High energy conversion efficiency in laser-proton acceleration by controlling laser-energy deposition onto thin foil targets

被引：64

作者：

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

Robinson, A. P. L. ^{[2
]}

Markey, K. ^{[2
]}

Scott, R. H. H. ^{[2
]}

Gray, R. J. ^{[1
]}

Rosinski, M. ^{[3
]}

Deppert, O. ^{[4
]}

Badziak, J. ^{[3
]}

Batani, D. ^{[5
]}

Davies, J. R. ^{[6
]}

Hassan, S. M. ^{[7
]}

Lancaster, K. L. ^{[2
]}

Li, K. ^{[8
]}

Musgrave, I. O. ^{[2
]}

Norreys, P. A. ^{[2
,9
]}

Pasley, J. ^{[2
,10
]}

Roth, M. ^{[11
]}

Schlenvoigt, H. -P. ^{[12
]}

Spindloe, C. ^{[2
]}

Tatarakis, M. ^{[7
]}

Winstone, T. ^{[2
]}

Wolowski, J. ^{[3
]}

Wyatt, D. ^{[2
]}

McKenna, P. ^{[1
]}

Neely, D. ^{[2
]}

机构：

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

[2] Rutherford Appleton Lab, STFC, Cent Laser Facil, Didcot OX11 0QX, Oxon, England

[3] Inst Plasma Phys & Laser Microfus, PL-00908 Warsaw, Poland

[4] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[5] Univ Milano Bicocca, Dipartimento Fis G Occhialini, I-20126 Milan, Italy

[6] Univ Rochester, Fus Sci Ctr Extreme States Matter, Laser Energet Lab, Rochester, NY 14623 USA

[7] Ctr Plasma Phys & Lasers, Dept Elect Engn, Rethimnon 74100, Crete, Greece

[8] Inst Super Tecn, Inst Plasmas & Fusao Nucl, GoLP, Lab Associado, P-1049001 Lisbon, Portugal

[9] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2BZ, England

[10] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[11] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[12] Ecole Polytech, LULI, F-91128 Palaiseau, France

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 08期

基金：

英国工程与自然科学研究理事会; 英国科学技术设施理事会;

关键词：

BEAMS; IRRADIATION; GENERATION; DRIVEN; PULSES; SOLIDS;

D O I：

10.1063/1.4865812

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An all-optical approach to laser-proton acceleration enhancement is investigated using the simplest of target designs to demonstrate application-relevant levels of energy conversion efficiency between laser and protons. Controlled deposition of laser energy, in the form of a double-pulse temporal envelope, is investigated in combination with thin foil targets in which recirculation of laser-accelerated electrons can lead to optimal conditions for coupling laser drive energy into the proton beam. This approach is shown to deliver a substantial enhancement in the coupling of laser energy to 5-30 MeV protons, compared to single pulse irradiation, reaching a record high 15% conversion efficiency with a temporal separation of 1 ps between the two pulses and a 5 mu m-thick Au foil. A 1D simulation code is used to support and explain the origin of the observation of an optimum pulse separation of similar to 1 ps. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

引用

页数：5

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