Depressing the HOM heating on in-vacuum wiggler with an in-vacuum beam pipe 真空内扭摆磁铁的内真空盒对高次模发热的抑制作用
The mathematical models for fluid flow and heat transfer were built based the working conditions of the beam pipe in this paper. The finite element method was used to calculate the cooling parameters for the centre beryllium pipe and the extension copper pipes, respectively. 根据束流管的工作条件,本文建立了三维流体流动传热数学模型,采用有限元方法对中心铍管与外延铜管的冷却参数分别进行了数值计算。
It is easy and accurate to adjust the relationship between the beam pipe and the magnet. 束管和磁体相对位置的调整简便准确。
Considering the ten years designed lives of the beam pipe, The spark machining oil no. 1 with little erodibility to beryllium was selected to cool the centre beryllium pipe and the de-ionized water was adopted to cool the extension copper pipes. 考虑到束流管的设计使用寿命为10年,选择了对金属铍腐蚀性很小的1号电火花油对中心铍管进行冷却,采用去离子水对外延铜管冷却。
Thus the cooling structure was in reason. The thermal controlling finite element model for the beam pipe was built according to the real material and size of the beam pipe model. 根据束流管模型件的实际尺寸及材料,建立了束流管热控制整体有限元模型。