Directed inward beams of ions in laser produced plasma

V.S. Belyaev; A.Ya. Faenov; A.I. Magunov; A.P. Matafonov; T.A. Pikuz; S.A. Pikuz Jr.; I.Yu. Skobelev; V.I. Vinogradov

doi:doi:10.1051/jp4:2006133108

Issue		J. Phys. IV France Volume 133, June 2006


Page(s)		525 - 527
DOI		https://doi.org/10.1051/jp4:2006133108
Published online		16 June 2006

Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 525-527
DOI: 10.1051/jp4:2006133108

Directed inward beams of ions in laser produced plasma

V.S. Belyaev¹, A.Ya. Faenov², A.I. Magunov², A.P. Matafonov¹, T.A. Pikuz², S.A. Pikuz Jr.³, I.Yu. Skobelev² and V.I. Vinogradov¹

¹ Central Research Institute of Machine Building Korolev, Russia
² Multicharged Ions Spectra Data Center of VNIFTRI, Mendeleevo, Russia
³ Moscow State University, Moscow, Russia

Abstract
We investigated the ion characteristics in picosecond laser plasma at laser radiation intensity of up to $2\times 10^{18}$ W/cm². Our experimental observations of X-ray spectral line profiles confirmed the presence of a great quantity of high-energy ions ( $\sim$ 1 MeV) in laser plasma. Besides, by the $L_{y\alpha }$ Doppler profile's red shift we revealed the high-energy ion motion directed inward the target. For this phenomenon we suggest our theoretical model. The high energy "tail" in the energy spectrum of ions in laser plasmas can be explained by the pinch effect. The effective way for production of beams of charged particles in laser plasmas is the electric drift of these particles in electromagnetic fields generated in the laser-produced plasmas.