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Habara H, Adumi K, Yabuuchi T, et al. Surface acceleration of fast electrons with relativistic self-focusing in preformed plasma. Phys Rev Lett. 2006;97(9):095004doi: 10.1103/PhysRevLett.97.095004.
Habara, H., Adumi, K., Yabuuchi, T., Nakamura, T., Chen, Z. L., Kashihara, M., Kodama, R., Kondo, K., Kumar, G. R., Lei, L. A., Matsuoka, T., Mima, K., & Tanaka, K. A. (2006). Surface acceleration of fast electrons with relativistic self-focusing in preformed plasma. Physical review letters, 97(9), 095004. https://doi.org/10.1103/PhysRevLett.97.095004
Habara, H, et al. "Surface acceleration of fast electrons with relativistic self-focusing in preformed plasma." Physical review letters vol. 97,9 (2006): 095004. doi: https://doi.org/10.1103/PhysRevLett.97.095004
Habara H, Adumi K, Yabuuchi T, Nakamura T, Chen ZL, Kashihara M, Kodama R, Kondo K, Kumar GR, Lei LA, Matsuoka T, Mima K, Tanaka KA. Surface acceleration of fast electrons with relativistic self-focusing in preformed plasma. Phys Rev Lett. 2006 Sep 01;97(9):095004. doi: 10.1103/PhysRevLett.97.095004. Epub 2006 Sep 01. PMID: 17026373.
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Phys Rev Lett. 2006 Sep 01;97(9):095004. doi: 10.1103/PhysRevLett.97.095004. Epub 2006 Sep 01.

Surface acceleration of fast electrons with relativistic self-focusing in preformed plasma.

Physical review letters

H Habara, K Adumi, T Yabuuchi, T Nakamura, Z L Chen, M Kashihara, R Kodama, K Kondo, G R Kumar, L A Lei, T Matsuoka, K Mima, K A Tanaka

Affiliations

  1. Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan.

PMID: 17026373 DOI: 10.1103/PhysRevLett.97.095004

Abstract

We report an observation of surface acceleration of fast electrons in intense laser-plasma interactions. When a preformed plasma is presented in front of a solid target with a higher laser intensity, the emission direction of fast electrons is changed to the target surface direction from the laser and specular directions. This feature could be caused by the formation of a strong static magnetic field along the target surface which traps and holds fast electrons on the surface. In our experiment, the increase in the laser intensity due to relativistic self-focusing in plasma plays an important role for the formation. The strength of the magnetic field is calculated from the bent angle of the electrons, resulting in tens of percent of laser magnetic field, which agrees well with a two-dimensional particle-in-cell calculation. The strong surface current explains the high conversion efficiency on the cone-guided fast ignitor experiments.

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