抄録
A commercial base 1.5 TW Ti:Sapphire laser system was improved to be 10 TW one. By improving a design of a chirped plse-amplification of 1.5 TW system, the pulse width was shortened from 100 fs to 40 fs, and the output energy was increased from 150 mJ to 400 mJ. With this system, a high energy electron beam was generated from Ar gasjet target. The maximum energy was more than 4.5 MeV with the electron density of 1.5∼3×1019 cm-3. The effective temperature was estimated to be 0.61 MeV.
