Laser-driven high-energy proton beam with homogeneous spatial profile from a nanosphere target

被引：47

作者：

Margarone, D. ^{[1
]}

Kim, I. J. ^{[2
,3
]}

Psikal, J. ^{[1
,4
]}

Kaufman, J. ^{[1
,4
]}

Mocek, T. ^{[5
]}

Choi, I. W. ^{[2
,3
]}

Stolcova, L. ^{[1
,4
]}

Proska, J. ^{[4
]}

Choukourov, A. ^{[1
,6
]}

Melnichuk, I. ^{[6
]}

Klimo, O. ^{[1
,4
]}

Limpouch, J. ^{[1
,4
]}

Sung, J. H. ^{[2
,3
]}

Lee, S. K. ^{[2
,3
]}

Korn, G. ^{[1
]}

Jeong, T. M. ^{[2
,3
]}

机构：

[1] Inst Phys ASCR, ELI Beamlines Project, Vvi FZU, Prague 18221, Czech Republic

[2] Inst Basic Sci, Ctr Relativist Laser Sci, Gwangju 500712, South Korea

[3] GIST, Adv Photon Res Inst, Gwangju 500712, South Korea

[4] Czech Tech Univ, FNSPE, Prague 11519, Czech Republic

[5] ASCR, Inst Phys, HiLASE Project, Prague 18221, Czech Republic

[6] Charles Univ Prague, Dept Macromol Phys, Fac Math & Phys, CR-11636 Prague 1, Czech Republic

来源：

PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS | 2015年 / 18卷 / 07期

关键词：

PETAWATT-LASER; ACCELERATION; SPECTROSCOPY;

D O I：

10.1103/PhysRevSTAB.18.071304

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：

A high-energy, high-yield proton beam with a good homogeneous profile has been generated from a nanosphere target irradiated by a short (30-fs), intense (7 x 10(20) W/cm(2)) laser pulse. A maximum proton energy of 30 MeV has been observed with a high proton number of 7 x 10(10) in the energy range 5-30 MeV. A homogeneous spatial profile with a uniformity (standard deviation from an average value within 85% beam area) of 15% is observed with the nanosphere dielectric target. Particle-in-cell simulations show the enhancement of proton cutoff energy and proton number with the nanosphere target and reveal that the homogeneous beam profile is related with a broadened angular distribution of hot electrons, which is initiated by the nanosphere structure. The homogeneous spatial properties obtained with the nanosphere target will be advantageous in developing laser-driven proton sources for practical applications in which high-quality beams are required.

引用

页数：7

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