论文信息 - SUPERSONIC GAS JET TARGET FOR GENERATION OF RELATIVISTIC ELECTRONS WITH 12TW-50fs LASER PULSE

SUPERSONIC GAS JET TARGET FOR GENERATION OF RELATIVISTIC ELECTRONS WITH 12TW-50fs LASER PULSE

We have generated relativistic electrons by interaction between a high intensity ultra-short laser pulse (Ti:Sapphire, max 12TW, λ = 800nm , 50fs, 10Hz) and gas jet. Using the method of characteristics, we designed a supersonic, rapidly expanding conical Laval nozzle to form a well-defined, localized gas target column with the sharp boundary. The experiment was performed with the nozzle, and the energetic electron beam (up to 40MeV) was observed under the condition of the relativistic laser intensity of 1.5 × 10 19 W/cm 2 and the helium gas jet density range of 1 .4 - 3 ×10 19 cm −3 .

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