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Title: Method for generating a plasma wave to accelerate electrons

Abstract

The invention provides a method and apparatus for generating large amplitude nonlinear plasma waves, driven by an optimized train of independently adjustable, intense laser pulses. In the method, optimal pulse widths, interpulse spacing, and intensity profiles of each pulse are determined for each pulse in a series of pulses. A resonant region of the plasma wave phase space is found where the plasma wave is driven most efficiently by the laser pulses. The accelerator system of the invention comprises several parts: the laser system, with its pulse-shaping subsystem; the electron gun system, also called beam source, which preferably comprises photo cathode electron source and RF-LINAC accelerator; electron photo-cathode triggering system; the electron diagnostics; and the feedback system between the electron diagnostics and the laser system. The system also includes plasma source including vacuum chamber, magnetic lens, and magnetic field means. The laser system produces a train of pulses that has been optimized to maximize the axial electric field amplitude of the plasma wave, and thus the electron acceleration, using the method of the invention. 21 figs.

Inventors:
; ;
Issue Date:
Sponsoring Org.:
National Science Foundation, Washington, DC (United States); Office of Naval Research, Washington, DC (United States); USDOE, Washington, DC (United States)
OSTI Identifier:
489098
Patent Number(s):
5,637,966
Application Number:
PAN: 8-384,154; TRN: 97:011392
Assignee:
Univ. of Michigan, Ann Arbor, MI (United States) PTO; SCA: 430100; PA: EDB-97:086875; SN: 97001799023
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 10 Jun 1997
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAT WAVE ACCELERATORS; PLASMA WAVES; LASER RADIATION; ELECTRON GUNS; DESIGN; BEAM MONITORS

Citation Formats

Umstadter, D., Esarey, E., and Kim, J.K. Method for generating a plasma wave to accelerate electrons. United States: N. p., 1997. Web.
Umstadter, D., Esarey, E., & Kim, J.K. Method for generating a plasma wave to accelerate electrons. United States.
Umstadter, D., Esarey, E., and Kim, J.K. Tue . "Method for generating a plasma wave to accelerate electrons". United States.
@article{osti_489098,
title = {Method for generating a plasma wave to accelerate electrons},
author = {Umstadter, D. and Esarey, E. and Kim, J.K.},
abstractNote = {The invention provides a method and apparatus for generating large amplitude nonlinear plasma waves, driven by an optimized train of independently adjustable, intense laser pulses. In the method, optimal pulse widths, interpulse spacing, and intensity profiles of each pulse are determined for each pulse in a series of pulses. A resonant region of the plasma wave phase space is found where the plasma wave is driven most efficiently by the laser pulses. The accelerator system of the invention comprises several parts: the laser system, with its pulse-shaping subsystem; the electron gun system, also called beam source, which preferably comprises photo cathode electron source and RF-LINAC accelerator; electron photo-cathode triggering system; the electron diagnostics; and the feedback system between the electron diagnostics and the laser system. The system also includes plasma source including vacuum chamber, magnetic lens, and magnetic field means. The laser system produces a train of pulses that has been optimized to maximize the axial electric field amplitude of the plasma wave, and thus the electron acceleration, using the method of the invention. 21 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {6}
}