Self-modulated wakefield and forced laser wakefield acceleration of electrons

  title={Self-modulated wakefield and forced laser wakefield acceleration of electrons},
  author={Z. Najmudin and K. Krushelnick and Eugene L. Clark and Stuart P. D. Mangles and B. Walton and A. E. Dangor and Sven Fritzler and Victor Malka and Erik Lefebvre and D. Gordon and Frank S. Tsung and Chan Joshi},
  journal={Physics of Plasmas},
The interaction of intense laser pulses (power>30 TW) with underdense plasmas has been studied. In the regime where the pulse length is much longer than the plasma period (τl≫2πωp−1), the laser pulse is found to be self-modulated at the plasma frequency by the forward Raman scattering instability. Wavebreaking of the resulting plasma wave results in energetic electrons being accelerated to more than 100 MeV. Reducing the pulse length so that τl∼2πωp−1, but retaining the same power, also leads… 

Figures from this paper

Controlled plasma wave generation and particle acceleration through seeding of the forward Raman scattering instability
Trapping and acceleration of background plasma electrons in plasma waves generated by low energy (<0.1J) laser pulses copropagating with much weaker (1% in intensity) seed pulses that are down
Laser-Driven Electron Accelerators as a Broadband Radiation Source - from Infrared to X-Rays
This dissertation explores the acceleration of electrons and associated production of radiation through the interaction of intense laser pulses with underdense plasma. For femtosecond duration
Group velocity dispersion and relativistic effects on the wakefield induced by chirped laser pulse in parabolic plasma channel
The excitation of wake field plasma waves by a short laser pulse propagating through a parabolic plasma channel is studied. The laser pulse is assumed to be initially chirped. In this regard, the
The diagnostics of ultra-short pulse laser-produced plasma
Since the invention of the laser, coherent light has been used to break down solid or gaseous material and transform it into a plasma. Over the last three decades two things have changed. Due to
Mono-Energetic Beams from Laser Plasma Interactions
A laser driven wakefield accelerator has been tuned to produce high energy electron bunches with low emittance and energy spread by extending the interaction length using a plasma channel. Wakefield
High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding
A laser accelerator that produces electron beams with an energy spread of a few per cent, low emittance and increased energy (more than 109 electrons above 80 MeV) and opens the way for compact and tunable high-brightness sources of electrons and radiation.
Plasma modulator for high-power intense lasers.
It is illustrated via theory and simulation that a high-power sub-relativistic laser pulse can be self-modulated to a broad bandwidth over 100% after it passes through a tenuous plasma.
Measurements of forward scattered spectra from intense laser interactions in the forced laser wake-field regime
Results of an experiment using an ultra-short laser pulse to create plasma waves through the forced laser wake-field process are described. The transmitted optical spectra are shown to exhibit both
Femtosecond x rays from laser-plasma accelerators
Relativistic interaction of short-pulse lasers with underdense plasmas has recently led to the emergence of a novel generation of femtosecond x-ray sources. Based on radiation from electrons
Multi-pulse laser wakefield acceleration: a new route to efficient, high-repetition-rate plasma accelerators and high flux radiation sources
Laser-driven plasma accelerators can generate accelerating gradients three orders of magnitude larger than radio-frequency accelerators and have achieved beam energies above 1 GeV in centimetre long


Electron Acceleration by a Wake Field Forced by an Intense Ultrashort Laser Pulse
It is shown that a gain in maximum electron energy of up to 200 megaelectronvolts can be achieved, along with an improvement in the quality of the ultrashort electron beam in the forced laser wake field regime.
Nonlinear interaction of intense laser pulses in plasmas.
  • Sprangle, Esarey, Ting
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1990
A nonlinear 1D theory is developed which describes some important aspects of intense laser-plasma interactions and finds coherent harmonic generation using a linearly polarized laser to be most efficient for short laser pulses and can be enhanced by the presence of large amplitude plasma wakefields.
Electron acceleration from the breaking of relativistic plasma waves
ELECTRONS in a plasma undergo collective wave-like oscillations near the plasma frequency. These plasma waves can have a range of wavelengths and hence a range of phase velocities1. Of particular
Characterization of electron beams produced by ultrashort (30 fs) laser pulses
Detailed measurements of electron spectra and charges from the interaction of 10 Hz, 600 mJ laser pulses in the relativistic regime with a gas jet have been done over a wide range of intensities
Investigation of a channeling high-intensity laser beam in underdense plasmas
The interaction of an intense short pulse laser (>5/spl times/10/sup 18/ Wcm/sup -2/) with underdense plasma was extensively studied. The beam is found to be highly susceptible to the forward Raman
Particle acceleration in relativistic laser channels
Energy spectra of ions and fast electrons accelerated by a channeling laser pulse in near-critical plasma are studied using three-dimensional (3D) Particle-In-Cell simulations. The realistic 3D
Physics and Applications of Relativistic Plasmas Driven by Ultra-intense Lasers
As tabletop lasers continue to reach record levels of peak power, the interaction of light with matter has crossed a new threshold, in which plasma electrons at the laser focus oscillate at
Generation of ultrahigh intensity laser pulses
Mainly due to the method of chirped pulse amplification, laser intensities have grown remarkably during recent years. However, the attaining of very much higher powers is limited by the material
Nonlinear depletion of ultrashort and relativistically strong laser pulses in an underdense plasma
The depletion of a relativistically strong laser pulse in the course of interaction with underdense plasmas is considered. The driving mechanisms of distortion and fast depletion of the pulse due to