HLS Ⅱ储存环条带束流位置检测器的离线标定

吴芳芳; 周泽然; 孙葆根; 杨永良; 卢平; 栗武斌; 马天骥; 邹俊颖; 程超才

doi:doi:10.3788/hplpb20132511.2971

强激光与粒子束, 2013, 25 (11): 2971, 网络出版: 2013-11-14

HLS Ⅱ储存环条带束流位置检测器的离线标定

Offline calibration of stripline beam position monitor for HLS Ⅱ

论文大纲

吴芳芳 ^*周泽然孙葆根杨永良卢平栗武斌马天骥邹俊颖程超才

作者单位

中国科学技术大学核科学技术学院, 国家同步辐射实验室, 合肥 230029

条带束流位置检测器差比和法高斯加权法横向四极分量 stripline beam position monitor difference/sum method Gaussian weighted method transverse quadrupole component

摘要

针对合肥光源二期改造工程设计了一条带束流位置检测器(BPM), 用于储存环中束流参数在线测量。对条带BPM进行了位置信号的离线标定，采用差比和法和对数比法进行计算，获得了灵敏度系数、映射图和拟合经验多项式，发现采用对数比法得到的灵敏度大小和线性范围好于差比和法。对和信号进行离线标定，发现和信号相对中心位置处的归一化值在(-5 mm, -5 mm)到(5 mm, 5 mm)范围内变化不超过±6%。该条带BPM也用来测量合肥光源储存环上束团横向四极振荡，所以需对横向四极分量进行标定。采用二维网格结构高斯加权法模拟高斯束团，使用差比和法进行计算，并将测量结果与模拟结果比较，发现横向四极分量随 (σx2-σy2)线性变化的灵敏度与模拟结果相同，均为0.001 1 mm-2。得到的拟合经验公式用于在线测量。

Abstract

A stripline beam position monitor(BPM) was designed for HLS Ⅱ upgraded and used to measure beam parameters in the HLS storage ring. Position signal was offline calibrated using the difference/sum and log-ratio methods. Sensitivities, mapping figures and experienced fitting polynomials were acquired. The results showed that the sensitivities and linear range using log-ratio method were bigger than those using difference/sum method. The sum signal was offline calibrated and the result showed that the variety of normalized sum signal relative to the sum signal at the stripline BPM center was no more than ±6 % in the range of (-5 mm, -5 mm) to (5 mm, 5 mm). The stripline BPM will be also used to measure the transverse quadrupole oscillation in the HLS storage ring, so calibrating transverse quadrupole component is needed. The Gaussian weighted method of a two-dimensional grid structure was used to simulate the Gaussian bunch and the difference/sum method was applied to calculate transverse quadrupole component. The measurement result was compared with the simulation result. The result showed that the sensitivity of the transverse quadrupole component varying with (σ2x-σ2y) by offline method was the same as simulation result and sensitivity was 0.001 1 mm-2. Experienced fitting polynomial was calculated to be used for the future online measurement.

参考文献

[1] Wu Fangfang, Zhou Zeran, Sun Baogen, et al.Design and simulation of the stripline transverse quadrupole kicker for HLS Ⅱ ［C］//Proceedings of IPAC2012.2012:2852-2854.

[2] Sakanaka S, Kobayashi Y, Mitsuhashi T, et al. Excitation and detection of a transverse quadrupole-mode bunch oscillation in the KEK photon factory storage ring［J］. Jpn J Appl Phys, 2003, 42(4):1757-1762.

[3] Sakanaka S, Mitsuhashi T, Obina T, et al. Measurement of the transverse quadrupole-mode frequencies of an electron bunch in the KEK photon factory storage ring［C］//Proceedings of PAC2003. 2003:3207-3209.

[4] Deibele C, Kurennoy S.Matching BPM stripline electrodes to cables and electronics［C］//Proceedings of PAC2005.2005:2607-2609.

[5] 李吉浩, 孙葆根, 何多慧, 等.合肥光源直线加速器BPM系统的研制和测量［J］.高能物理与核物理, 2007, 31(1): 96-100.(Li Jihao, Sun Baogen, He Duohui, et al. Research and measurement of BPM system at HLS Linac. High Energy Physics and Nuclear Physics, 2007, 31(1):96-100)

[6] 马天骥, 孙葆根, 杨永良, 等.合肥光源纽扣型束流位置检测器的设计计算［J］.原子能科学技术, 2010, 44(sl): 517-521.(Ma Tianji, Sun Baogen, Yang Yongliang, et al. Design of button beam position monitor for Hefei Light Source. Atomic Energy Science and Techlogy, 2010, 44(sl): 517-521)

[7] Olmos A, Pérez F, Rehm G. Matlab code for BPM button geometry computation［C］//Proceedings of DIPAC2007.2007: 186-188.

[8] Olmos A, Günzel T, Pérez F, et al. BPM design for the ALBA Synchrotron［C］//Proceedings of EPAC2006.2006:1190-1192.

[9] 张佰春, 冷用斌.束流位置探头用于束团电荷量测量的数值仿真研究［J］.核技术，2009, 32(4): 256-259.(Zhang Baichun, Leng Yongbin. Simulation of beam bunch charge measurement using BPM pickup. Nuclear Techniques, 2009, 32(4): 256-259)

[10] Russell J S, Gilpatrick D J, Power J F, et al.Characterization of beam position monitors for measurement of second moment［C］//Proceedings of PAC1995.1995:2577-2579.

[11] 方佳, 孙葆根, 杨永良, 等.八电极束流能散检测器的计算与标定［J］.强激光与粒子束, 2011, 23(12)：3372-3376.(Fang Jia, Sun Baogen, Yang Yongliang, et al. Calculation and calibration of eight-stripline beam energy spread monitor.High Power Laser and Particle Beams, 2011, 23(12): 3372-3376)

吴芳芳, 周泽然, 孙葆根, 杨永良, 卢平, 栗武斌, 马天骥, 邹俊颖, 程超才. HLS Ⅱ储存环条带束流位置检测器的离线标定[J]. 强激光与粒子束, 2013, 25(11): 2971. Wu Fangfang, Zhou Zeran, Sun Baogen, Yang Yongliang, Lu Ping, Li Wubin, Ma Tianji, Zou Junying, Cheng Chaocai. Offline calibration of stripline beam position monitor for HLS Ⅱ[J]. High Power Laser and Particle Beams, 2013, 25(11): 2971.

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