Borghesi, M.Campbell, H.Hatchett, S.Key, M. H.MacKinnon, A. J.Patel, P, K.Schiavi, A.Snavely, R.Wilks, S. C.Willi, O.2004-12-102004-12-1020012001http://hdl.handle.net/2003/1848310.17877/DE290R-8542enThe American Physical SocietyPhysical Review Letters530Effect of Plasma Scale Length on Multi-MeV Proton Production by Intense Laser Pulses10.1103/PhysRevLett.86.1769article (journal)