共查询到17条相似文献,搜索用时 467 毫秒
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介绍了SFRFQ加速系统的最新研究进展. 为验证SFRFQ结构的抗打火性能, 设计了一个高功率模型腔, 进行了高功率打火实验, 并最终证明了该结构的可行性. 为验证SFRFQ加速器的载束性能, 设计了一台长度仅为1m的600keV O+ SFRFQ加速器, 它将把从1MeV ISR RFQ引出的O+离子加速到1.6MeV. 为解决1MeV ISR RFQ引出束流与SFRFQ加速器的横向匹配问题, 在其间插入了一个三单元磁四极透镜. SFRFQ加速器加工和1MeV ISR RFQ改造的进展顺利. 相似文献
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介绍了SFRFQ加速系统的最新研究进展.为验证SFRFQ结构的抗打火性能,设计了一个高功率模型腔,进行了高功率打火实验,并最终证明了该结构的可行性.为验证SFRFQ加速器的载束性能,设计了一台长度仅为lm的600keV O+SFRFQ加速器,它将把从1MeV ISR RFQ引出的O+离子加速到1.6MeV.为解决1MeV ISR RFQ引出柬流与SFRFQ加速器的横向匹配问题,在其间插入了一个三单元磁四极透镜.SFRFQ加速器加工和1MeV ISR RFQ改造的进展顺利. 相似文献
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在分离作用射频四极场(SFRFQ)加速腔中加入频率调谐装置,用步进电机驱动调谐杆运动,改变调谐板在腔中的位置来改变调谐板与支撑环之间的分布电容,从而改变SFRFQ腔的工作频率,使其谐振频率为26.07 MHz,实现了RFQ和SFRFQ组合加速系统频率的匹配。在完成两腔频率调谐的基础上进行了SFRFQ腔体1/6占空比高功率试验,轫致辐射谱的测量表明,SFRFQ极间电压在入射峰值功率为28.8 kW时已达到86.2 kV,超过了设计指标的70.0 kV。 相似文献
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阐述了北京大学整体分离环高频四极场(ISRRFQ)加速器研究所取得的研究成果.分别论述了26MHz300keVISRRFQ加速器结构、束流动力学设计、高频控制系统、束流试验装置及束流试验;分析了其对N+、O+、O-束流试验的研究结果;简述了26MHz1MeVRFQ加速器束流动力学、加速腔设计及目前的进展 The status of the ISR RFQ accelerators in Peking University is described. The structure of ISR RFQ accelerator, beam dynamics calculation results by PARMTEQ, RF systems, beam transport lines and the beam test evolutions of a 26 MHz 300 keV ISR RFQ accelerator are also presented, respectively. The beam test results for N +, O +, O - particles are analyzed in detail. At last, the development of 1 MeV 26 MHz ISR RFQ accelerator is introduced briefly. 相似文献
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由于束流的传输效率对射频四极场加速器(RFQ) 中射频场的分布极其敏感,所以在RFQ 的运行过程中不再采用传统的调谐器调谐RFQ。水冷调谐的方法基本上不影响RFQ 射频场的分布,所以适用于RFQ 的调谐。中国科学院高能物理研究所为C-ADS、CSNS 预研RFQ 项目开发建造了一套水冷调谐系统,使用RF 相位差作为控制量进行RFQ 水冷调谐,相位差的控制精度达到了1°运行结果显示该系统满足了RFQ 的调谐需求。介绍了该系统的水冷系统、调谐控制系统和一些运行经验。Since the beam transmission of a Radio Frequency Quadrupole(RFQ) Accelerator is very sensitive to the field profile, the ordinary frequency tuning method by the local movable tuner is no more adopted in an RFQ operation. The tuning method by controlling cooling water temperature is widely adopted to tune the RFQ due to the less affect on the RFQ field profile. A Resonance Control Cooling System (RCCS) is developed and commissioned for the 973 RFQ,which is a R&D project for C-ADS and CSNS RFQ at IHEP. This system adopts the RF phase difference as control variable to tune the RFQ. The control accuracy of the RF phase difference is about 1°. The running of the 973 RFQ shows that the RCCS works very well and fully satisfies the operation requirement of the RFQ. In this paper, the water skid, resonance control system of the RCCS and the operation experiences will be presented. 相似文献
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强流质子加速器需要采用分段共振耦合RFQ作为其低能加速结构,为减少束流损失,RFQ加速器必须达到所要求的场分布.针对共振耦合结构的特殊性,在RFQ传输线模型的理论基础上,在一台RFQ冷模型上进行了场调谐的实验研究,获得了满意的实验结果.同时,也验证了作者用LabVIEW编写的RFQ场调谐程序的正确性. 相似文献
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将滑模极值搜索算法引入基于腔体反射信号的SSC-LINAC射频四极场加速器(Radio Frequency Quadrupole, RFQ)腔体频率稳定系统设计中,结合Lyapunov稳定性理论和SSC-LINAC RFQ高频系统的特点,对滑模极值搜索算法的控制增益和参考信号进行改进;通过求解微分方程,得到腔体反射信号关于时间和调谐杆位置的函数。通过软件仿真和设计硬件系统,对基于滑模极值搜索算法的调谐过程进行仿真与实际测试,结果显示,所设计的频率稳定系统能够在较短时间内实现SSC-LINAC RFQ腔体功率自动馈入过程且频率稳定度满足设计指标要求,通过了长时间稳定性试验。证明了将滑模极值搜索算法应用于高频谐振腔调谐工作的可行性。 相似文献
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Kang MingLei Lu YuanRong Wang Zhi Zhu Kun Yan XueQing Guo ZhiYu Gao ShuLi Peng ShiXiang Liu Ao Fang JiaXun Chen JiaEr 《中国科学:物理学 力学 天文学(英文版)》2011,54(2):222-224
Separated Function RFQ (SFRFQ) was proposed as a post accelerator of RFQ to accelerate heavy ions at low frequency. It introduces gap accelerating in the quadrupole electrodes, and therefore it has higher accelerating efficiency than the conventional RFQ accelerator. The first SFRFQ prototype cavity has been specially designed and constructed as a post accelerator to accelerate O+ beam from 1.03 MeV to 1.64 MeV. Based on accomplishment of low power measurement and high power test, the beam commissioning was carried out to verify its feasibility. The measured energy gain per cell of SFRFQ is 45 keV, which is about 60% higher than that of Peking University Integral Split Ring (ISR) RFQ. 相似文献
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WANG Zhi CHEN Jia-Er LU Yuan-Rong GUO Zhi-Yu YAN Xue-Qing ZHU Kun KANG Ming-Lei FANG Jia-Xun 《中国物理C(英文版)》2010,34(4):502-505
SFRFQ (Separated Function Radio Frequency Quadrupoles) accelerator is a new post accelerator of RFQ (Radio Frequency Quadrupoles) type, which has been developed since the beginning of the 1990s at Peking University. In order to demonstrate the possibility of the SFRFQ, a prototype cavity has been designed.A special dynamics design method has been proposed to avoid the sparking problem and decrease the energy spread at the exit of SFRFQ. It consists of two aspects: the asymmetry structure design for transverse focusing and the inner buncher design for longitudinal bunching. This allows the improvement of the beam properties without increasing the cavity length. The simulation results show that the energy spread can be substantially reduced by using the inner buncher in the SFRFQ structure. 相似文献
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SFRFQ (Separated Function Radio Frequency Quadrupoles) accelerator is a new post accelerator of RFQ (Radio Frequency Quadrupoles) type, which has been developed since the beginning of the 1990s at Peking University. In order to demonstrate the possibility of the SFRFQ, a prototype cavity has been designed. A special dynamics design method has been proposed to avoid the sparking problem and decrease the energy spread at the exit of SFRFQ. It consists of two aspects: the asymmetry structure design for transverse focusing and the inner buncher design for longitudinal bunching. This allows the improvement of the beam properties without increasing the cavity length. The simulation results show that the energy spread can be substantially reduced by using the inner buncher in the SFRFQ structure. 相似文献
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Design details of a 100 MeV proton linear accelerator (Alvarez system) operating at a resonating frequency of 400 MHz have
been studied. Increase in the linac operating frequency has become feasible with the possibility of injecting protons from
a radio frequency quadrupole accelerator with energies higher than the conventional pre-injectors. Various electrical parameters
of such a system have been calculated and compared with the existing linac injectors operating at 200 MHz. 相似文献
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The progress of the Separated Function RFQ (SFRFQ) accelerator, which can raise the field gradient of acceleration while maintaining the transverse focusing power sufficient for high current beam, is presented. In order to demonstrate the feasibilities of the novel accelerator, a prototype cavity was designed and constructed. Correspondingly, a code SFRFQCODEV1.0 was developed specially for cavity design and beam dynamics simulation. The prototype cavity will be verified as a post-accelerator for ISR RFQ-1000 (Integral Split Ring RFQ) and accelerate O+ from 1 MeV to 1.6 MeV. To inject a higher current oxygen beam for the prototype cavity, the beam current of ISR RFQ-1000 was upgraded to 2 mA. The status of high power and beam test preparation for the prototype cavity are presented in this paper. 相似文献
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It is proposed to construct a spallation neutron source (SNS) at Centre for Advanced Technology (CAT) based on a 1 GeV proton
synchrotron with 100 MeV H− LINAC as injector. Additionally, the LINAC can form the first 100 MeV part of a 1 GeV proton LINAC to be built in future
for accelerator driven system (ADS) applications. We are exploring a configuration of the 100 MeV LINAC which will consist
of an H− ion source, a 4–6 MeV RFQ followed either by a 20 MeV drift tube LINAC (DTL) and 100 MeV separated function drift tube LINAC
(SDTL) or a coupled cavity drift tube LINAC (CCDTL) structure. In this paper, we present the results of our preliminary physics
design studies of the RFQ-SDTL, RFQ-CCDTL and RFQ-DTL-SDTL configurations. The design of the 4.5 MeV RFQ is discussed along
with the matching sections between the RFQ-SDTL/DTL and RFQ-CCDTL. The choice of the accelerator configuration and that of
various parameters of the individual accelerator structures under consideration are discussed. The design objectives are to
arrive at a configuration which eases heat removal for CW operation and which is less prone to halo formation in order to
reduce the beam loss at higher energies. 相似文献