Method for generating a plasma wave to accelerate electrons

Umstadter, Donald; Esarey, Eric; Kim, Joon K

Title: Method for generating a plasma wave to accelerate electrons

Patent · Wed Jan 01 00:00:00 EST 1997

OSTI ID:870998

Umstadter, Donald ^[1]; Esarey, Eric ^[2]; Kim, Joon K ^[1]

Ann Arbor, MI
Chevy Chase, MD

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.

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Research Organization:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

DOE Contract Number:: AC04-76

Assignee:: Regents of University of Michigan (Ann Arbor, MI)

Patent Number(s):: US 5637966

OSTI ID:: 870998

Country of Publication:: United States

Language:: English

References (12)

Laser Beat Accelerator Tajima, T.; Dawson, J. M. IEEE Transactions on Nuclear Science, Vol. 28, Issue 3 https://doi.org/10.1109/TNS.1981.4332122	journal	June 1981
Interaction of highly relativistic short laser pulses with plasmas and nonlinear wake-field generation Berezhiani, V. I.; Murusidze, I. G. Physica Scripta, Vol. 45, Issue 2 https://doi.org/10.1088/0031-8949/45/2/007	journal	February 1992
Laser accelerator by plasma waves Tajima, T.; Dawson, J. M. AIP Conference Proceedings Volume 91 https://doi.org/10.1063/1.33805	conference	January 1982
Laser Electron Accelerator Tajima, T.; Dawson, J. M. Physical Review Letters, Vol. 43, Issue 4 https://doi.org/10.1103/PhysRevLett.43.267	journal	July 1979
An Electron Accelerator Using a Laser Tajima, Toshi; Dawson, John M. IEEE Transactions on Nuclear Science, Vol. 26, Issue 3 https://doi.org/10.1109/TNS.1979.4330739	journal	June 1979
Resonantly laser-driven plasma waves for electron acceleration Umstadter, D.; Kim, J.; Esarey, E. Physical Review E, Vol. 51, Issue 4 https://doi.org/10.1103/PhysRevE.51.3484	journal	April 1995
Shaping of wide bandwidth 20 femtosecond optical pulses Reitze, D. H.; Weiner, A. M.; Leaird, D. E. Applied Physics Letters, Vol. 61, Issue 11, p. 1260-1262 https://doi.org/10.1063/1.107611	journal	September 1992
Laser wakefield acceleration and relativistic optical guiding Sprangle, P.; Esarey, E.; Ting, A. Applied Physics Letters, Vol. 53, Issue 22 https://doi.org/10.1063/1.100300	journal	November 1988
Nonlinear interaction of intense laser pulses in plasmas Sprangle, P.; Esarey, E.; Ting, A. Physical Review A, Vol. 41, Issue 8 https://doi.org/10.1103/PhysRevA.41.4463	journal	April 1990
Femtosecond Lasers: the next Generation Kapteyn, Henry C.; Murnane, Margaret M. Optics and Photonics News, Vol. 5, Issue 3 https://doi.org/10.1364/OPN.5.3.000020	journal	January 1994
100-fs pulse generation and amplification in Ti:Al_2O_3 Squier, Jeff; Harter, Donald; Salin, François Optics Letters, Vol. 16, Issue 5 https://doi.org/10.1364/OL.16.000324	journal	January 1991
Nonlinear Plasma Waves Resonantly Driven by Optimized Laser Pulse Trains Umstadter, D.; Esarey, E.; Kim, J. Physical Review Letters, Vol. 72, Issue 8, p. 1224-1227 https://doi.org/10.1103/PhysRevLett.72.1224	journal	February 1994

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method
generating
plasma
wave
accelerate
electrons
provides
apparatus
amplitude
nonlinear
waves
driven
optimized
train
independently
adjustable
intense
laser
pulses
optimal
pulse
widths
interpulse
spacing
intensity
profiles
determined
series
resonant
region
phase
space
found
efficiently
accelerator
comprises
pulse-shaping
subsystem
electron
gun
called
beam
source
preferably
photo
cathode
rf-linac
photo-cathode
triggering
diagnostics
feedback
including
vacuum
chamber
magnetic
lens
field
means
produces
maximize
axial
electric
acceleration
plasma wave
magnetic lens
electron source
laser pulses
plasma source
pulse width
vacuum chamber
laser pulse
electric field
magnetic field
preferably comprises
beam source
electron gun
intensity profile
pulse widths
phase space
cathode electron
accelerate electrons
axial electric
field means
preferably comprise
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Title: Method for generating a plasma wave to accelerate electrons

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References (12)

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