Multi-MeV electron beam generation by direct laser acceleration in high-density plasma channels

被引：405

作者：

Gahn, C ^{[1
]}

Tsakiris, GD

Pukhov, A

Meyer-ter-Vehn, J

Pretzler, G

Thirolf, P

Habs, D

Witte, KJ

机构：

[1] Max Planck Inst Quantenopt, D-85748 Garching, Germany

[2] LMU Munchen, Sekt Phys, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.83.4772

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured angularly resolved and absolutely calibrated spectra or the multi-MeV electrons produced by relativistic self-channeling in a high-density gas jet. Using 200 fs laser pulses with P-L = 1.2 TW, we have investigated the electron spectrum dependence on the plasma election density in the range of 3 X 10(19)-4 X 10(20) cm(-3). The experimentally obtained results are closely reproduced by three-dimensional particle-in-cell simulations. A detailed analysis shows that the self-modulated laser wake field, although active, cannot explain the experimental energy spectrum. The bulk of the fast electrons are produced by direct laser acceleration at the channel betatron resonance.

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页码：4772 / 4775

页数：4

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