Characterization of the ELIMED Permanent Magnets Quadrupole system prototype with laser-driven proton beams
Characterization of the ELIMED Permanent Magnets Quadrupole system prototype with laser-driven proton beams
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DOI：
10.1088/1748-0221/11/07/t07005
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发表时间：
2016-07
影响因子：
1.3
通讯作者：
F. Schillaci;L. Pommarel;F. Romano;G. Cuttone;M. Costa;D. Giove;M. Maggiore;A. Russo;V. Scuder
中科院分区：
文献类型：
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作者：
F. Schillaci;L. Pommarel;F. Romano;G. Cuttone;M. Costa;D. Giove;M. Maggiore;A. Russo;V. Scuder
近年来，激光加速器作为传统机器的替代品越来越受到关注[1]。在实际的离子加速方案中，激光驱动束的能量和角展度是束应用的主要限制因素，并且已经提出了专用束传输线的不同解决方案[2，3]。在这种情况下，INFN-LNS（Instituto Nazionale di Fisica Nucleare的Nazionali del Sud）研究人员与法国SIGMAPHI公司合作实现了永磁四极（PMQ）系统[2]，用作激光驱动质子束的收集和预选系统。该系统旨在成为一个更高性能的原型[3]，安装在ELI-Beamlines上用于收集离子。最终的系统设计用于高达60 MeV/u的质子和碳。为了验证该大口径、紧凑型、高梯度磁系统原型的设计和性能，与位于巴黎的LOA（光学光学仪器）的SAPHIR实验设施小组合作，使用200 TW钛：蓝宝石激光系统进行了一次实验活动。在这一运动的四极系统的光学进行了深入的研究，比较结果与模拟代码用于确定PMQ系统的设置和跟踪质子与现实的TNSA一样的发散和光谱。实验和仿真结果是很好的协议，证明了有一个很好的控制磁光学的可能性。在实验活动期间使用的程序和最相关的结果报告在这里。
Laser-based accelerators are gaining interest in recent years as an alternative to conventional machines [1]. In the actual ion acceleration scheme, energy and angular spread of the laser-driven beams are the main limiting factors for beam applications and different solutions for dedicated beam-transport lines have been proposed [2,3]. In this context a system of Permanent Magnet Quadrupoles (PMQs) has been realized [2] by INFN-LNS (Laboratori Nazionali del Sud of the Instituto Nazionale di Fisica Nucleare) researchers, in collaboration with SIGMAPHI company in France, to be used as a collection and pre-selection system for laser driven proton beams. This system is meant to be a prototype to a more performing one [3] to be installed at ELI-Beamlines for the collection of ions. The final system is designed for protons and carbons up to 60 MeV/u. In order to validate the design and the performances of this large bore, compact, high gradient magnetic system prototype an experimental campaign have been carried out, in collaboration with the group of the SAPHIR experimental facility at LOA (Laboratoire d'Optique Appliquée) in Paris using a 200 TW Ti:Sapphire laser system. During this campaign a deep study of the quadrupole system optics has been performed, comparing the results with the simulation codes used to determine the setup of the PMQ system and to track protons with realistic TNSA-like divergence and spectrum. Experimental and simulation results are good agreement, demonstrating the possibility to have a good control on the magnet optics. The procedure used during the experimental campaign and the most relevant results are reported here.