Isolated proton bunch acceleration by a petawatt laser pulse

被引：62

作者：

Hilz, P. ^{[1
]}

Ostermayr, T. M. ^{[1
,2
]}

Huebl, A. ^{[3
,4
]}

Bagnoud, V. ^{[5
,6
]}

Borm, B. ^{[7
]}

Bussmann, M. ^{[3
]}

Gallei, M. ^{[8
]}

Gebhard, J. ^{[1
]}

Haffa, D. ^{[1
]}

Hartmann, J. ^{[1
]}

Kluge, T. ^{[3
]}

Lindner, F. H. ^{[1
]}

Neumayr, P. ^{[5
]}

Schaefer, C. G. ^{[8
]}

Schramm, U. ^{[3
,4
]}

Thirolf, P. G. ^{[1
]}

Roesch, T. F. ^{[1
]}

Wagner, F. ^{[5
,6
]}

Zielbauer, B. ^{[5
]}

Schreiber, J. ^{[1
,2
]}

机构：

[1] Ludwig Maximilians Univ Munchen, Fak Phys, Munich, Germany

[2] Max Planck Inst Quantum Opt, Garching, Germany

[3] Helmholtz Zentrum Dresden Rossendorf, Dresden, Germany

[4] Tech Univ Dresden, Dresden, Germany

[5] GSI Helmholtzzentrum Schwerionenforsch, Darmstadt, Germany

[6] Helmholtz Inst Jena, Jena, Germany

[7] Goethe Univ Frankfurt, Frankfurt, Germany

[8] Tech Univ Darmstadt, Macromol Chem Dept, Darmstadt, Germany

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

关键词：

D O I：

10.1038/s41467-017-02663-1

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Often, the interpretation of experiments concerning the manipulation of the energy distribution of laser-accelerated ion bunches is complicated by the multitude of competing dynamic processes simultaneously contributing to recorded ion signals. Here we demonstrate experimentally the acceleration of a clean proton bunch. This was achieved with a microscopic and three-dimensionally confined near critical density plasma, which evolves from a 1 mu m diameter plastic sphere, which is levitated and positioned with micrometer precision in the focus of a Petawatt laser pulse. The emitted proton bunch is reproducibly observed with central energies between 20 and 40 MeV and narrow energy spread (down to 25%) showing almost no low-energetic background. Together with three-dimensional particle-in-cell simulations we track the complete acceleration process, evidencing the transition from organized acceleration to Coulomb repulsion. This reveals limitations of current high power lasers and viable paths to optimize laser-driven ion sources.

引用

页数：9

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