Beam position monitors as precise phase pickups for beam energy measurement at the Compact Pulsed Hadron Source
Beam position monitors as precise phase pickups for beam energy measurement at the Compact Pulsed Hadron Source作者机构:Laboratory of Particle and Radiation ImagingMinistry of EducationTsinghua University Laboratory for Advanced Radiation Sources and ApplicationTsinghua University Department of Engineering PhysicsTsinghua University State Key Laboratory of Intense Pulsed Radiation Simulation and EffectNorthwest Institute of Nuclear Technology
出 版 物:《Nuclear Science and Techniques》 (核技术(英文))
年 卷 期:2019年第30卷第2期
页 面:1-9页
核心收录:
学科分类:08[工学] 0827[工学-核科学与技术]
主 题:Beam energy Time of flight Beam position monitor Phase pickup
摘 要:The 13-MeV proton linac of the Compact Pulsed Hadron Source(CPHS) at Tsinghua University, China,is composed of a 50-keV electron cyclotron resonance proton source, a 3-MeV four-vane-type radio-frequency quadrupole(RFQ) accelerator, and a drift tube linac(DTL). Precise measurement of the beam energies at the exit of the RFQ and the DTL is critical for DTL commissioning. Two button-type beam position monitors(BPMs) installed downstream of the RFQ are used to perform the measurement using a time-of-flight method. The effects of several factors on phase measurement accuracy are analyzed. The phase measurement accuracy of the BPMs at CPHS is better than ± 1.03° at 325 MHz after corrections,corresponding to an energy measurement error of± 0.07%. The beam energy measured at the exit of the RFQ is 2.994 ± 0.0022 MeV,which is consistent with the design value.