Collimated beam of MeV electrons accelerated by a terawatt laser

R. Wagner, S. Y. Chen, A. Maksimchuk, E. Dodd, J. K. Kim, D. Umstadter

Research output: Contribution to conferencePaper

Abstract

It is demonstrated that a laser wake field can produce a collimated beam of MeV electrons and that the laser may be guided by relativistic self-focusing and electron cavitation. The experiment is remarkably simple. A high-power laser is focused into a molecular beam produced by a gas jet. The laser used in the experiment has a pulse duration of τ = 400 fs, and an energy up to 10 J, corresponding to a peak power of 25 TW. When focused in vacuum with an f/5 off-axis parabolic mirror, the laser can reach an intensity of up to 1019 W/cm2. To create the plasma, the gas from a pulsed valve is tunnel-ionized by the laser pulse itself, reaching a peak electron density on axis of 1019 cm-3. The electron source size is estimated to be 10 μm and the electron pulse duration, a few picoseconds.

Original languageEnglish (US)
Number of pages1
StatePublished - 1996
EventProceedings of the 1996 6th Quantum Electronics and Laser Science Conference, QELS - Anaheim, CA, USA
Duration: Jun 2 1996Jun 7 1996

Conference

ConferenceProceedings of the 1996 6th Quantum Electronics and Laser Science Conference, QELS
CityAnaheim, CA, USA
Period6/2/966/7/96

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Wagner, R., Chen, S. Y., Maksimchuk, A., Dodd, E., Kim, J. K., & Umstadter, D. (1996). Collimated beam of MeV electrons accelerated by a terawatt laser. Paper presented at Proceedings of the 1996 6th Quantum Electronics and Laser Science Conference, QELS, Anaheim, CA, USA, .