Abstract
We developed a highly efficient and compact Ti:sapphire multipass amplifier that uses divergent seed beams to generate 20 TW/40 fs laser pulses with a repetition rate of 10 Hz. The laser system consists of a mode-locked oscillator, a regenerative amplifier, and a multipass power amplifier. The thermal lensing effect is very important in this system, especially in the multipass amplifier, as it limits the conversion efficiency. In order to compensate the thermal lensing effect, we calculated the optimum divergence of the seed beam and used the result for the multipass amplifier, where the thermal focusing is taken into account. In this way, we achieved a very high conversion efficiency of 41%, which is close to the theoretical limit. The laser system was then used with a capillary gas cell to generate stable high-energy electron beams with electron energies of about 150 MeV and a beam divergence of 4 ± 1 mrad. In this paper, details of the laser system development and experimental results for electron generation are presented.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
