Design of the 7MeV Linac Injector for the 200MeV Synchrotron of the Xi'an Proton Application Facility
Design of the 7MeV Linac Injector for the 200MeV Synchrotron of the Xi'an Proton Application Facility
复制标题
西安质子应用装置200MeV同步加速器7MeV直线加速器注入器设计
DOI：
10.18429/jacow-ipac2016-mopmw014
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Shu
中科院分区：
文献类型：
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作者：
Q. Xing;Cheng Cheng;C. Du;L. Du;T. Du;W. Guan;X. Guan;Yu He;Hongping Jiang;Jian Li;Chuanxiang Tang;R. Tang;Baichuan Wang;Dan Wang;Xuewu Wang;Zhongming Wang;Lin Wu;Wen;Ye Yang;Huayi Zhang;Qingzhu Zhang;Chen Zhao;Shu
本文介绍了西安质子应用装置（XiPAF）下游同步加速器的负氢离子束注入用7 MeV直线加速器的设计结果。这个新设计的装置将位于西安市，为单粒子效应研究提供最大能量为230 MeV的质子束流。7 MeV直线加速器注入器由50 keV负氢离子源、低能束流传输线（LEBT）、3 MeV四叶片式射频四极（FRF）加速器、7 MeV Alvarez型漂移管直线加速器（DTL）和相应的射频电源系统组成。直线加速器注入器输出束流的峰值电流为5 mA，最大重复频率为0.5Hz，束流脉宽为10~40 s，均方根归一化发射度为0.24mm·mard。为满足空间辐射环境实验模拟，特别是单粒子效应研究的需要，西安质子应用装置（XiPAF）项目正在中国西安市建设。该装置主要由一个7 MeV的H直线加速器注入器（图1），一个中能束流传输线（MEBT），一个200 MeV的六倍同步加速器，两个高能束流传输线（HBT）和两个实验站组成。设计了10~10 p/cm/s的光通量，在1cm × 1cm ~ 10 cm× 10 cm范围内，样品的非均匀性优于±10%。同步加速器将以慢引出模式运行，以提供脉冲宽度为1~10 s的质子束。设计的同步加速器每个脉冲中的累积质子数为1×10。因此，7 MeV的注入能量被确定为既实现同步加速器中的累积粒子又限制直线加速器注入器的成本。负氢离子束被解束以减小能量扩散并被带注入同步加速器。直线加速器注入器的参数要求见表1。本文介绍了中国西安科学院230 MeV同步加速器7 MeV直线加速器注入器的设计结果。表1：直线加速器注入器对XiPAF参数值单元的要求
We present, in this paper, the design result of the 7 MeV linac which will inject the negative hydrogen ion beam to the downsteam synchrotron of the Xi`an Proton Application Facility (XiPAF). This newly designed facility will be located in Xi’an city and provide the proton beam with the maximum energy of 230 MeV for the research of the single event effect. The 7 MeV linac injector is composed of the 50 keV negative hydrogen ion source, Low Energy Beam Transport line (LEBT), 3 MeV four-vane type Radio Frequency Quadrupole (RFQ) accelerator, 7 MeV Alvarez-type Drift Tube Linac (DTL), and the corresponding RF power source system. The output beam of the linac injector is designed with the peak current of 5 mA, maximum repetition frequency of 0.5 Hz, beam pulse width of 10~40 s and RMS normalized emittance of 0.24 mm•mard. INTRODUCTION To fulfill the need of the experimental simulation of the space radiation environment, especially the investigation of the single event effect, the project of Xi`an Proton Application Facility (XiPAF) is under construction in Xi’an City, China. The facility is mainly composed of one 7 MeV H linac injector (Fig. 1), one Middle Energy Beam Transport line (MEBT), one 200 MeV six-fold synchrotron, two High Energy Beam Transport lines (HEBT) and two experimental stations. A flux of 10~10 p/cm/s with the non-uniformity of better than ±10% on the sample in the range of 1 cm×1 cm ~ 10 cm×10 cm is designed. The synchrotron will be operated with the slow-extraction mode to provide the proton beam with the pulse width of 1~10 s. The designed number of the accumulated protons in each pulse in the synchrotron is 1×10. Injection energy of 7 MeV is therefore determined to both achieve the accumulated particles in the synchrotron and limit the cost of the linac injector. The negative hydrogen ion beam is debunched to reduce the energy spread and strip-injected into the synchrotron. The parameter requirement of the linac injector is presented in Table 1. In this paper, the design result of the 7 MeV linac injector for the 230 MeV synchrotron of the XiPAF project is presented. Table 1: Requirement of the Linac Injector for XiPAF Parameter Value Unit