Laser acceleration of high-energy protons in variable density plasmas

被引：31

作者：

Antici, P. ^{[1
,2
,3
,4
]}

Fuchs, J. ^{[1
]}

d'Humieres, E. ^{[5
]}

Robiche, J. ^{[1
]}

Brambrink, E. ^{[1
]}

Atzeni, S. ^{[2
,3
]}

Schiavi, A. ^{[2
,3
]}

Sentoku, Y. ^{[6
]}

Audebert, P. ^{[1
]}

Pepin, H. ^{[7
]}

机构：

[1] Ecole Polytech, CNRS, CEA, UPMC,LULI, F-91128 Palaiseau, France

[2] Univ Roma La Sapienza, Dipartimento Energet, I-00161 Rome, Italy

[3] CNISM, I-00161 Rome, Italy

[4] Ist Nazl Fis Nucl, I-00044 Frascati, Italy

[5] Ecole Polytech, Ctr Phys Theor, F-91128 Palaiseau, France

[6] Univ Nevada, Dept Phys, Reno, NV 89557 USA

[7] INRS Energie & Mat, Varennes, PQ J3X 1S2, Canada

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

ION-ACCELERATION; DRIVEN; IRRADIATION; GENERATION; TARGETS; BEAMS;

D O I：

10.1088/1367-2630/11/2/023038

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The acceleration of protons, induced by electrons generated by a short-pulse laser, is experimentally investigated when varying the density of the plasma target the laser is interacting with. The experimental results are compared with particle-in-cell (PIC) simulations for which the target conditions are inferred from hydrodynamic simulations. High-energy protons are observed only for the two extreme configurations, namely solid-density foils and near-critical-density plasmas having large gradients. Cold solid foils, however, yield the highest energy protons and best proton beam profiles. As suggested by simulations, near-critical-density plasmas could be optimized to further increase the proton energy.

引用

页数：12

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