Application of the extreme value theory to beam loss estimates in the SPIRAL2 linac based on large scale Monte Carlo computations
Application of the extreme value theory to beam loss estimates in the SPIRAL2 linac based on large scale Monte Carlo computations
复制标题
基于大规模蒙特卡罗计算的极值理论在 SPIRAL2 直线加速器中梁损耗估计中的应用
DOI：
10.1103/physrevstab.9.044202
复制
发表时间：
2006
影响因子：
--
通讯作者：
D. Uriot
中科院分区：
文献类型：
--
作者：
R. Duperrier;D. Uriot
考虑了高强度加速器元件的随机扰动对束流损失的影响。本文对SPIRAL2直线加速器进行了误差灵敏度研究，以确定其结构公差。该驱动器的目标是将5 mA的重离子束流加速到20A MeV，将Q/A=1/3的1 mA离子束加速到14.5A MeV。它是一种连续波直线加速器，旨在最大限度地提高传输强流和可调能量的效率。极值理论被用来估计期望的束流损失。所描述的方法耦合大规模计算以获得概率分布函数。Bootstrap技术用于提供与波束损失预测相关的置信度区间。使用这种方法，可以测量在这种高功率直线加速器(高达200千瓦)中丢失几瓦的风险。
The influence of random perturbations of high intensity accelerator elements on the beam losses is considered. This paper presents the error sensitivity study which has been performed for the SPIRAL2 linac in order to define the tolerances for the construction. The proposed driver aims to accelerate a 5 mA deuteron beam up to 20 A.MeV and a 1 mA ion beam for q/A = 1/3 up to 14.5 A.MeV. It is a CW linac, designed for a maximum efficiency in the transmission of intense beams and a tunable energy. The Extreme Value Theory is used to estimate the expected beam losses. The described method couples large scale computations to obtain probability distribution functions. The bootstrap technique is used to provide confidence intervals associated to the beam loss predictions. With such a method, it is possible to measure the risk to loose a few watts in this high power linac (up to 200 kW).