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Abstract:
Electron-positron and γ-photon production by high-intensity laser pulses is investigated for a special target geometry, in which two pulses irradiate a very thin foil (10-100 mn < skin depth) with same intensity from opposite sides. A stationary solution is derived describing foil compression between the two pulses. Circular polarization is chosen such that all electrons and positions rotate in the plane of the foil. We discuss the laser and target parameters required in order to optimize the γ photon and pair production rate. We find a γ- photon intensity of 7 x 1027/sr s and a positron density of 5 x 1022/cm3 when using two 330 fs, 7 x 1021W/cm2 laser pulses.
