Short pulsed X-rays were experimentally generated by 90/spl deg/ Thomson scatterings of 2 TW, 90 fs laser pulses by 17 MeV electron beams. Synchronization between the laser pulses and electron beams were achieved within a few ps. A 100 fs X-ray pulse will be generated via backward Thomson scatterings from a 100 fs electron bunch made by a bunch compression chicane. A high peak power, high brightness, high repetitive laser synchrotron radiation source consisting of counter-colliding laser and electron storage rings is proposed.
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