Characterization of laser-driven proton beams from near-critical density targets using copper activation

被引：2

作者：

Willingale, L. ^{[1
]}

Nagel, S. R. ^{[2
]}

Thomas, A. G. R. ^{[1
]}

Bellei, C. ^{[2
]}

Clarke, R. J. ^{[3
]}

Dangor, A. E. ^{[4
]}

Heathcote, R. ^{[3
]}

Kaluza, M. C. ^{[5
,6
]}

Kamperidis, C. ^{[4
]}

Kneip, S. ^{[4
]}

Krushelnick, K. ^{[1
]}

Lopes, N. ^{[4
,7
]}

Mangles, S. P. D. ^{[4
]}

Nazarov, W. ^{[8
]}

Nilson, P. M. ^{[9
]}

Najmudin, Z. ^{[4
]}

机构：

[1] Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[3] Rutherford Appleton Lab, Cent Laser Facil, Chilton OX11 0QX, Oxon, England

[4] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, John Adams Inst Accelerator Sci, London SW7 2AZ, England

[5] Inst Opt & Quantenelekt, D-07743 Jena, Germany

[6] Helmholtz Inst Jena, D-07743 Jena, Germany

[7] Inst Super Tecn, GoLP, Lisbon, Portugal

[8] Univ St Andrews, High Energy Laser Mat R&D Lab, St Andrews KY16 9ST, Fife, Scotland

[9] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA

来源：

JOURNAL OF PLASMA PHYSICS | 2015年 / 81卷

基金：

英国工程与自然科学研究理事会;

关键词：

PLASMA INTERACTIONS; SOLID INTERACTIONS; GENERATION; PULSES; ION;

D O I：

10.1017/S002237781400066X

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Copper activation was used to characterize high-energy proton beam acceleration from near-critical density plasma targets. An enhancement was observed when decreasing the target density, which is indicative for an increased laser-accelerated hot electron density at the rear target-vacuum boundary. This is due to channel formation and collimation of the hot electrons inside the target. Particle-in-cell simulations support the experimental observations and show the correlation between channel depth and longitudinal electric field strength is directly correlated with the proton acceleration.

引用

页数：12

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Willingale, L., 1600, Cambridge University Press (760):
[2] Characterization of laser-driven proton beams from near-critical density targets using copper activation
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