Signatures of quantum effects on radiation reaction in laser -- electron-beam collisions

Abstract

Two signatures of quantum effects on radiation reaction in the collision of a ~GeV electron-beam with a high-intensity (>3x10^20W/cm^2) laser-pulse have been considered. We show that the decrease in the average energy of the electron-beam may be used to measure the Gaunt factor g for synchrotron emission. We derive an equation for the evolution of the variance in the energy of the electron-beam in the quantum regime, i.e. quantum efficiency parameter eta > 0.1$. We show that the evolution of the variance may be used as a direct measure of the quantum stochasticity of the radiation reaction and determine the parameter regime where this is observable. For example, stochastic emission results in a 25% increase in the standard deviation of the energy spectrum of a GeV electron beam, 1 fs after it collides with a laser pulse of intensity 10^21 W/cm^2. This effect should therefore be measurable using current high-intensity laser systems.

References in corpus (10)

• Prolific pair production with high-power lasers
• QED cascades induced by circularly polarized laser fields
• Ultra-high brilliance multi-MeV $\gamma$-ray beam from non-linear Thomson scattering
• Quantum radiation reaction effects in multiphoton Compton scattering
• Quantum radiation reaction in laser-electron beam collisions
• Pair Creation in QED-Strong Pulsed Laser Fields Interacting with Electron Beams
• Consequences of Dirac Theory of the Positron
• The effect of non-linear quantum electrodynamics on relativistic transparency and laser absorption in ultra-relativistic plasmas
• Experimental investigations of synchrotron radiation at the onset of the quantum regime
• Measuring quantum radiation reaction in laser--electron-beam collisions

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• Analytical solutions for quantum radiation reaction in high-intensity lasers
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• A Frenet-Serret Interpretation of Particle Dynamics in High-Intensity Laser Fields
• Improving the accuracy of hard photon emission by Sigmoid sampling of the QED-table in particle-in-cell-Monte-Carlo simulations
• Effect of electron-beam energy chirp on signatures of radiation reaction in laser-based experiments
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• The effect of the electron's spin magnetic moment on quantum radiation in strong electromagnetic fields
• Novel Signatures of Radiation Reaction in Electron-Laser Sidescattering
• Radiation Reaction Enhancement in Flying Focus Pulses
• Optimal laser focusing for positron production in laser-electron scattering