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Application of deep learning methods combined with physical background in wide field of view imaging atmospheric Cherenkov telescopes

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Nuclear Science and Techniques 2024年第4期35卷 208-220页

作者： Ao-Yan Cheng Hao Cai Shi Chen Tian-Lu Chen xiang dong You-liang Feng qi Gao Quan-Bu Gou Yi-qing guo Hong-Bo Hu ming-ming Kang Hai-Jin li Chen liu Mao-Yuan liu Wei liu fang-Sheng Min Chu-Cheng Pan Bing-qiang qiao xiang-li qian Hui-Ying Sun Yu-Chang Sun Ao-Bo wang Xu wang Zhen wang Guang-Guang Xin Yu-hua Yao qiang Yuan Yi Zhang School of Physics and Technology Wuhan UniversityWuhan 430072China School of Physics and Astronomy Yunnan UniversityKunming 650091China Ministry of Education The Key Laboratory of Cosmic Rays(Tibet University)Lhasa 850000China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences 19 A Yuquan RoadShijingshan DistrictBeijing 100049China College of Physics Sichuan UniversityChengdu 610064China School of Intelligent Engineering Shandong Management UniversityJinan 250357China Tsung‑Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China Suzhou Aerospace Information Research Institute Suzhou 215123China College of Physics Chongqing UniversityNo.55 Daxuecheng South RoadHigh‑tech DistrictChongqing 401331China Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210008China

The High Altitude detection of Astronomical Radiation(HADAR)experiment,which was constructed in Tibet,China,combines the wide-angle advantages of traditional EAS array detectors with the high-sensitivity advantages of focused Cherenkov *** objective is to observe transient sources such as gamma-ray bursts and the counterparts of gravitational *** study aims to utilize the latest AI technology to enhance the sensitivity of HADAR *** datasets and models with distinctive creativity were constructed by incorporating the relevant physical theories for various *** models can determine the type,energy,and direction of the incident particles after careful *** obtained a background identification accuracy of 98.6%,a relative energy reconstruction error of 10.0%,and an angular resolution of 0.22°in a test dataset at 10 *** findings demonstrate the significant potential for enhancing the precision and dependability of detector data analysis in astrophysical *** using deep learning techniques,the HADAR experiment’s observational sensitivity to the Crab Nebula has surpassed that of MAGIC and *** energies below 0.5 TeV and remains competitive with conventional narrow-field Cherenkov telescopes at higher *** addition,our experiment offers a new approach for dealing with strongly connected,scattered data.

关键词： VHE gamma-ray astronomy HADAR deep learning Convolutional neural networks

Stepped-up development of accelerator mass spectrometry method for the detection of ^(60)Fe with the HI-13 tandem accelerator

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Nuclear Science and Techniques 2024年第4期35卷 136-143页

作者： Yang Zhang Sheng-Quan Yan ming He qing-Zhang zhao wen-Hui Zhang Chao-Xin Kan Jian-ming Zhou Kang-Ning li Xiao-Fei wang Jian-Cheng liu zhao-hua Peng Zhuo liang Ai-ling li Jian Zheng qi-wen Fan Yun-Ju li You-Bao wang Zhi-Hong li Yang-Ping Shen Ding Nan Wei Nan Yu-qiang Zhang Jia-Ying-Hao li Jun-wen Tian Jiang-lin Hou Chang-Xin guo Zhi-Cheng Zhang ming-Hao Zhu Yu-wen Chen Yu-Chen Jiang Tao Tian Jin-Long Ma Yi-Hui liu Jing-Yu dong Run-Long liu Mei-Yue-Nan Ma Yong-Shou Chen Wei-Ping liu Bing guo China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China College of Science Southern University of Science and TechnologyShenzhen 518055China School of Physics Xi’an Jiaotong UniversityXi’an 710049China

The Moon provides a unique environment for investigating nearby astrophysical events such as *** samples retain valuable information from these events,via detectable long-lived“fingerprint”radionuclides such as^(60)*** this work,we stepped up the development of an accelerator mass spectrometry(AMS)method for detecting^(60)Fe using the HI-13tandem accelerator at the China Institute of Atomic Energy(CIAE).Since interferences could not be sufficiently removed solely with the existing magnetic systems of the tandem accelerator and the following Q3D magnetic spectrograph,a Wien filter with a maximum voltage of±60 kV and a maximum magnetic field of 0.3 T was installed after the accelerator magnetic systems to lower the detection background for the low abundance nuclide^(60)Fe.A 1μm thick Si_(3)N_(4) foil was installed in front of the Q3D as an energy *** particle detection,a multi-anode gas ionization chamber was mounted at the center of the focal plane of the ***,an^(60)Fe sample with an abundance of 1.125×10^(-10)was used to test the new AMS *** results indicate that^(60)Fe can be clearly distinguished from the isobar^(60)*** sensitivity was assessed to be better than 4.3×10^(-14)based on blank sample measurements lasting 5.8 h,and the sensitivity could,in principle,be expected to be approximately 2.5×10^(-15)when the data were accumulated for 100 h,which is feasible for future lunar sample measurements because the main contaminants were sufficiently separated.

关键词： Accelerator mass spectrometry Wien filter Isobar separation Supernovae Chang'e-5 lunar samples

Effect and Safety of Herbal Medicine Foot Baths in Patients with Diabetic Peripheral Neuropathy:A Multicenter Double-Blind Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2024年第3期30卷 195-202页

作者： huaNG Hao-yue liN Yu-ping WEI hua FU Yu ZHOU Yue-hong fang zhao-hui qiU Xiao-tang wang Mei li qing-bo li Shan-shan wang Shi-dong DAI fang liu Zhen-jie zhao ling wen Jian-xuan WU li-yan ZENG Hui-yan ZHANG Jin-ming LU qi-yun HE liu SONG Wei SUN Lu LUO Lu-lu HE Jia-li XIE wen-wen liANG qing-shun huaNG Yuan ZHU Sheng-ling LONG Jie-er GAO Zhi-juan wen Ze-huai li Chun-ji OUYANG wen-wei li Geng WU ming-hui li An-xiang huaNG Jin-zhu Sanjoy K Paul TANG Xian-yu FAN Guan-jie department of Endocrinology Guangdong Provincial Hospital of Chinese MedicineGuangzhou510120China The Second Clinical College of Guangzhou University of Chinese Medicine Guangzhou510120China department of Endocrinology The Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou510120China Guangdong Provincial Academy of Chinese Medical Sciences Guangzhou510120China department of Endocrinology The First Affiliated Hospital of Henan University of Chinese MedicineZhengzhou450000China department of Endocrinology Liuyang Hospital of Chinese MedicineChangsha410000China department of Endocrinology The First Affiliated Hospital of Anhui University of Chinese MedicineHefei230000China department of Endocrinology Hainan Provincial Hospital of Traditional Chinese MedicineHaikou570100China department of Endocrinology The Affiliated Hospital of Liaoning University of Traditional Chinese MedicineShenyang110000China department of Geriatric Luoyang No.1 Hospital of Traditional Chinese MedicineLuoyangHenan Province471000China department of Endocrinology The Second Affiliated Hospital of Guizhou University of Traditional Chinese MedicineGuiyang550000China department of Endocrinology Beijing University of Chinese Medicine Affiliated Dongzhimen HospitalBeijing100000China department of Endocrinology The First Affiliated Hospital of Guizhou University of Traditional Chinese MedicineGuiyang550000China Melbourne EpiCentre The University of Melbourne and Melbourne HealthMelbourne3013Australia

Objective:To evaluate the effect and safety of foot baths with Tangbi Waixi decoction(TW)in treating patients with diabetic peripheral neuropathy(DPN).Methods:It is a multicenter double-blinded randomized controlled *** with DPN were recruited between November 18,2016 and May 30,2018 from 8 hospitals in *** patients received basic treatments for glycemic *** received foot baths with TW herbal granules either 66.9 g(intervention group)or 6.69 g(control group)for 30 min once a day for 2 weeks and followed by a 2-week rest,as a therapeutic *** the Toronto Clinical Scoring System total score(TCSS-TS)6 points,the patients received a total of 3 therapeutic courses(for 12 weeks)and were followed up for 12 *** primary outcome was change in TCSS-TS score at 12 and 24 *** outcomes included changes in bilateral motor nerve conduction velocity(MNCV)and sensory nerve conduction velocity(SNCV)of the median and common peroneal *** was also ***:Totally 632 patients were enrolled,and 317 and 315 were randomized to the intervention and control groups,*** the 12-week intervention,patients in both groups showed significant declines in TCSSTS scores,and significant increases in MNCV and SNCV of the median and common peroneal nerves compared with pre-treatment(Pcantly between groups(P>0.05),and no serious adverse event was related with ***:Treatment of TW foot baths was safe and significantly benefitted patients with DPN.A low dose of TW appeared to be more effective than a high dose.(Registry *** CTR-IOR-16009331)

关键词： diabetic peripheral neuropathy herbal medicine foot baths Chinese medicine randomized controlled trial Tangbi Waixi decoction

Probing dark matter particles from evaporating primordial black holes via electron scattering in the CdeX-10 experiment

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Science China(Physics,Mechanics & Astronomy) 2024年第10期Mechanics & Astronomy) .卷 87-95页

作者： Zhenhua Zhang litao Yang qian Yue Kejun Kang Yuanjing li Haipeng An Greeshma C. Jianping Chang Yunhua Chen Jianping Cheng wenhan Dai Zhi deng Changhao fang Xinping Geng Hui Gong qiuju guo Tao guo Xuyuan guo li He Shengming He Jinwei Hu Hanxiong huang Tuchen huang lin Jiang S.Karmakar Haubin li Hanyu li Jianmin li Jin li qianyun li Renmingjie li Xueqian li Yulan li Yifan liang Bin liao FongKay lin ShinTed lin Jiaxuan liu Shukui liu Yandong liu Yu liu Yuanyuan liu Hao Ma Yucai Mao qiyuan Nie Jinhua Ning Hui Pan Ningchun qi Jie Ren Xichao Ruan Monoj Kumar Singh Tianxi Sun Changjian Tang Yang Tian Guangfu wang Junzheng wang li wang qing wang Yufeng wang Yunxiang wang Henry Tsz-King Wong Shiyong Wu Yucheng Wu Haoyang Xing Rui Xu Yin Xu Tao Xue Yulu Yan Nan Yi Chunxu Yu Haijun Yu Jianfeng Yue ming Zeng Zhi Zeng Bingtao Zhang Fengshou Zhang Lei Zhang Zhenyu Zhang Jizhong zhao Kangkang zhao minggang zhao Jifang Zhou Zuying Zhou Jingjun Zhu CdeX Collaboration Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and department of Engineering Physics Tsinghua University department of Physics Tsinghua University Institute of Physics Academia Sinica NUCTECH Company YaLong River Hydropower development Company College of Nuclear Science and Technology Beijing Normal University College of Physics Sichuan University School of Physics Peking University department of Nuclear Physics China Institute of Atomic Energy Sino-French Institute of Nuclear and Technology Sun Yet-sen University School of Physics Nankai University department of Physics Banaras Hindu University department of Physics Beijing Normal University

Dark matter（DM） is a major constituent of the ***,no definite evidence of DM particles（denoted as “χ”） has been found in DM direct detection（DD） experiments to *** is a novel concept of detectingχfrom evaporating primordial black holes（PBHs）.We search forχemitted from PBHs by investigating their interaction with target *** examined PBH masses range from 1×1015to 7×1016g under the current limits of PBH abundance *** 205.4 kg·day data obtained from the CdeX-10 experiment conducted in the China Jinping Underground Laboratory,we exclude the χ-electron（χ-e） elastic-scattering cross section σχe～5×10-29cm2for χ with a mass ■ keV from our *** the higher radiation background but lower energy threshold（160 eV）,CdeX-10 fills a part of the gap in the previous *** (mχ,σχe) can be determined in the future,DD experiments are expected to impose strong constraints on fPBHfor large MPBHs.

关键词： CdeX primordial black hole light dark matter particle dark matter-electron scattering high purity germanium detector

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CEPC Technical design Report

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Radiation detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili deng Binglin denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia hua Cai wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai huacheng Cai Lorenzo Calibbi Junsong cang guofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen guoming Chen hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen mingjun Chen mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti wen Han Chiu Guk Cho ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui zhaoyuan Cui Brunella D'Anzi ling-Yun Dai Xinchen Dai Xuwen Dai Antonio de Maria Nicola de Filippis Christophe de La Taille Francesca de Mori Chiara de Sio Elisa del Core Shuangxue deng Wei-Tian deng Zhi deng Ziyan deng Bhupal dev Tang dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi dong Jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced Science and Technology Beijing China Institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and Technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian deutsches Elektronen-Synchrotron deSY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China University Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical design Report(TDR)follows the Preliminary Conceptual design Report(Pre-CDR,2015)and the Conceptual design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

纳米Ce_(1-4x)(FeAlCoLa)_(x)O_(2-δ)固溶体微观光谱特征及氧化还原性能研究

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光谱学与光谱分析 2024年第7期44卷 1883-1888页

作者：孙世龙张国芳束俊郭瑞华李一鸣刘卓承许剑轶葛启录内蒙古科技大学材料与冶金学院内蒙古包头014010 钢铁研究总院功能材料所北京100081

采用水热法合成Fe^(3+)、Al^(3+)、Co^(2+)及La^(3+)共掺杂纳米Ce_(1-4x)(FeAlCoLa)_(x)O_(2-δ)(x=0.00~0.05)固溶体,利用X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、紫外吸收光谱(UV)、荧光光谱(PL)、拉曼光谱(Raman)以及与H2的程序升温还原反应(TPR)等方法对固溶体的微观结构、形貌、光谱特征和氧化还原活性进行系统表征及分析。XRD结果表明,Ce_(1-4x)(FeAlCoLa)_(x)O_(2-δ)固溶体均呈CeO_(2)立方萤石结构,当掺杂量增加到x=0.04时,在36.6°处出现了微弱的Co_(3)O_(4)杂相,可以确定掺杂离子在CeO_(2)晶格中的固溶度x<0.04。样品的(111)衍射峰位向高角度偏移,表明掺杂离子引起晶格发生畸变。TEM及SEM结果显示样品为球形纳米颗粒,掺杂离子引起晶面间距变小。紫外吸收光谱表明,与纯CeO_(2)相比,掺杂样品的吸收边逐渐红移,在560~780 nm范围观察到掺杂离子的紫外吸收峰。掺杂引起样品能隙降低,从2.84 eV(纯CeO_(2))逐渐降低至2.10 eV(x=0.05)。其原因可归结为掺杂离子在CeO_(2)的价带和导带之间形成新的杂质能级,允许电子从价带跃迁到较低的杂质能级上,继而降低了跃迁能隙。由于掺杂离子引起晶格内部发生畸变以及氧空位比例增大,阻碍了电子的高能跃迁,也可引起能隙减小。荧光光谱证明,掺杂样品的发射峰强度明显降低。Raman光谱表明,掺杂引起F_(2g)峰位发生偏移,峰强减小,峰宽变大。同时,对应于氧空位峰的相对强度逐渐提高。荧光光谱及Raman光谱均证明掺杂离子引起固溶体晶格畸变程度增加,氧空位浓度提高。H_(2)-TPR测试表明,掺杂可以有效降低CeO_(2)的氧化还原反应温度,提高氧化还原活性,当x=0.03的样品表面还原温度最低,还原峰的面积最大,即氧化还原反应活性最佳,表明样品的氧化还原性能与晶粒尺寸、晶格缺陷及氧空位浓度密切相关。通过以上研究证明,四种离子共掺杂CeO_(2)能够有效修饰微观晶体结构,在较低掺杂浓度下即可显著改善样品的催化活性。

关键词：纳米Ce_(1-4x)(FeAlCoLa)_(x)O_(2-δ)固溶体共掺杂氧空位氧化还原活性

A facile and non-destructive quartz fiber shadow mask process for the sub-micrometer device fabrication on two-dimensional semiconductors

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Rare Metals 2022年第1期41卷 319-324页

作者： li-An li fang-Yuan zhao Shen-qiang Zhai Feng-qi liu Zhong-ming Wei Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

The normal fabrication process for electronic and optoelectronic devices can bring in significant modifications on two-dimensional(2D)semiconductors’intrinsic *** address this issue,some dry methods have been developed,such as“transfer contact”method and“shadow mask technology”.However,the method that can combine the advantages of low cost,non-destruction,and high reliability at sub-micrometer scale is rarely ***,we demonstrate a fabrication technique using ultrafine quartz fibers as shadow *** this technique,sub-micrometer scale devices can be“all dry”fabricated facilely,and the intrinsic properties of 2D semiconductors are ***,the masking effect can be evaluated in situ based on the light interference between the quartz fiber and the substrate to increase the fabrication reliability.

关键词： quartz fiber process

SAPT:a synchrotron-based proton therapy facility in Shanghai

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Nuclear Science and Techniques 2023年第10期34卷 36-46页

作者： Man-Zhou Zhang de-ming li li-Ren Shen Hai-Rong Zhang Zhi-ling Chen Han-wen Du ming Gu Rui li de-Kang liu Yue-Hu Pu Jun-Feng Yu Jian-Feng Chen Chu Chen Chun-Long guo Hao guo Ge-Yang Jiang Zhi-qiang Jiang lin Jin wen-Jing li Xiu-fang li Ye lin ming liu Yong-Hao liu Ya-Juan liu ming Lv qing-Ru Mi lian-hua Ouyang Wei-guo Shi Hang Shu qi-Sheng Tang Kun wang Zhi-Shan wang Jun Wu Xiao-Bing Wu Jia-qiang Xu wen-Zhen Xu Chong-Xian Yin Cheng Yu Ren-Xian Yuan qi-Bing Yuan Hai-Qun Zhang Miao Zhang wen-Zhi Zhang li-Ying zhao Wei-Min Zhou Shou-Xian fang Xi-dong Sun Zhen-Tang zhao Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China APACTRON Particle Equipment Co. Ltd.Shanghai 201815China The Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Because of its excellent dose distribution,proton therapy is becoming increasingly popular in the medical application of cancer treatment.A synchrotron-based proton therapy facility was designed and constructed in *** synchrotron,beam delivery system,and other technical systems were commissioned and reached their expected *** a clinical trial of 47 patients was finished,the proton therapy facility obtained a registration certificate from the National Medical Products *** characteristics of the accelerator and treatment systems are described in this article.

关键词： Proton therapy Synchrotron Slow extraction Gantry Beam delivery system

Low-temperature thermoplastic welding of metallic glass ribbons for in-space manufacturing

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Science China Materials 2021年第4期64卷 979-986页

作者： Chaoqun liao ming liu qi Zhang wen dong Rui zhao Bobo li Zhiwei Jiao Jian Song Wei Yao Shaofan zhao Haiyang Bai Wei-hua wang College of Mechanical and Electrical Engineering Beijing University of Chemical TechnologyBeijing 100029China qian Xuesen Laboratory of Space Technology China Academy of Space technologyBeijing 100094China Institute of Physics Chinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Mechanical Engineering Xi’an Jiaotong UniveristyXi’an 710049China Songshan Lake Materials Laboratory Dongguan 523808China

In-space manufacturing is an emerging and promising research field in space industry,which benefits the development of space *** to the microgravity,high vacuum and complexity of the space environment,a special manufacturing strategy for alloys is highly demanded for the in-space ***,a lowtemperature thermoplastic metallic welding method was proposed and employed for La-based metallic glass *** the sandwiched structures of La-and Zr-based ribbons,the welded samples exhibit a competitive fracture strength and an increased tensile strain than those of the welded la-based samples due to the second phase *** suggests that metallic glass is an ideal material candidate for in-space manufacturing,and can be well manufactured at a nonmelting state with good mechanical *** addition,the thermoplastic manufacturing method can also feature a moderate processing time *** general,this work presents the promising potential of low-temperature thermoplastic welding strategy for in-space manufacturing of metallic materials.

关键词： in-space manufacturing metallic glasses thermoplastic welding mechanical properties