Dynamic control of laser driven proton beams by exploiting self-generated, ultrashort electromagnetic pulses

被引：18

作者：

Kar, S. ^{[1
]}

Ahmed, H. ^{[1
]}

Nersisyan, G. ^{[1
]}

Brauckmann, S. ^{[2
]}

Hanton, F. ^{[1
]}

Giesecke, A. L. ^{[2
]}

Naughton, K. ^{[1
]}

Willi, O. ^{[2
]}

Lewis, C. L. S. ^{[1
]}

Borghesi, M. ^{[1
]}

机构：

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

[2] Univ Dusseldorf, Inst Laser & Plasmaphys, Dusseldorf, Germany

来源：

PHYSICS OF PLASMAS | 2016年 / 23卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

ACCELERATION;

D O I：

10.1063/1.4948725

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：

As part of the ultrafast charge dynamics initiated by high intensity laser irradiations of solid targets, high amplitude EM pulses propagate away from the interaction point and are transported along any stalks and wires attached to the target. The propagation of these high amplitude pulses along a thin wire connected to a laser irradiated target was diagnosed via the proton radiography technique, measuring a pulse duration of similar to 20 ps and a pulse velocity close to the speed of light. The strong electric field associated with the EM pulse can be exploited for controlling dynamically the proton beams produced from a laser-driven source. Chromatic divergence control of broadband laser driven protons (upto 75% reduction in divergence of >5 MeV protons) was obtained by winding the supporting wire around the proton beam axis to create a helical coil structure. In addition to providing focussing and energy selection, the technique has the potential to post-accelerate the transiting protons by the longitudinal component of the curved electric field lines produced by the helical coil lens. Published by AIP Publishing.

引用

页数：6