Numerical modeling of the Linac4 negative ion source extraction region by 3D PIC-MCC code ONIX
Numerical modeling of the Linac4 negative ion source extraction region by 3D PIC-MCC code ONIX
复制标题
通过 3D PIC-MCC 代码 ONIX 对 Linac4 负离子源提取区域进行数值建模
DOI：
10.1063/1.4792767
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
D. Steyaert
中科院分区：
文献类型：
--
作者：
S. Mochalskyy;J. Lettry;T. Minea;A. Lifschitz;C. Schmitzer;Ø. Midttun;D. Steyaert
在CERN，160 MeV H−直线加速器Linac 4需要高性能负离子（NI）源。该源计划产生80 mA的H−，发射度为0.25 mm mradN-RMS，这在技术和科学上都非常具有挑战性。NI源的优化需要深入了解有关负离子产生和提取的基础物理学。从负离子源的提取机制是复杂的，涉及磁过滤器，以冷却电子的温度。ONIX（奥赛负离子提取）代码用于解决此问题。ONIX是一个自洽的三维静电程序，使用粒子在细胞蒙特卡罗碰撞（PIC MCC）的方法。它是用来处理等离子体、源壁和引出孔处的束流形成之间的复杂边界条件的。正提取电位（25 kV）和磁场图均取自欧洲核子研究中心正在建设的实验装置。这个对照…
At CERN, a high performance negative ion (NI) source is required for the 160 MeV H− linear accelerator Linac4. The source is planned to produce 80 mA of H− with an emittance of 0.25 mm mradN-RMS which is technically and scientifically very challenging. The optimization of the NI source requires a deep understanding of the underling physics concerning the production and extraction of the negative ions. The extraction mechanism from the negative ion source is complex involving a magnetic filter in order to cool down electrons’ temperature. The ONIX (Orsay Negative Ion eXtraction) code is used to address this problem. The ONIX is a selfconsistent 3D electrostatic code using Particles-in-Cell Monte Carlo Collisions (PIC-MCC) approach. It was written to handle the complex boundary conditions between plasma, source walls, and beam formation at the extraction hole. Both, the positive extraction potential (25kV) and the magnetic field map are taken from the experimental set-up, in construction at CERN. This contr...