SDUV-FEL装置上利用电光频谱解码法测量束团长度实验设计与仿真

华连发; 张文艳; 王兴涛; 李珍; 刘波

doi:10.11889/j.0253-3219.2016.hjs.39.040102

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SDUV-FEL装置上利用电光频谱解码法测量束团长度实验设计与仿真

更新时间：2021-05-25

- SDUV-FEL装置上利用电光频谱解码法测量束团长度实验设计与仿真
- Design and simulation of bunch length measurement with electro-optical spectral decoding at SDUV-FEL
- 核技术 2016年39卷第4期文章编号：040102
- 作者机构：
  
  1.上海大学环境与化学工程学院上海 200444;
  2.中国科学院上海应用物理研究所嘉定园区上海 201800
- 作者简介：
  
  华连发,男,1990年出生,2013年毕业于南华大学,现为硕士研究生,研究领域为加速器束流诊断
  李珍,E-mail:lizhen@shu.edu.cn
  刘波,E-mail:liubo@sinap.ac.cn
- 基金信息：
  
  国家自然科学基金(No.11322550)资助 Supported by National Natural Science Foundation of China (No.11322550)()
- DOI：10.11889/j.0253-3219.2016.hjs.39.040102
  中图分类号： TL506
- 收稿日期：2016-01-20，
  
  录用日期：2016-03-08，
  
  纸质出版日期：2016-01-25
- 稿件说明：
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华连发, 张文艳, 王兴涛, 等. SDUV-FEL装置上利用电光频谱解码法测量束团长度实验设计与仿真[J]. 核技术, 2016,39(4):040102

Lianfa HUA, Wenyan ZHANG, Xingtao WANG, et al. Design and simulation of bunch length measurement with electro-optical spectral decoding at SDUV-FEL[J]. Nuclear techniques, 2016, 39(4): 040102
华连发, 张文艳, 王兴涛, 等. SDUV-FEL装置上利用电光频谱解码法测量束团长度实验设计与仿真[J]. 核技术, 2016,39(4):040102 DOI： 10.11889/j.0253-3219.2016.hjs.39.040102.

Lianfa HUA, Wenyan ZHANG, Xingtao WANG, et al. Design and simulation of bunch length measurement with electro-optical spectral decoding at SDUV-FEL[J]. Nuclear techniques, 2016, 39(4): 040102 DOI： 10.11889/j.0253-3219.2016.hjs.39.040102.

摘要

电子束团纵向长度是束流诊断中的重要参数

电光频谱解码法(Electro-Optical Spectral Decoding

EOSD)是为数不多的可进行单发测量的高时间分辨率测量方法。本文基于上海深紫外自由电子激光装置(Shanghai Deep Ultraviolet Free Electron Laser

SDUV-FEL)设计了一套电光频谱解码法测量束团长度实验方案。通过采用针尖粗同步和可调的光栅展宽器可实现长度在1-10 ps内变化的束团无损测量。通过对电光调制过程及其后探测的仿真研究表明

选用0.5 mm厚的ZnTe晶体在距离束流中心3-5 mm处测量时

时间分辨率最高可达180fs(Root Mean Square

RMS)

信号展宽在3%以内

测量的电场形状无可观测畸变

满足SDUV-FEL的实验需求。

Abstract

Background:

The longitudinal length of electron bunch is an important parameter in beam diagnostics. Electro-Optical Spectral Decoding(EOSD) is one of the few powerful approaches to accurately measure bunches down to sub-picosecond level.

Purpose:

This study aims to design and evaluate a complete system to measure the bunch length at Shanghai Deep Ultraviolet Free Electron Laser(SDUV-FEL).

Methods:

The EOSD with a probe used for coarse synchronization and a tunable grating pair used as laser stretcher was designed

and the processes of Electro-Optical modulation and detection were simulated in detail.

Results:

The bunch length varying from 1 ps to 10ps can be measured without beam destruction in the whole process. The time resolution(Root Mean Square

RMS) is expected up to 180 fs at best and signal broadening within 3%.

Conclusion:

The longitudinal bunch length can be measured with high quality utilizing our EOSD setup. The system can meet the demands of SDUV-FEL.

关键词

Keywords

references

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