Author/Authors :
Cowan، نويسنده , , T.E. and Fuchs، نويسنده , , J. and Ruhl، نويسنده , , H. and Sentoku، نويسنده , , Y. and Kemp، نويسنده , , A. and Audebert، نويسنده , , P. and Roth، نويسنده , , Saba M. and Stephens، نويسنده , , R. and Barton، نويسنده , , I. and Blazevic، نويسنده , , A. and Brambrink، نويسنده , , E. and Cobble، نويسنده , , J. and Fernلndez، نويسنده , , J.C. and Gauthier، نويسنده , , J.-C. and Geissel، نويسنده , , M. and Hegelich، نويسنده , , M. an، نويسنده ,
Abstract :
The laminarity of high current multi-MeV proton beams produced by irradiating thin metallic foils with ultra-intense lasers has been measured. For proton energies >10 MeV, the transverse and longitudinal emittance are, respectively, <0.004 mm mrad and <10−4 eV s, i.e. at least 100-fold and may be as much as 104-fold better than conventional accelerators beams. The ion beam source size is measured to be <15 μm (fwhm) for proton energies >10 MeV. Magnetic stripping of the co-moving electrons out of the beam after a few cm of debunching is not observed to induce emittance growth.
