Coherent Electron Acceleration by Subcycle Laser Pulses

Rau, B.; Tajima, T.; Hōjō, H.

doi:10.1103/physrevlett.78.3310

Cited by 113 publications

(57 citation statements)

References 15 publications

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“…Designing such an injector is a task in itself (see, e.g., [11][12][13]), but we are not going to investigate it here. Motion of the high energy electrons of the beam in the plasma wakefield is analyzed based on the following assumptions: (i) The phase space area occupied by the beam particles is small; (ii) the wakefield is not affected by the beam (however, the beam loading can be included [6]); (iii) the particles in the beam are highly relativistic and move predominantly in the z direction (which is the direction of propagation of the laser pulse),…”

Section: Wakefield Modelmentioning

confidence: 99%

Particle dynamics in multistage wakefield collider

Cheshkov

Tajima

Horton

et al. 2000

Phys. Rev. ST Accel. Beams

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The dynamics of particles in laser pulse-driven wakefields over multistages in a collider is studied. A map of phase space dynamics over a stage of wakefield acceleration induced by a laser pulse (or electron beam) is derived. The entire system of a collider is generated with a product of multiple maps of wakefields, drifts, magnets, etc. This systems map may include offsets of various elements of the accelerator, representing noise and errors arising from the operation of such a complex device. We find that an unmitigated strong focusing of the wakefield coupled with the alignment errors of the position (or laser beam aiming) of each wakefield stage and the unavoidable dispersion in individual particle betatron frequencies leads to a phase space mixing and causes a transverse emittance degradation. The rate of the emittance increase is proportional to the number of stages, the energy of the particles, the betatron frequency, the square of the misalignment amplitude, and the square of the betatron phase shift over a single stage. The accelerator with a weakened focus in a channel can, therefore, largely suppress the emittance degradation due to errors.

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Section: Wakefield Modelmentioning

confidence: 99%

Particle dynamics in multistage wakefield collider

Cheshkov

Tajima

Horton

et al. 2000

Phys. Rev. ST Accel. Beams

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“…If the pulse quickly diffracts before the full interaction, say over the Rayleigh length, p x is simply proportional to EQ. Now let us imagine, for the moment, that the laser has only half the period (unipolar) [16] or subcyclic [17]. In this case the energy (or momentum) gain is Ae ~ m^a\.…”

Section: Particle Accelerationmentioning

confidence: 99%

Superstrong field science

Tajima¹,

Mourou²

2002

AIP Conference Proceedings

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Abstract. Over the past fifteen years we have seen a surge in our ability to produce high intensities, five to six orders of magnitude higher than was possible before. At these intensities, particles, electrons and protons, acquire kinetic energy in the mega-electron-volt range through interaction with intense laser fields. This opens a new age for the laser, the age of nonlinear relativistic optics coupling even with nuclear physics. We suggest a path to reach an extremely high-intensity level 10 26~28 W/cm 2 in the coming decade, much beyond the current and near future intensity regime 10 23 W/cm 2 , taking advantage of the megajoule laser facilities. Such a laser at extreme high intensity could accelerate particles to frontiers of high energy, tera-electron-volt and peta-electronvolt, and would become a tool of fundamental physics encompassing particle physics, gravitational physics, nonlinear field theory, ultrahigh-pressure physics, astrophysics, and cosmology. Such a laser intensity may also be very beneficial to an alternative, more direct approach of fast ignition in laser fusion. We suggest a new possibility to explore this.

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“…Since initial publication of the idea, a number of variations on optical injection have been proposed [12]. However, none of these dealt with transverse effects of the plasma waves, which can be significant, as pointed out in [13].…”

Section: Introductionmentioning

confidence: 99%

Simulation of ultrashort electron pulse generation from optical injection into wake-field plasma waves

2004

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A laser-plasma-based source of relativistic electrons is described in detail, and analyzed in two dimensions using theoretical and numeric techniques. Two laser beams are focused in a plasma, one exciting a wake-field electron plasma wave while another locally alters some electron trajectories in such a way that they can be trapped and accelerated by the wave. Previous analyses dealt only with one-dimensional models. In this paper two-dimensional particle-in-cell simulations and analysis of single particle trajectories show that the radial wake field plays an important role. The simulation results are interpreted to evaluate the accelerated electron beam's properties and compared with existing devices.

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Coherent Electron Acceleration by Subcycle Laser Pulses

Cited by 113 publications

References 15 publications

Particle dynamics in multistage wakefield collider

Particle dynamics in multistage wakefield collider

Superstrong field science

Simulation of ultrashort electron pulse generation from optical injection into wake-field plasma waves

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