Döpp A, Guillaume E, Thaury C, Gautier J, Ta Phuoc K, Malka V
LOA, ENSTA ParisTech, CNRS, École Polytechnique, Université Paris-Saclay, 828 Boulevard des Maréchaux, 91762 Palaiseau Cedex, France.
Rev Sci Instrum. 2016 Jul;87(7):073505. doi: 10.1063/1.4958649.
Recent results on laser wakefield acceleration in tailored plasma channels have underlined the importance of controlling the density profile of the gas target. In particular, it was reported that the appropriate density tailoring can result in improved injection, acceleration, and collimation of laser-accelerated electron beams. To achieve such profiles, innovative target designs are required. For this purpose, we have reviewed the usage of additive layer manufacturing, commonly known as 3D printing, in order to produce gas jet nozzles. Notably we have compared the performance of two industry standard techniques, namely, selective laser sintering (SLS) and stereolithography (SLA). Furthermore we have used the common fused deposition modeling to reproduce basic gas jet designs and used SLA and SLS for more sophisticated nozzle designs. The nozzles are characterized interferometrically and used for electron acceleration experiments with the Salle Jaune terawatt laser at Laboratoire d'Optique Appliquée.
近期在定制等离子体通道中进行激光尾场加速的研究结果凸显了控制气体靶密度分布的重要性。特别是，有报道称，合适的密度定制可改善激光加速电子束的注入、加速和准直。为实现这种分布，需要创新的靶设计。为此，我们回顾了增材制造（通常称为3D打印）在制造气体喷嘴方面的应用。值得注意的是，我们比较了两种行业标准技术，即选择性激光烧结（SLS）和立体光刻（SLA）的性能。此外，我们使用普通的熔融沉积建模来重现基本的气体喷嘴设计，并使用SLA和SLS来设计更复杂的喷嘴。通过干涉测量对这些喷嘴进行表征，并将其用于应用光学实验室的“黄色大厅”太瓦激光进行的电子加速实验。
