Electron-Positron Pair-Beam Production and Acceleration in Ultra-Strong Laser-Plasma Interactions

Recent tremendous advances of ultraintense lasers have enabled the production of positrons via pair creation in ultrastrong fields in plasma. This process produces an electron-positron pair beam with relativistic energy in an overdense plasma, where an ultraintense ultrashort laser pulse propagates. We propose an intense pair-beam production and its acceleration up to high energies via consecutive interactions with ultrastrong laser fields. Applications of pair-beams provide a new concept of laser-plasma accelerators and an electron-positron collider in a micro-scale size.