Gamma Photons and electron-pairs Generation estimation for collision of PW-class Laser and electron beams

Abstract

After the proposal of the concept of CPA techniques, the laser intensity has boosted dramatically since then. As the focusing intensity of the laser beam reaches the order above 1023 W/cm2 for multiple PW laser facilities, the laser material interaction enters the QED regime, where the gamma photons generation and electrons-positron pairs generation can be realized. This paper provides an overview of the current research in the field of electrodynamics about laser intensities and electron generation. Basic theories of the generation of e and e- pair and photons are introduced. The history of the development of major laser facilities with high-laser intensities is introduced, and the laser facilities are compared and discuss in terms of the electron generations. The results are further compared with the PIC simulation and typical generation scenarios are demonstrated. Potential limits are mentioned as the drawbacks of the models. Overall, these results shed light on guiding further exploration of laser-plasma interactions in the extremely strong intensity laser beam.