Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

The energy spectrum and the angular distribution of the hot electrons generated by an ultra-intense femtosecond laser interacting with a solid target are studied. The intensity of the femtosecond laser is 8.5 × 1018 W·cm -2 and the pulse duration is 30 fs in experiment. The temperature of the hot electrons at the normal of the target is 550 keV. Resonance absorption is the main mechanism that leads to the laser acceleration of the hot electrons at the normal of the target. And it accords with large plasma density scale length generated by pre-pulse which preceded the main pulse. The emission direction of the hot electron is normal to the rear surface for 30 μm target, and the emission peak disappears for 2 mm target.

Type

Journal article

Journal

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Publication Date

01/08/2007

Volume

19

Pages

1373 - 1376