TY - JOUR

T1 - Relativistic electron acceleration in focused laser fields after above-threshold ionization

AU - Dodin, I. Y.

AU - Fisch, N. J.

PY - 2003

Y1 - 2003

N2 - Electrons produced as a result of above-threshold ionization of high-[Formula presented] atoms can be accelerated by currently producible laser pulses up to GeV energies, as shown recently by Hu and Starace [Phys. Rev. Lett. [Formula presented] 245003 (2002)]. To describe electron acceleration by general focused laser fields, we employ an analytical model based on a Hamiltonian, fully relativistic, ponderomotive approach. Though the above-threshold ionization represents an abrupt process compared to laser oscillations, the ponderomotive approach can still adequately predict the resulting energy gain if the proper initial conditions are introduced for the particle drift following the ionization event. Analytical expressions for electron energy gain are derived and the applicability conditions of the ponderomotive formulation are studied both analytically and numerically. The theoretical predictions are supported by numerical computations.

AB - Electrons produced as a result of above-threshold ionization of high-[Formula presented] atoms can be accelerated by currently producible laser pulses up to GeV energies, as shown recently by Hu and Starace [Phys. Rev. Lett. [Formula presented] 245003 (2002)]. To describe electron acceleration by general focused laser fields, we employ an analytical model based on a Hamiltonian, fully relativistic, ponderomotive approach. Though the above-threshold ionization represents an abrupt process compared to laser oscillations, the ponderomotive approach can still adequately predict the resulting energy gain if the proper initial conditions are introduced for the particle drift following the ionization event. Analytical expressions for electron energy gain are derived and the applicability conditions of the ponderomotive formulation are studied both analytically and numerically. The theoretical predictions are supported by numerical computations.

UR - http://www.scopus.com/inward/record.url?scp=85035284259&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85035284259&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.68.056402

DO - 10.1103/PhysRevE.68.056402

M3 - Article

C2 - 14682889

AN - SCOPUS:85035284259

SN - 1063-651X

VL - 68

JO - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

JF - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

IS - 5

ER -