Laser-accelerated ions from layered targets

Year: 2010

Authors: Gizzi LA., Betti S., Foerster E., Giulietti A., Giulietti D., Kaempfer T., Koester P., Labate L., Levato T., Luebcke A., Robinson A.P.L., Uschmann I., Zamponi F.

Autors Affiliation: ILIL, Istituto Nazionale di Ottica, CNR Campus, Via G. Moruzzi, 1 – 56124 Pisa, Italy; INFN, Sezione di Pisa, Largo B. Pontecorvo 3, Pisa, Italy; Insitut für Optik und Quantenelektronik – Friedrich-Schiller-Universität, Max-Wien-Platz 1, 07743 Jena, Germany; Dipartimento di Fisica, Università degli Studi, Pisa, Italy; Central Laser Facility, Rutherford Appleton Laboratory, Chilton, OX11 0QX, UK; Accademia Navale,Livorno,Italy; Dipartimento di Ingegneria delle Telecomunicazioni, Università degli Studi di Pisa, Italy

Abstract: We investigated laser-driven ion acceleration with tightly focused femtosecond laser pulses at an intensity of 5 x 10(19)W/cm(2). Targets consisting of thin metal foils either back-coated with a mu m-thick dielectric layer or uncoated have been used. The observations we report show that proton bunches with energy in the MeV range have been produced. Furthermore, the protons emitted from back-coated targets exhibit a spatial cross-section which is remarkably more uniform and of significantly smaller size if compared with that of the protons emitted from uncoated foils. The experimental results are discussed in terms of the differences between the propagation of the fast electron current inside the back-coated and uncoated targets. (C) 2010 Elsevier B.V. All rights reserved.


Volume: 620 (1)      Pages from: 83  to: 87

KeyWords: Ion acceleration; Proton acceleration; High energy bunches; Laser-plasma acceleration; Laser-driven bunches
DOI: 10.1016/j.nima.2010.01.065

Citations: 2
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