HLS-II直线加速器能量调节及应用

倪汪彪; 于永波; 宣科; 徐卫; 李川; 刘功发

doi:10.11884/HPLPB202335.230144

HLS-II直线加速器能量调节及应用

doi: 10.11884/HPLPB202335.230144

中国科学技术大学国家同步辐射实验室，合肥 230026

基金项目: 国家自然科学基金项目(11975227) 中国科学院合肥大科学中心项目(2019HSC-KPRD003)

详细信息

作者简介:
倪汪彪，niwangb@mail.ustc.edu.cn

通讯作者:
宣　科，xuanke@ustc.edu.cn

中图分类号: TL503.6
计量
- 文章访问数: 843
- HTML全文浏览量: 257
- PDF下载量: 84
- 被引次数: 0
出版历程
- 收稿日期: 2023-05-24
- 修回日期: 2023-07-19
- 录用日期: 2023-07-19
- 网络出版日期: 2023-07-28
- 刊出日期: 2023-09-15

Energy adjustment and application of the HLS-II linac

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China

摘要

摘要: 为了高效地对直线加速器输出束流能量进行调节，设计了合肥光源（HLS-II）直线加速器束流能量调节方案。该方案在调试阶段通过能谱分析系统观察束团状态并测量束流能量，储存环注入阶段使用3个束流位置探测器（BPM）对束流能量进行在线测量；使用自动相位扫描程序对速调管输出相位进行扫描，获得各加速段的能量增益公式；定量调节速调管的输出相位和高压，实现直线加速器输出束流能量的快速调节。在线应用结果表明，该方案能快速实现束流能量调节，调节后的束流具有良好品质，束流横向能散小于0.22%，注入速率明显改善。
- 直线加速器 /
- 能谱分析系统 /
- 束流位置探测器 /
- 自动相位扫描 /
- 能量调节
Abstract: To efficiently adjust the output beam energy of the Hefei Light Source II (HLS-II) linac, this study presents a beam energy adjustment scheme. During the debugging stage, the beam bunch state is observed, and the beam energy is measured using an energy spectrum analysis system. In the storage ring injection stage, three Beam Position Monitors (BPMs) are employed for online beam energy measurement. An automatic phase scanning program is utilized to scan the output phase of the klystrons, deriving the energy gain formula for each acceleration section. By quantitatively adjusting the output phase and high voltage of the klystrons, rapid adjustment of the output beam energy of the linac is achieved. The online application results demonstrate that the proposed scheme can swiftly adjust the beam energy, with the adjusted beam exhibiting excellent quality and a transverse energy spread of less than 0.22%. Furthermore, the implementation of this scheme significantly improves the injection rate.
- linac /
- energy spectrum analysis system /
- beam position monitor /
- automatic phase scanning /
- energy adjustment

HTML全文

图 1 HLS-II直线加速器及开关磁铁后部分元件布局图

Figure 1. Layout of the HLS-II linac and some components behind the switch magnet

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图 2 自动相位扫描程序流程图

Figure 2. Flowchart of the automatic phase scanning program

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图 3 自动相位扫描图形界面

Figure 3. Automatic phase scanning interface

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图 4 KLY7、KLY8高压与峰值加速相位的关系以及高压与最大能量增益的关系

Figure 4. Relationship between high voltage and peak acceleration phase and relationship between high voltage and maximum energy gain for KLY7 and KLY8

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图 5 相位调节示意图

Figure 5. Schematic diagram of phase adjustment

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图 6 束流能量调节前后能散对比

Figure 6. Comparison of energy spread before and after beam energy adjustment

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图 7 注入阶段开启能量调节前后束流能量与注入速率对比

Figure 7. Comparison of beam energy and injection rate before and after opening energy adjustment during injection stage

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表 1 KLY3～KLY8自动相位扫描结果

Table 1. Automatic phase scanning results of KLY3～KLY8

klystron	peak output power/MW	operating high voltage/kV	energy gain formula
KLY3	50	44	${E_3} = 97.78\cos ({\varphi _3} + 179.38^\circ )$
KLY4	50	44	${E_4} = 93.64\cos ({\varphi _4} - 173.98^\circ )$
KLY5	50	44	${E_5} = 90.66\cos ({\varphi _5} + 79.58^\circ )$
KLY6	50	44	${E_6} = 95.16\cos ({\varphi _6} + 31.04^\circ )$
KLY7	50	44	${E_7} = 96.16\cos ({\varphi _7} + 148.82^\circ )$
KLY8	80	44	${E_8} = 124.01\cos ({\varphi _8} + 38.11^\circ )$

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表 2 KLY7、KLY8高压与峰值加速相位以及高压与最大能量增益拟合结果

Table 2. Fitting results of the high voltage with peak acceleration phase and the high voltage with maximum energy gain for KLY7 and KLY8

klystron	fitting results of klystron high voltage and maximum energy gain	fitting results of klystron high voltage and peak acceleration phase
KLY7	${A_7} = 2.93{U_7} - 33.06$	${\varphi _{7\max}} = - 9.77{U_7} + 280.9$
KLY8	${A_8} = 4.95{U_8} - 96.35$	${\varphi _{8\max}} = - 10.52{U_8} + 425.8$

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