IPAC'10 - List of Authors (Papadichev, V.A.)

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Papadichev, V.A.

Paper	Title	Page
THPD041	Evolution of Electron Bunches in a Combined Quasi-static and Laser Electric Field	4372
	V.A. Papadichev LPI, Moscow
	Short pulses of electrons of femtosecond and attosecond duration are necessary for numerous applications: studying fast processes in physics, chemistry, biology and medicine. Previous calculations revealed that it is possible to obtain such short bunches by applying quasi-static electric voltage to a needle placed into a laser focus,*. This paper presents results of computer simulation of the electron bunch evolution for various parameters of the problem (quasi-static and laser electric fields, radius of curvature of the needle, velocity of electron emission etc.). Simple model for analytical calculation of bunch evolution was elaborated to precisely assess its shortening in the case when one can neglect space-charge forces in the bunch. Influence of velocity dispersion in the bunch due to emission process is discussed and the way to optimize the bunching was proposed. Bunch dynamics accounting for space-charge forces was studied using analytical solution of equation of motion. P.Emma. Proc. EPAC04, p. 225, Lucerne, Suisse. V.A.Papadichev. Proc. EPAC08, p. 2812, Genoa, Italy. * V.A.Papadichev. Proc. EPAC08, p. 2815, Genoa, Italy.

Paper

Title

Page

THPD041

Evolution of Electron Bunches in a Combined Quasi-static and Laser Electric Field

4372

V.A. Papadichev
LPI, Moscow

Short pulses of electrons of femtosecond and attosecond duration are necessary for numerous applications: studying fast processes in physics, chemistry, biology and medicine*. Previous calculations revealed that it is possible to obtain such short bunches by applying quasi-static electric voltage to a needle placed into a laser focus**,***. This paper presents results of computer simulation of the electron bunch evolution for various parameters of the problem (quasi-static and laser electric fields, radius of curvature of the needle, velocity of electron emission etc.). Simple model for analytical calculation of bunch evolution was elaborated to precisely assess its shortening in the case when one can neglect space-charge forces in the bunch. Influence of velocity dispersion in the bunch due to emission process is discussed and the way to optimize the bunching was proposed. Bunch dynamics accounting for space-charge forces was studied using analytical solution of equation of motion.

* P.Emma. Proc. EPAC04, p. 225, Lucerne, Suisse.
** V.A.Papadichev. Proc. EPAC08, p. 2812, Genoa, Italy.
*** V.A.Papadichev. Proc. EPAC08, p. 2815, Genoa, Italy.