一种高重频废束桶束窗的设计及热结构分析

张浩; 黄礼明; 赵峰; 林涵文; 常仁超; 魏建平; 鄂得俊; 尉伟; 陶凯; 杨家岳; 张未卿

doi:10.11884/HPLPB202335.220350

一种高重频废束桶束窗的设计及热结构分析

doi: 10.11884/HPLPB202335.220350

1.
深圳综合粒子设施研究院，广东深圳 518107
2.
中国科学院大连化学物理研究所，辽宁大连 116023

基金项目: 深圳市科技计划资助项目(JCYJ20220530140807017)

详细信息

作者简介:
张　浩，zhanghao@mail.iasf.ac.cn

通讯作者:
尉　伟，weiwei@mail.iasf.ac.cn

中图分类号: TL503.1
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- 被引次数: 0
出版历程
- 收稿日期: 2022-10-20
- 修回日期: 2022-11-30
- 网络出版日期: 2022-12-03
- 刊出日期: 2023-03-01

Design and thermal structure analysis of a dump beam window for high repetition frequency

1.
Institute of Advanced Science Facilities, Shenzhen 518107, China
2.
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

摘要

摘要: 深圳中能高重频X射线自由电子激光（S³FEL）将建设成为全球唯一软X射线波段的高重频自由电子激光。废束桶是S³FEL装置的重要设备，在系统调束中发挥着重要作用。废束桶束窗是废束桶的重要组成部件，用于隔离和保护加速器超高真空环境。本文对几种常用的废束桶束窗材料进行了对比分析，最终选择铍作为束窗的材料，并依此设计了一种带有水冷结构的束窗。通过蒙特卡罗方法计算得到不同厚度束窗的沉积功率，采用有限元分析方法对不同厚度的束窗进行热结构计算与分析，得到厚度为1.6 mm的水冷铍窗效果最佳，其最大温度为121.6 ℃，低真空为1 Pa时的最大应力与中心变形分别为198.7 MPa和0.00082 mm，低真空为101325 Pa时的最大应力与中心变形分别为204.2 MPa和0.097 mm，结果均满足使用要求。此研究为S³FEL的废束桶束窗设计提供了重要的理论依据。
- 自由电子激光 /
- 高重频 /
- 废束桶 /
- 束窗 /
- 有限元分析
Abstract: Shenzhen Superconducting Soft X-ray Free Electron Laser (S³FEL) will be the only high refrequency free electron laser in soft X-ray band in the world. Dump, playing an important role in system beam tuning, is an important equipment of S³FEL device. As an important component of dump, dump beam window is used to isolate and protect the ultra-high vacuum environment of the accelerator. In this paper, several commonly used materials for dump beam window are compared and analyzed, beryllium is finally chosen as the material. A dump beam window with water-cooled structure is designed using to beryllium. The deposition power of beam window with different thickness is calculated by Monte Carlo method. The thermal-mechanical simulations based on the finite element analysis method show that the water-cooled beryllium window with a thickness of 1.6 mm is the best and meet the application requirements. Its maximum temperature is 121.6 ℃. The maximum stress and central deformation at low vacuum of 1 Pa are 198.7 MPa and 0.000 82 mm respectively. The maximum stress and central deformation at low vacuum of 101 325 Pa are 204.2 MPa and 0.097 mm respectively. The present study provides a critical theoretical basis for the design of dump beam window in S³FEL.
- free electron laser /
- high repetition frequency /
- dump /
- beam window /
- finite element analysis

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图 1 束窗模型

Figure 1. Model of beam window

下载: 全尺寸图片幻灯片

图 2 铍窗沉积功率

Figure 2. Deposition power of beryllium window

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图 3 束窗简化模型

Figure 3. Simplified model of beryllium window

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图 4 1 mm铍窗的温度与应力

Figure 4. Temperature and stress of 1 mm beryllium window

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图 5 不同厚度铍窗的最大温度、最大应力和中心变形

Figure 5. Maximum temperature，maximum stress and center deformation beryllium window with different thickness

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图 6 1.6 mm铍窗的温度、应力和中心变形

Figure 6. Temperature, stress and central deformation of 1.6 mm beryllium window

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表 1 材料物性参数

Table 1. Material physical parameters

material	density/ (kg·m⁻³)	elastic modulus/ GPa	Poisson’s ratio	yield stress/ MPa	thermal conductivity/ (W·m⁻¹·K⁻¹)	thermal expansion coefficient/℃⁻¹
Ti-6Al-4V	4430	113.8	0.360	880	6.7	8.6×10⁻⁶
A5083	2660	71.0	0.330	145	117.0	23.0×10⁻⁶
316L	7980	193.0	0.300	290	15.0	12.0×10⁻⁶
OFHC	8940	115.0	0.343	340	391.0	17.7×10⁻⁶
Be	1844	303.0	0.100	240/345	216.0	12.0×10⁻⁶

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