强流离子束DESIR冷却器的模拟计算（SPIRAL 2）
Simulations of high intensity ions beam RFQ Cooler for DESIR SPIRAL 2
摘要：
本文介绍了在SPIRAL 2/WGRR装置上安装的SHIRaC（SPIRAL-2高强度射频冷却器）项目中采用的新一代缓冲气体射频冷却器对高强度离子束的冷却模拟。研究了考虑空间电荷效应和缓冲气体扩散时冷却过程的两种模拟方法。讨论了这些效应对光束传输效率、纵向扩展能量和横向发射度的影响。最后，对强度达到1 μ A的Cs~+离子束的透射率进行了模拟和实验比较。
英文摘要：
The cooling simulation of a high intensity ions beam by a new generation of a buffer gas radio-frequency cooler within the SHIRaC (SPIRAL-2 High Intensity Radiofrequency Cooler) project, installed at the SPIRAL 2/DESIR facility, is presented. Two simulation methods for the cooling process in presence of the space charge effect and the buffer gas diffusion will be studied. The beam properties degradation in terms of the transmission efficienty, the longitudinal spread energy and the transversal emittance by these effects will be discussed. Finally, a comparison in term of transmission between simulated and experimental results for Cs+ ions beam of intensity going up to 1μA, will be outlined.
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