Development of heterogeneous multiprocessing digital beam position and phase monitor electronics at HIAF-iLinac  

作　　者：Zhi-Xue Li Jun-Xia Wu Ke-Wei Gu Fa-Fu Ni Rui-Xia Tian Guang-Yu Zhu Yong Zhang Shang-Shang Lu Li-Li Li Hong-Ming Xie Ze Du Xiao-Xuan Qiu Yuan Wei Long Jing Jia Yin Pei-Lin He Weng-Hui Li Hong-Fei Zhang 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China [4]School of Physics,Xi’an Jiao Tong University,Xi’an 710049,China

出　　处：《Nuclear Science and Techniques》2025年第4期105-118,共14页核技术(英文)

基　　金：supported by the National Natural Science Foundation of China(No.11975290)。

摘　　要：The heavy-ion accelerator facility(HIAF)under construction in China will produce various stable and intense radioactive beams with energies ranging from MeV/u to GeV/u.The ion-linac(iLinac)accelerator,which will serve as the injector for the HIAF,is a superconducting heavy-ion accelerator containing 13 cryomodules.It will operate in either continuous wave mode or pulsed mode,with a beam current ranging from 0.01 to 1 emA.The beam position monitor(BPM)is crucial for this high-beam-power machine,which requires precise beam control and a very small beam loss of less than 1 W/m,especially inside the cryomodules of this unique beam instrument.Nearly 70 BPMs will be installed on the iLinac.New digital beam position and phase measurement(DBPPM)electronics based on a heterogeneous multiprocessing platform system-on-chip(MPSoC)has been developed to provide accurate beam trajectory and phase measurements as well as beam interlocking signals for a fast machine protection system(MPS).The DBPPM comprises an analog front-end(AFE)board in field programmable gate array(FPGA)mezzanine-connector(FMC)form factor,along with a digital signal processing board housed within a “2U 19”chassis.To mitigate radio frequency(RF)leakage effects from high-power RF systems in certain scenarios,beam signals undergo simultaneous processing at both fundamental and second-harmonic frequencies.A dynamic range from-65 dBm to 0 dBm was established to accommodate both weak beam commissioning and high-intensity operational demands.Laboratory tests demonstrated that at input power levels exceeding-45 d Bm,the phase resolution surpasses 0.05°,and the position resolution exceeds 5μm.These results align well with the stipulated measurement requirements.Moreover,the newly developed DBPPM has self-testing and self-calibration functions that are highly helpful for the systematic evaluation of numerous electronic components and fault diagnosis equipment.In addition,the DBPPM electronics implements a 2D nonlinear polynomial correction on the FPGA and can co

关 键 词：HIAF Beam position and phase monitor Digital signal processing FPGA 

分 类 号：O57[理学—粒子物理与原子核物理]