Chen S N, Gauthier M, Higginson D P, Dorard S, Mangia F, Riquier R, Atzeni S, Marquès J-R, Fuchs J
LULI, École Polytechnique, CNRS, CEA, UPMC, 91128 Palaiseau, France.
Dipartimento SBAI, Università di Roma "La Sapienza," Roma, Italy.
Rev Sci Instrum. 2014 Apr;85(4):043504. doi: 10.1063/1.4870250.
High-intensity laser accelerated protons and ions are emerging sources with complementary characteristics to those of conventional sources, namely high charge, high current, and short bunch duration, and therefore can be useful for dedicated applications. However, these beams exhibit a broadband energy spectrum when, for some experiments, monoenergetic beams are required. We present here an adaptation of conventional chicane devices in a compact form (10 cm × 20 cm) which enables selection of a specific energy interval from the broadband spectrum. This is achieved by employing magnetic fields to bend the trajectory of the laser produced proton beam through two slits in order to select the minimum and maximum beam energy. The device enables a production of a high current, short duration source with a reproducible output spectrum from short pulse laser produced charged particle beams.
高强度激光加速的质子和离子是一种新兴的粒子源，具有与传统源互补的特性，即高电荷、高电流和短脉冲持续时间，因此可用于特定应用。然而，当某些实验需要单能束时，这些束流呈现出宽带能谱。我们在此展示了一种紧凑型（10厘米×20厘米）的传统弯道装置的改进形式，它能够从宽带谱中选择特定的能量区间。这是通过利用磁场使激光产生的质子束轨迹通过两个狭缝来实现的，以便选择束流的最小和最大能量。该装置能够从短脉冲激光产生的带电粒子束中产生具有可重复输出谱的高电流、短持续时间的源。
