Role of resistivity gradient in laser-driven ion acceleration

Year: 2011

Authors: Gizzi LA., Betti S., Forster E., Giulietti D., Hofer S., Koester P., Labate L., Lotzsch R., Robinson APL., Uschmann I.

Autors Affiliation: CNR, UOS Adriano Gozzini, Ist Nazl Ott, ILIL, I-56100 Pisa, Italy;
Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy;
Univ Jena, Inst Opt & Quantenelekt, D-07743 Jena, Germany;
Rutherford Appleton Lab, Cent Laser Facil, Chilton OX11 0QX, England;
Accademia Navale, Livorno, Italy;
Univ Pisa, Dipartimento Ingn Telecomunicaz, I-56100 Pisa, Italy;
Helmholtz Inst Jena, D-07743 Jena, Germany;
Univ Pisa, Dipartimento Fis, Pisa, Italy

Abstract: It was predicted that, when a fast electron beam with some angular spread is normally incident on a resistivity gradient, magnetic field generation can occur that can inhibit beam propagation [A. R. Bell et al., Phys. Rev. E 58, 2471 (1998)]. This effect can have consequences on the laser-driven ion acceleration. In the experiment reported here, we compare ion emission from laser irradiated coated and uncoated metal foils and we show that the ion beam from the coated target has a much smaller angular spread. Detailed hybrid numerical simulations confirm that the inhibition of fast electron transport through the resistivity gradient may explain the observed effect.

Journal/Review: PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS

Volume: 14 (1)      Pages from: 011301  to: 011301

More Information: This work was carried out in the framework of the HiPER Project and was partially supported by the MIUR-FIRB project SPARX, by the MIUR-PRIN-2007 project \”Studio della generazione di elettroni veloci…\’\’, and by the INFN project PLASMONX. We also acknowledge support from the ESF COST Action MP0601. Access to the IOQ installation was supported by LASERLAB. We wish to acknowledge the JETI laser crew for their invaluable support and the DFG (German Science Foundation). We also acknowledge enlightening discussion with Antonio Giulietti. The present work is part of the \”High Field Photonics\’\’ CNR Research Unit.
KeyWords: fast-electron transport; solid experiments; proton-beams; ignition; plasmas
DOI: 10.1103/PhysRevSTAB.14.011301

Citations: 20
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