev. A 73, 053202 (2006) [9 pages]

Controlled shock shells and intracluster fusion reactions in the explosion of large clusters

F. Peano,1,2 R. A. Fonseca,2 J. L. Martins,2 and L. O. Silva2
1Dipartimento di Energetica, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy
2GoLP/Centro de Física dos Plasmas, Instituto Superior Técnico, 1049-001 Lisboa, Portugal

Received 5 September 2005; published 17 May 2006

The ion phase-space dynamics in the Coulomb explosion of very large (~106–107 atoms) deuterium clusters can be tailored using two consecutive laser pulses with different intensities and an appropriate time delay. For suitable sets of laser parameters (intensities and delay), large-scale shock shells form during the explosion, thus highly increasing the probability of fusion reactions within the single exploding clusters. In order to analyze the ion dynamics and evaluate the intracluster reaction rate, a one-dimensional theory is used, which approximately accounts for the electron expulsion from the clusters. It is found that, for very large clusters (initial radius ~100  nm), and optimal laser parameters, the intracluster fusion yield becomes comparable to the intercluster fusion yield. The validity of the results is confirmed with three-dimensional particle-in-cell simulations.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.73.053202
DOI: 10.1103/PhysRevA.73.053202
PACS: 36.40.Gk; 52.65.-y
  • 36.40.Gk
    Plasma and collective effects in atomic and molecular clusters
  • 52.65.-y
    Plasma simulation
  • YEAR: 2006
KEYWORDS: deuterium, atomic clusters, photodissociation, molecule-photon collisions, photoionisation, plasma production by laser, plasma simulation, plasma shock waves, plasma interactions

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