Abstract
We propose a method to use traveling-wave Thomson scattering for spatiotemporally-resolved electron spectroscopy. This can enable ultrafast time-resolved measurements of the dynamics of relativistic electrons in the presence of extremely intense light fields, either in vacuum or in plasma, such as in laser wakefield accelerators. We demonstrate, with test-particle simulation and analysis, the capability of this technique for measurements of various high field phenomena: radiation reaction of electrons due to scattering, dephasing of a laser wakefield accelerator, and acceleration of electrons in multiple buckets by a laser wakefield.
Highlights
Relativistic electron beams provide the foundation for accelerator-driven x-ray light sources, including synchrotrons [1], free-electron lasers [2] and Compton sources [3]
The electron trajectory calculation takes into account the radiation reaction process based on the Lorentz-Abraham-Dirac (LAD) model, which will be discussed in Sec
Traveling-wave Thomson scattering involves a spatiotemporal overlap of a laser pulse and an electron beam, with an accuracy of a few microns and a few femtoseconds
Summary
Relativistic electron beams provide the foundation for accelerator-driven x-ray light sources, including synchrotrons [1], free-electron lasers [2] and Compton sources [3]. When laser light is TS by a relativistic electron, the energy of the scattering photon is Dopplerupshifted by an amount proportional to the electron energy This dependence allows the electron energy to be measured by measuring the energy of the scattered photon, as was demonstrated experimentally over a large energy range [4,5]. It is quite convenient to use TS spectroscopy to diagnose electron beams that are either driven by laserdriven accelerators or used in ICS x-ray light sources [10], because the same laser can drive them all
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