Observations of underdense plasma lens focusing of relativistic electron beams

Author

Thompson, M.C. ; Badakov, H. ; Rosenzweig, J.B. ; Travish, G. ; Fliller, R. ; Kazakevich, G.M. ; Piot, P. ; Santucci, J. ; Li, J. ; Tikhoplav, R.

Author_Institution

UCLA, Los Angeles

fYear

2007

fDate

25-29 June 2007

Firstpage

1907

Lastpage

1909

Abstract

Focusing of a 15 MeV, 19 nC electron bunch by an underdense plasma lens operated just beyond the threshold of the underdense condition has been demonstrated in experiments at the Fermilab NICADD Photoinjector Laboratory (FNPL). The strong 1.9 cm focal-length plasma-lens focused both transverse directions simultaneously and reduced the minimum area of the beam spot by a factor of 23. Analysis of the beam-envelope evolution observed near the beam waist shows that the spherical aberrations of this underdense lens are lower than those of an overdense plasma lens, as predicted by theory. Correlations between the beam charge and the properties of the beam focus corroborate this conclusion.

Keywords

aberrations; electron beam focusing; particle beam bunching; plasma focus; relativistic electron beams; relativistic plasmas; FNPL; Fermilab NICADD Photoinjector Laboratory; beam-envelope evolution; electron bunch; electron volt energy 15 MeV; relativistic electron beams; spherical aberrations; underdense plasma lens focusing; Electron beams; Ion beams; Lenses; Particle beams; Plasma density; Plasma devices; Plasma displays; Plasma properties; Plasma transport processes; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4441128

Filename

4441128