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Commissioning and operation of the cryostat for 3W1 SC wiggler

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Nuclear Science and Techniques 2023年第6期34卷 43-54页

作者： Miao-Fu Xu xiang-zhen zhang Rui Ye Jin-Can Wang Xiao-Juan Bian Yao Gao Min-Xian Li Fu-San Chen Xiao-Chen Yang Rui Ge Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China Key Laboratory of Particle Acceleration Physics and Technology Chinese Academy of SciencesBeijing100049China Center for Superconducting RF and Cryogenics Institute of High Energy PhysicsBeijing100049China University of Chinese Academy of Sciences Beijing100049China

A 3W1 superconducting wiggler(SCW)with the pole gap of 68 mm was successfully tested and installed in a BEPC II storage ring in November,*** goal of zero liquid helium consumption was achieved,and the cryogenic system exhibited a 12%residual cooling capacity(approximately 0.69 W@4.2 K).The 3W1-SCW was set to operate at 2.49 T and has been operating for more than seven *** instances of magnet quenching occurred during the normal *** evaporated helium gas can be recycled to the helium gas recycling system when the pressure in the helium tank is higher than the parameter value(the setpoint of the pressure value is 1.2 bara).The cryogenic system can be recovered within 4 h if sufficient liquid helium is available to inject into the cryostat.

关键词： Cryostat Commissioning SC wiggler Synchrotron radiation

Design, assembly, and pre-commissioning of cryostat for 3W1 superconducting wiggler magnet

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Nuclear Science and Techniques 2020年第11期31卷 78-92页

作者： Miao-Fu Xu xiang-zhen zhang Rui Ye Fu-San Chen Xiao-Chen Yang Tong-Xian Zhao Shao-Peng Li Xian-Jing Sun Liang-Rui Sun Chang-Cheng Ma Rui Ge Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Key Laboratory of Particle Acceleration Physics and Technology Chinese Academy of SciencesBeijing 100049China Center for Superconducting RF and Cryogenics Institute of High Energy PhysicsBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

One of the most important devices for the High Energy Photon Source Test Facility project,the 2.6 T 32-pole 3W1 superconducting wiggler,was designed by the Institute of High Energy Physics(IHEP);its magnetic gap is 68 mm,and its storage energy is 286 *** will be installed at the storage ring of the Beijing Electron Positron Collider Upgrade Project at the IHEP to replace the old permanent *** primary purpose of the cryostat is to create a safe and reliable system and realize long-term operation with zero liquid helium *** maintain liquid helium temperature,four identical two-stage cryocoolers are placed symmetrically at the wiggler *** cryostat has only one 60 K thermal shield,which is used to reduce the heat load to the liquid helium *** cryostat has several novel features,including a suspension system with little heat leakage that is self-centered during cooling of the cryostat,a special copper liner and high-efficiency condensers,three pairs of binary current leads,and three-level safety *** cryogenic system has been cooled three times,and the residual cooling capacity is approximately 0.41 W at 4.2 K without current.

关键词： Cryostat Cryocooler Superconducting wiggler Superconducting insertion device

ADS Injector-I 2 K superfluid helium cryogenic system

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Nuclear Science and Techniques 2020年第4期31卷 79-92页

作者： Rui Ge Shao-Peng Li Rui-Xiong Han Miao-Fu Xu Liang-Rui Sun Min-Jing Sang Rui Ye Zhuo zhang Jie-Hao zhang xiang-zhen zhang Lin Bian Jian-Qin zhang Mei Li Chang-Cheng Ma zheng-Ze Chang Tong-Xian Zhao Yong-Cheng Jiang Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Key Laboratory of Particle Acceleration Physics and Technology CASBeijing 100049China Center for Superconducting RF and Cryogenics Institution of High Energy PhysicsBeijing 100049China

The Accelerator Driven Sub-critical(ADS)system is a strategic plan to solve the nuclear waste problem for nuclear power plants in ***-energy particle accelerators and colliders contain long strings of superconducting devices,superconducting radio frequency cavities,and magnets,which may require cooling by 2 K superfluid helium(HeliumⅡ).2 K superfluid helium cryogenic system has become a research hot spot in the field of superconducting *** this study,the ADS Injector-I 2 K cryogenic system is examined in *** cryogenic system scheme design,key equipment,and technology design,such as the 2 K Joule–Thomson(J–T)heat exchanger and cryomodules CM1+CM2 design,are examined,in addition to the commissioning and operation of the cryogenic *** ADS Injector-I 2 K cryogenic system is the first 100 W superfluid helium system designed and built independently in *** ADS proton beam reached 10 Me V at 10 m A in July 2016 and 10 Me V at 2 m A in continuous mode in January 2017 and has been operated reliably for over 15,000 h,proving that the design of ADS Injector-I 2 K cryogenic system,the key equipment,and technology research are reasonable,reliable,and meet the *** research into key technologies provides valuable engineering experience that can be helpful for future projects such as CI-ADS(China Initiative Accelerator-Driven System),SHINE(Shanghai High Repetition Rate XFEL and Extreme Light Facility),PAPS(Platform of Advanced Photon Source Technology),and CEPC(Circular Electron-Positron Collider),thereby developing national expertise in the field of superfluid helium cryogenic systems.

关键词： ADS Superfluid helium Cryogenic system Cryomodule J–T heat exchanger

Superconducting multipole wiggler with large magnetic gap for HEPS-TF

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Nuclear Science and Techniques 2022年第2期33卷 21-29页

作者： Xian-Jing Sun Fu-San Chen xiang-Chen Yang Wan Chen Xiao-Juan Bian Min-Xian Li Rui Ge Miao-Fu Xu Yao Gao Jin-Can Wang Hui-Hua Lu Jian-She Cao Zhi-Qiang Li Zhuo zhang Rui Ye xiang-zhen zhang Shuai Li Bao-Gui Yin Mei Yang Ling-Ling Gong Da-Heng Ji Lin Bian Ran Liang Ya-Jun Sun Hong Shi Institute of High Energy Physics Chinese Academy of SciencesBeijing 10049China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China China Spallation Neutron Source Institute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China

A 16-pole superconducting multipole wiggler with a large gap of 68 mm was designed and fabricated to serve as a multipole wiggler for *** wiggler consists of 16 pairs of NbTi superconducting coils with a period length of 170 mm,and its maximum peak field is 2.6 *** magnet design,magnet poles were ***,the Lorentz force on the coils and electromagnetic force between the upper and lower halves were computed and analyzed along with the stored energy and inductance at different *** enhance the critical current of the magnet coil,all the pole coils selected for the magnet exhibited excellent performance,and appropriate prestress derived from the coil force analysis was applied to the pole coils during magnet *** entire magnet structure was immersed in 4.2-K liquid helium in the cryostat cooled solely by four two-stage cryocoolers,and the performance test of the superconducting wiggler was appropriately *** on the measured results,the first and second field integrals on the axis of the superconducting wiggler were significantly improved at different field levels after the compensation of the corrector ***,the wiggler was successfully installed in the storage ring of BEPCII operation with beams.

关键词： Superconducting multipole wiggler Force analysis Quench protection Magnetic field measurement HEPS-TF Cryostat

Hall sensor angle error and relative position calibrations for cryogenic permanent magnet undulator of high energy photon source test facility(HEPS-TF)

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Radiation Detection Technology and Methods 2017年第2期1卷 65-70页

作者： Ling-Ling Gong Wan Chen Wen Kang Shu-Chen Sun Zhi-Qiang Li Lei zhang Yu-Feng Yang Hui-Hua Lu Xiao-Yu Li Shu-Tao Zhao xiang-zhen zhang Ya-Jun Sun Laboratory of Particle Acceleration Physics and Technology Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Science Beijing 100049China China Spallation Neutron Source(CSNS) Institute of High Energy Physics(IHEP)Chinese Academy of Sciences(CAS)Dongguan 523803China Dongguan Institute of Neutron Science(DINS) Dongguan 523808China

Purpose A new in-vacuum three-dimensional Hall probe magnetic measurement system is under fabrication for characterizing the magnetic performance of the Cryogenic Permanent Magnet Undulator(CPMU).In order to fit the small gap(5 mm)of magnetic structure and vacuum environment,a small three-dimensional Hall probe has been *** angular and positional misalignment errors of the Hall sensors play an important role in the measurement accuracy of the *** order to minimize the misalignment errors,a method of calibrating angle error and relative assembly displacements of a three-dimensional Hall probe is carried *** The angle error of Hall sensors will be calibrated by a standard dipole magnet and a five-dimensional Hall *** standard dipole magnet will generate a single direction and uniform magnetic *** the fivedimensional Hall bench is used to rotate the Hall probe which is put in the center of *** on the relationship between angle and magnetic field strength,the angle error of each Hall sensor will be *** relative position between the sensitive areas of the Hall sensors will be calibrated by a two-dimensional magnetic field undulator *** on Maxwell’s equations,through the calculation of measurement magnetic field strength,the relative assembly displacements of the three Hall sensors can be *** The details of the calibration methods and the data processing of angle error and relative assembly displacements of a three-dimensional Hall probe are *** three-dimensional magnetic fields of a cryogenic permanent magnet undulator can be received accurately by correcting these angle errors and position errors of Hall *** This paper illustrates the relative position and angle calibration procedures and the data processing of a three-dimensional Hall *** the design of a smaller Hall probe is in *** calibration of the angle errors and position errors will be carried out

关键词： Magnetic measurement system Cryogenic permanent magnet undulator Three-dimensional Hall probe Calibration of Hall probe

Prediction and optimization of flue pressure in sintering process based on SHAP

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 346-359页

作者： Mingyu Wang Jue Tang Mansheng Chu Quan Shi zhen zhang School of Metallurgy Northeastern UniversityShenyang 110819China Liaoning Low-Carbon Steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking(Ministry of Education) Shenyang 110819China

Sinter is the core raw material for blast *** pressure,which is an important state parameter,affects sinter *** this paper,flue pressure prediction and optimization were studied based on the shapley additive explanation(SHAP)to predict the flue pressure and take targeted adjustment ***,the sintering process data were collected and processed.A flue pressure prediction model was then constructed after comparing different feature selection methods and model algorithms using SHAP+extremely random-ized trees(ET).The prediction accuracy of the model within the error range of±0.25 kPa was 92.63%.SHAP analysis was employed to improve the interpretability of the prediction *** effects of various sintering operation parameters on flue pressure,the relation-ship between the numerical range of key operation parameters and flue pressure,the effect of operation parameter combinations on flue pressure,and the prediction process of the flue pressure prediction model on a single sample were analyzed.A flue pressure optimization module was also constructed and analyzed when the prediction satisfied the judgment *** operating parameter combination was then *** flue pressure was increased by 5.87%during the verification process,achieving a good optimization effect.

关键词： sintering process flue pressure shapley additive explanation prediction optimization

Influence of cryogenic permanent magnet undulator motion error on magnetic field error and radiation intensity loss

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Radiation Detection Technology and Methods 2018年第1期2卷 200-206页

作者： Shu-Chen Sun Wei-Fan Sheng Hui-Hua Lu Xiao-Yu Li Shu-Tao Zhao Ling-Ling Gong Wan Chen Zhi-Qiang Li Lei zhang Yu-Feng Yang xiang-zhen zhang Ya-Jun Sun Laboratory of Particle Acceleration Physics&Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Science Beijing 100049China

A cryogenic permanent magnet undulator prototype designed for Chinese High Energy Photon Source Test Facility(HEPSTF)at Institute of High Energy Physics is constructed and now *** precision of girders is a significant parameter to guarantee gap error so as to avoid phase error and radiation intensity *** order to study and minimize girder parallelism errors,RADIA and SPECTRA are used to calculate qualified motion *** Modules and single motor closed-loop feedback are designed to compensate the *** field is finally tuned to reach *** of the study and analysis will be presented in this paper.

关键词： Motion precision test Cryogenic permanent magnet undulator Phase error Radiation intensity

Magnetic field strength and temperature-dependent calibration system of Hall probe for the HEPS-TF cryogenic permanent magnet undulator

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Radiation Detection Technology and Methods 2018年第1期2卷 128-135页

作者： Ling-Ling Gong Wan Chen Wen Kang Lei zhang xiang-zhen zhang Shu-Chen Sun Fu-San Chen Lei Wu Ya-Jun Sun Zhi-Qiang Li Yu-Feng Yang Hui-Hua Lu Xiao-Yu Li Shu-Tao Zhao Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China China Spallation Neutron Source(CSNS) Institute of High Energy Physics(IHEP)Chinese Academy of Sciences(CAS)Dongguan 523803China Dongguan Institute of Neutron Science(DINS) Dongguan 523808China

Purpose High energy photon source test facility(HEPS-TF)has manufactured a three-dimensional Hall probe to measure the cryogenic permanent magnet undulator(CPMU).Since the operating environment of the CPMU is the subcooled liquid nitrogen(85K),the temperature of the Hall probe will have a decrease of several degrees while carrying out the local magnetic *** established a magnetic field strength and temperature-dependent calibration system to calibrate the Hall *** The magnetic field strength of the Hall probe was calibrated by a standard dipole electromagnet and a nuclear magnetic resonance Tesla meter(NMR).The temperature of Hall probe was controlled by a control system which can modulate temperature from 0℃ to 30℃.Results A new homemade Hall probe has finished the temperature-dependent(0℃ to 30℃),magnetic field strength(-1.2 to 1.2 T)and angle error calibration at this new calibration *** temperature correction error is less than 0.045%.The calibration error of magnetic field strength is less than 1.5 *** RMS calibration error of Hall sensors angle matrix is less than *** The magnetic field strength and temperature-dependent calibration system including a standard dipole electromagnet,a temperature regulation system,an NMR and a five-dimensional Hall bench was *** detailed magnetic field strength and temperature-dependent calibration system is introduced and the results of the calibrations are presented.

关键词： Temperature calibration Cryogenic permanent magnet undulator Three-dimensional Hall probe Nuclear magnetic resonance Tesla meter

结合光流跟踪和三焦点张量约束的双目视觉里程计

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中国惯性技术学报 2016年第4期24卷 473-479页

作者：程传奇郝向阳张振杰赵漫丹信息工程大学导航与空天目标工程学院郑州450001 北斗导航应用技术河南省协同创新中心郑州450001

针对城市街道准确实时定位的问题,提出将光流跟踪与三焦点张量约束结合的双目视觉里程计方法。为提高运算效率,将图像序列分为关键帧与非关键帧,对关键帧进行常规的特征点检测与匹配,对非关键帧用Lucas-Kanade光流跟踪特征点对。推导了... 详细信息

针对城市街道准确实时定位的问题,提出将光流跟踪与三焦点张量约束结合的双目视觉里程计方法。为提高运算效率,将图像序列分为关键帧与非关键帧,对关键帧进行常规的特征点检测与匹配,对非关键帧用Lucas-Kanade光流跟踪特征点对。推导了基于前后帧、左右视图三焦点张量约束的观测方程,顾及动力学方程,组成卡尔曼滤波模型。考虑到观测方程的非线性,采用迭代Sigma点卡尔曼滤波进行解算,解算过程中用RANSAC稳健估计策略提纯匹配,以增强系统整体稳健性。实验结果表明:提出的算法在基本不损失精度(X方向优于5 m,Y方向优于4 m)的情况下,计算速度提升6.2倍,单帧图像平均处理时间由0.3115 s下降为0.0503 s,能够满足城市定位实时准确的需求。

关键词：双目视觉里程计光流三焦点张量迭代Sigma点卡尔曼滤波