| 合肥光源逐圈束流位置监测系统中的定时系统 |
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| 引用本文： | 邱爱慈,张永民,黄建军,郑建伟,彭建昌,汤俊萍,杨海亮,丁升.合肥光源逐圈束流位置监测系统中的定时系统[J].强激光与粒子束,2003,15(5):0-493. |
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| 作者姓名： | 邱爱慈 张永民 黄建军 郑建伟 彭建昌 汤俊萍 杨海亮 丁升 |
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| 作者单位： | 1.中国科学技术大学 近代物理系,安徽 合肥 230027; |
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| 基金项目： | 国防科技基础研究基金资助课题(96J11.7.1) |
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| 摘 要： | 定时系统是合肥光源逐圈束流位置监测和相空间测量系统中的重要组成部分，其主要目的是为数据采集卡提供与环内电子束团同步的时钟信号。该系统包含高速ECL时钟成形、分频电路、程控延时电路、控制模块等部分。可实现延时范围0～220ns，最小延时步距0.5ns，调整精度0.1ns，时钟抖动小于200ps。系统控制软件基于客户/服务器结构，操作灵活、方便。
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| 关 键 词： | 逐圈束流位置测量 程控延时 时钟抖动 客户/服务器结构 |
| 文章编号： | 1001-4322(2003)05-0489-05 |
| 收稿时间： | 2002/8/29 |
| 修稿时间： | 2002年8月29日 |
Several diagnostic methods for high fluence electron beam parameters |
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| qiu ai-ci,zhang yong-min,huang jian-jun,zheng jian-wei,peng jian-chang,tang jun-ping,yang hai-liang,ding sheng.Several diagnostic methods for high fluence electron beam parameters[J].High Power Laser and Particle Beams,2003,15(5):0-493. |
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| Authors: | qiu ai-ci zhang yong-min huang jian-jun zheng jian-wei peng jian-chang tang jun-ping yang hai-liang ding sheng |
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| Institution: | 1.Department of Modern Physics,University of Science and Technology of China,P.O.Box 4,Hefei 230027,China;2.National Synchroron Radiation Laboratory,University of Scicence and Technology of China,P.O.Box 6022,Hefei,230029,China |
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| Abstract: | After briefly analyzing the technical difficulties of diagnosing high fluence electron beam, three new methods for diagnosing parameters, including filtered Farady cup for measurement of the electron transient effective incident angle, Farady multi-cup for measurement of the time-resolved current density and graphite calorimeter for measuring the total beam energy with correction, are presented. In the condition of space voltage 1.08 MV and current 484 kA on the diode of flash-2 accelerator, in the distance 20.5 cm from cathode total beam energy is 19.1 kJ, and 22 kJ after correction. Measurement of radial and azimuthal current density on the beam cross-section in different time and energy fluence on beam spot center with 13% more than its average value for the beam is also presented. In the condition of magnetic lens ratio 3.5, on the moment of voltage peak 1.2 MV average electron incident angle of 73° is measured. It's shown by experiment and calculation that the main factories of influence on average electron incident angle are electron energy, magnetic lens ratio and target position. |
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| Keywords: | High fluence electron beam measurement Electron beam incident angle Calorimeter Beam density |
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