Demonstration of passive plasma lensing of a laser wakefield accelerated electron bunch

被引：24

作者：

Kuschel, S. ^{[1
,2
]}

Hollatz, D. ^{[1
,2
]}

Heinemann, T. ^{[3
]}

Karger, O. ^{[3
]}

Schwab, M. B. ^{[1
]}

Ullmann, D. ^{[1
]}

Knetsch, A. ^{[3
]}

Seidel, A. ^{[1
]}

Roedel, C. ^{[1
,4
]}

Yeung, M. ^{[2
]}

Leier, M. ^{[1
]}

Blinne, A. ^{[2
,5
]}

Ding, H. ^{[6
]}

Kurz, T. ^{[6
]}

Corvan, D. J. ^{[7
]}

Saevert, A. ^{[1
]}

Karsch, S. ^{[6
]}

Kaluza, M. C. ^{[1
,2
]}

Hidding, B. ^{[3
,8
]}

Zepf, M. ^{[1
,2
,7
]}

机构：

[1] Univ Jena, Inst Opt & Quantum Elect, Max Wien Pl 1, D-07743 Jena, Germany

[2] Helmholtz Inst Jena, Frobelstieg 3, D-07743 Jena, Germany

[3] Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany

[4] SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[5] Univ Jena, Inst Theoret Phys, Max Wien Pl 1, D-07743 Jena, Germany

[6] Univ Munich, Coulombwall 1, D-85748 Garching, Germany

[7] Queens Univ, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland

[8] Univ Strathclyde, Dept Phys, SUPA, Glasgow G4 0NG, Lanark, Scotland

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2016年 / 19卷 / 07期

关键词：

DRIVEN; BEAM;

D O I：

10.1103/PhysRevAccelBeams.19.071301

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We report on the first demonstration of passive all-optical plasma lensing using a two-stage setup. An intense femtosecond laser accelerates electrons in a laser wakefield accelerator (LWFA) to 100 MeV over millimeter length scales. By adding a second gas target behind the initial LWFA stage we introduce a robust and independently tunable plasma lens. We observe a density dependent reduction of the LWFA electron beam divergence from an initial value of 2.3 mrad, down to 1.4 mrad (rms), when the plasma lens is in operation. Such a plasma lens provides a simple and compact approach for divergence reduction well matched to the mm-scale length of the LWFA accelerator. The focusing forces are provided solely by the plasma and driven by the bunch itself only, making this a highly useful and conceptually new approach to electron beam focusing. Possible applications of this lens are not limited to laser plasma accelerators. Since no active driver is needed the passive plasma lens is also suited for high repetition rate focusing of electron bunches. Its understanding is also required for modeling the evolution of the driving particle bunch in particle driven wake field acceleration.

引用

页数：9

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