Projects per year
Two signatures of quantum effects on radiation reaction in the collision of a GeV electron beam with a high intensity (>3×1020Wcm-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 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 . 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 1021W cm-2. This effect should therefore be measurable using current high-intensity laser systems.
|Journal||Journal of Plasma Physics|
|Early online date||11 Sep 2017|
|Publication status||Published - 1 Oct 2017|
Bibliographical note© Cambridge University Press 2017.
- Intense particle beams
- plasma dynamics
- plasma simulation
- 1 Finished
Laser-Plasma Interactions at the Intensity Frontier: the Transition to the QED-Plasma Regime
1/07/15 → 31/08/20
Project: Research project (funded) › Research
Signatures of quantum radiation reaction in laser - electron-beam collisions
Ridgers, C. P. (Creator), University of York, 17 Jul 2017