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A LN2-based cooling system for a next-generation liquid xenon dark matter detector

Nuclear Science and Techniques 2020年第8期31卷 24-34页

作者： karl Ludwig giboni Pratibha Juyal Elena Aprile Yun Zhang Junji Naganoma INPAC and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Laboratory for Particle and Cosmology Shanghai 200240China Columbia Astrophysics Lab and Physics Department Columbia UniversityNew YorkNY 10027USA Department of Physics and Astronomy Rice UniversityHoustonTX 77005USA

In recent years, cooling technology for liquid xenon(LXe) detectors has advanced driven by the development of dark matter(DM) detectors with target mass in the 100–1000 kg range. The next generation of DM detectors based on LXe will be in the 50,000 kg(50 t)range requiring more than 1 k W of cooling power. Most of the prior cooling methods become impractical at this *** cooling a 50 t scale LXe detector, a method is proposed in which liquid nitrogen(LN2) in a small local reservoir cools the xenon gas via a cold finger. The cold finger incorporates a heating unit to provide temperature regulation. The proposed cooling method is simple, reliable, and suitable for the required long-term operation for a rare event search. The device can be easily integrated into present cooling systems, for example the ‘‘Cooling Bus’ ’employed for the Panda X I and II experiments. It is still possible to cool indirectly with no part of the cooling or temperature control system getting in direct contact with the clean xenon in the detector. Also, the cooling device can be mounted at a large distance, i.e., the detector is cooled remotely from a distance of 5–10 m. The method was tested in a laboratory setup at Columbia University to carry out different measurements with a small LXe detector and behaved exactly as predicted.

关键词： Noble liquid detectors(scintillation,ionization,double-phase) Dark matter detectors(WIMPs,axions,etc.) Large detector systems for particle and astroparticle physics Very low-energy charged particle detectors Time projection chambers Cryogenics Detector cooling and thermo-stabilization

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On proportional scintillation in very large liquid xenon detectors

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Nuclear Science and Techniques 2020年第9期31卷 90-97页

作者： Pratibha Juyal karl-Ludwig giboni Xiang-Dong Ji Jiang-Lai Liu School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai Key Laboratory for Particle Physics and Cosmology(INPAC)800 Dongchuan RoadShanghai 200240China

The charge readout of a liquid xenon(LXe)detector via proportional scintillation in the liquid phase was first realized by the Waseda group 40 years ago,but the technical challenges involved were *** the tests were successful,this method was finally discarded and eventually nearly ***,this approach is not considered for large LXe dark matter ***,the dual-phase technology was selected despite many limitations and *** two independent studies,two groups from Columbia University and Shanghai Jiao Tong University reevaluated proportional scintillation in the liquid *** studies established the merits for very large LXe detectors,but the Columbia group also encountered apparent limitations,namely the shadowing of the light by the anode wires,and a dependence of the pulse shape on the drift path of the electrons in the anode *** differences between the two studies,however,are not intrinsic to the technique,but a direct consequence of the chosen *** the geometrical differences into account,the results match without *** also agree with the original results from the Waseda group.

关键词： Liquid detectors Time projection chambers(TPC) Multiplication and electroluminescence in rare gases and liquids

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Detecting neutrinos from supernova bursts in PandaX-4T

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Chinese Physics C 2024年第7期48卷 14-21页

作者：庞彬宇阿布都沙拉木·阿布都克力木薄子豪陈葳谌勋程晨成兆侃崔祥仪樊英杰方德清符长波付孟婷耿立升 karl giboni 顾琳慧郭绪元韩晨成韩柯何昶达何金荣黄迪黄彦霖黄俊挺黄周侯汝全侯钰季向东巨永林李晨翔李家富李名川李帅杰李涛林箐刘江来陆聪聪芦晓盈罗棱尹罗云阳马文博马余刚冒亚军孟月宁旭阳祁宁春钱志成任祥祥 Nasir Shaheed 尚晓凤邵熙元申国防司琳孙文良谈安迪陶奕王安庆王萌王秋红王少博王思广王为王秀丽王舟魏月环武蒙蒙邬维浩夏经铠肖梦姣肖翔谢鹏伟燕斌斌颜玺雨杨继军杨勇姚玉坤喻纯旭袁影苑哲鑫宁张丹张敏桢张鹏张世博张澍张涛张洋张瀛心张园园赵力郑其斌周济芳周宁周小朋周永周钰博 New Cornerstone Science Laboratory Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai200240China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237ShandongChina Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237ShandongChina School of Physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai519082China Department of Physics Yantai UniversityYantai 264005China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China School of Physics Beihang UniversityBeijing 102206China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics University of MarylandCollege ParkMaryland 20742USA State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China School of Physics Nankai UniversityTian

Neutrinos from core-collapse supernovae are essential for understanding neutrino physics and stellar ***-phase xenon dark matter detectors can be used to track explosions of galactic supernovae by detecting neutrinos through coherent elastic neutrino-nucleus *** this study,a variation of progenitor masses and explosion models are assumed to predict neutrino fluxes and spectra,which result in the number of expected neutrino events ranging from 6.6 to 13.7 at a distance of 10 kpc over a 10-s duration with negligible backgrounds at *** specialized triggering alarms for monitoring supernova burst neutrinos are *** efficiency of detecting supernova explosions at various distances in the Milky Way is *** alarms will be implemented in the real-time supernova monitoring system at PandaX-4T in the near future,which will provide supernova early warnings for the astronomical community.

关键词： core-collapse supernovae neutrinos liquid xenon detectors supernova early warnings

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Screener3D:a gaseous time projection chamber for ultra-low radioactive material screening

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Nuclear Science and Techniques 2021年第12期32卷 103-115页

作者： Hai-Yan Du Cheng-Bo Du karl giboni Ke Han Sheng-Ming He Li-Qiang Liu Yue Meng Shao-Bo Wang Tao Zhang Li Zhao Ji-Fang Zhou INPAC Shanghai Laboratory for Particle Physics and CosmologyKey Laboratory for Particle Astrophysics and Cosmology(MOE)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China SJTU-ParisTech Elite Institute of Technology(SPEIT) Shanghai Jiao Tong UniversityShanghai 200240China

In experiments searching for rare signals,background events from the detector itself are some of the major factors limiting search *** for ultra-low radioactive detector materials is becoming ever more *** propose to develop a gaseous time projection chamber(TPC)with a Micromegas readout for radio *** TPC records three-dimensional trajectories of charged particles emitted from a flat sample placed in the active volume of the *** detector can distinguish the origin of an event and identify the particle types with information from trajectories,which significantly increases the screening *** a particles from the sample surface,we observe that our proposed detector can reach a sensitivity higher than 100 l Bq m-2 within two days.

关键词： Charged-particle detector Surface a measurement Ultra-low radioactivity Material screening

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Waveform simulation in PandaX-4T

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Chinese Physics C 2024年第7期48卷 1-13页

作者：李家富阿卜杜萨拉姆薄子豪陈葳谌勋程晨成赵侃崔祥仪樊英杰方德清耿立升 karl giboni 郭绪元韩晨成韩柯何昶达何金荣黄迪黄俊挺黄周侯汝全侯钰季向东巨永林李晨翔李名川李帅杰李涛林箐刘江来陆聪聪芦晓盈罗棱尹罗云阳马文博马余刚冒亚军孟月宁旭阳庞彬宇祁宁春钱志成任祥祥 Nasir Shaheed 尚晓凤邵熙元申国防司琳孙文良谈安迪陶奕王安庆王萌王秋红王少博王思广王为王秀丽王旭王舟魏月环武蒙蒙邬维浩吴渊肖梦姣肖翔燕斌斌阎玺宇杨勇喻纯旭袁影苑哲运有辉曾鑫宁张敏桢张鹏张世博张澍张涛张威张洋张瀛心张园园赵力周济芳周宁周小朋周永周钰博周知震 School of Physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China School of Physics Beihang UniversityBeijing 102206China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China School of Physics Peking UniversityBeijing 100871China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China Department of Physics University of MarylandCollege ParkMaryland 20742USA Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China School of Physics and Astronomy Sun Yat-Sen UniversityZhuhai 519082China School of Physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics Yantai UniversityYantai 264005Ch

Signal reconstruction through software processing is a crucial component of the background and signal models in the PandaX-4T experiment,which is a multi-tonne dark matter direct search *** accuracy of signal reconstruction is influenced by various detector artifacts,including noise,dark count of photomultiplier,photoionization of impurities in the detector,and other relevant *** this study,we presented a detailed description of a semi-data-driven approach designed to simulate a signal *** work provides a reliable model for the efficiency and bias of the signal reconstruction in the data analysis of *** comparing critical variables that relate to the temporal shape and hit pattern of the signals,we found good agreement between the simulation and data.

关键词： dark matter time projection chamber simulation

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Neutron-induced nuclear recoil background in the PandaX-4T experiment

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Chinese Physics C 2022年第11期46卷 262-274页

作者：黄周申国防王秋红阿布都沙拉木·阿布都克力木薄子豪陈葳谌勋陈云华程晨成云珊崔祥仪樊英杰方德清符长波付孟婷耿立升 karl giboni 顾琳慧郭绪元韩晨成韩柯何昶达何金荣黄迪黄彦霖侯汝全季向东巨永林李晨翔李名川李舒李帅杰林箐刘江来芦晓盈罗棱尹马文博马余刚冒亚军孟月宁旭阳祁宁春钱志成任祥祥 Nasir Shaheed 商长松司琳孙文良谈安迪陶奕王安庆王萌王少博王思广王为王秀丽王舟武蒙蒙邬维浩夏经铠肖梦姣肖翔谢鹏伟燕斌斌颜玺雨杨继军杨勇喻纯旭袁鞠敏袁影张丹张敏祯张鹏张涛赵力郑其斌周济芳周宁周小朋周永 School of Physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China School of Physics Beihang UniversityBeijing 102206China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary SciencShandong UniversityQingdao 266237China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai200240China School of Physics Nankai UniversityTianjin 300071China School of Physics Peking UniversityBeijing 100871China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing102206China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai200240China

Neutron-induced nuclear recoil background is critical to dark matter searches in the PandaX-4T liquid xenon *** this study,we investigate the features of neutron background in liquid xenon and evaluate its contribution in single scattering nuclear recoil events using three *** first method is fully based on Monte Carlo *** last two are data-driven methods that also use multiple scattering signals and high energy signals in the *** the PandaX-4T commissioning data with an exposure of 0.63 tonne-year,all these methods give a consistent result,i.e.,there are 1.15±0.57 neutron-induced backgrounds in the dark matter signal region within an approximated nuclear recoil energy window between 5 and 100 keV.

关键词： dark matter neutron background multiple scattering high energy gamma

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Determination of Double Beta Decay Half-Life of 136Xe with the PandaX-4T Natural Xenon Detector

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Research 2023年第2期2022卷 33-41页

作者： Lin Si Zhaokan Cheng Abdusalam Abdukerim Zihao Bo Wei Chen Xun Chen Yunhua Chen Chen Cheng Yunshan Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng karl giboni Linhui Gu Xuyuan Guo Ke Han Changda He Jinrong He Di Huang Yanlin Huang Zhou Huang Ruquan Hou Xiangdong Ji Yonglin Ju Chenxiang Li Jiafu Li Mingchuan Li Shu Li Shuaijie Li Qing Lin Jianglai Liu Xiaoying Lu Lingyin Luo Yunyang Luo Wenbo Ma Yugang Ma Yujun Mao Yue Meng Nasir Shaheed Xiaofeng Shang Xuyang Ning Ningchun Qi Zhicheng Qian Xiangxiang Ren Changsong Shang Guofang Shen Wenliang Sun Andi Tan Yi Tao Anqing Wang Meng Wang Qiuhong Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Yuehuan Wei Mengmeng Wu Weihao Wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei Xie Binbin Yan Xiyu Yan Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Zhe Yuan Dan Zhang Minzhen Zhang Peng Zhang Shibo Zhang Shu Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou Yong Zhou IMOE Key Laboratory for Particle Astrophysics and Cosmology Shanghai Key Laboratory for Particle Physics and Cosmology School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Sichuan Research Institute Shanghai Jiao Tong UniversityChengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-sen UniversityGuangzhou 510275China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao266237 ShandongChina Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao266237 ShandongChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory NuclearPyics and Ionampplication(MOE)Instituteof ModenPysics Fun Universty Shanghai 200433China School of Physics Peking UniversityBeijing 100871China Schol of Physics Beihang UniversityBejing 100191China International Research Center for Nuclei and Particles in the Cosmos Beijing key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai200093China Department of Physics University of MarylandCollge ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratoryof Particle Detetion and Electronics University of Scienceand Technology of ChinaHefei230026China Department of Modern Physics University of Science and Technology of ChinaHefei230026China SJTU ParisElite Instute of Technology Shanghai Jiao Tong UniversityShanghai 200240China

Precise measurement of two-neutrino double beta decay(DBD)half-life is an important step for the searches of Majorana neutrinos with neutrinoless double beta *** report the measurement of DBD half-life of 136xe using the Pandax-4T dual-phase Time Projection Chamber(TPC)with 3.7-tonne natural xenon and the first 94.9-day physics data release.

关键词： decay double Determination

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PandaX: a liquid xenon dark matter experiment at CJPL

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Science China(Physics,Mechanics & Astronomy) 2014年第8期57卷 1476-1494页

作者： CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo giboni karl L. GONG HaoWei GUO GuoDong HE Ming HU Jie HUANG XingTao JI XiangDong JU YongLin LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing SHI YuJie STEPHENSON Scott TAN AnDi TARLé Greg WANG HongWei WANG JiMing WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIAO MengJiao XIAO Xiang XIE PengWei YE Tao YOU YingHui ZEN XiongHui ZHANG Hua ZHANG Tao ZHAO HaiYing ZHAO Li ZHOU XiaoPeng ZHU ZhongHua Shanghai Institute of Applied Physics The Institute of Nuclear and Particle Physics Astronomy and Cosmology (INPAC) and Department of Physics and AstronomyShanghai Jiao Tong University Yalong River Hydropower Development Company Ltd. School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE) Shandong University School of Physics Peking University Department of Physics University of Maryland College Park MD 20742 USA School of Mechanical Engineering Shanghai Jiao Tong University Department of Physics University of Michigan Ann Arbor MI 48109 USA

PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay *** central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton *** experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,*** detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional *** this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.

关键词：地下实验室暗物质氙检测器双β衰变探测器设计闪烁

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First dark matter search results from the PandaX-Ⅰ experiment

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Science China(Physics,Mechanics & Astronomy) 2014年第11期57卷 2024-2030页

作者： XIAO MengJiao XIAO Xiang ZHAO Li CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo giboni karl L. GONG HaoWei GUO GuoDong HU Jie HUANG XingTao JI XiangDong JU YongLin LEI SiAo LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing STEPHENSON Scott TAN AnDi TARL Greg WANG HongWei WANG JiMin WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIE PengWei YOU YingHui ZENG XiongHui ZHANG Hua ZHANG Tao ZHU ZhongHua The Institute of Nuclear and Particle Physics Astronomy and Cosmology (INPAC) and Department of Physics and AstronomyShanghai Jiao Tong University Shanghai Institute of Applied Physics Chinese Academy of Sciences Yalong River Hydropower Development Company Ltd. School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE) Shandong University School of Physics Peking University Department of Physics University of MarylandCollege ParkMD20742USA School of Mechanical Engineering Shanghai Jiao Tong University Department of Physics University of MichiganAnn ArborMI48109USA

We report on the first dark-matter(DM)search results from PandaX-I,a low threshold dual-phase xenon experiment operating at the China JinPing Underground *** the 37-kg liquid xenon target with 17.4 live-days of exposure,no DM particle candidate event was *** result sets a stringent limit for low-mass DM particles and disfavors the interpretation of previously-reported positive experimental *** minimum upper limit,3.7×10-44cm2,for the spin-independent isoscalar DM-particle-nucleon scattering cross section is obtained at a DM-particle mass of 49 GeV/c2at 90%confidence level.

关键词：实验室工作搜索结果暗物质散射截面置信水平低质量 DM 氙气

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Dark matter direct search sensitivity of the PandaX-4T experiment

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Science China(Physics,Mechanics & Astronomy) 2019年第3期62卷 49-57页

作者： HongGuang Zhang Abdusalam Abdukerim Wei Chen Xun Chen YunHua Chen XiangYi Cui BinBin Dong DeQing Fang ChangBo Fu karl giboni Franco Giuliani LinHui Gu XuYuan Guo ZhiFan Guo Ke Han ChangDa He ShengMing He Di Huang XingTao Huang Zhou Huang Peng Ji XiangDong Ji YongLin Ju ShaoLi Li Yao Li Heng Lin HuaXuan Liu JiangLai Liu YuGang Ma YaJun Mao KaiXiang Ni JinHua Ning XiangXiang Ren Fang Shi AnDi Tan AnQing Wang Cheng Wang HongWei Wang Meng Wang QiuHong Wang SiGuang Wang XiuLi Wang XuMing Wang Zhou Wang MengMeng Wu ShiYong Wu JingKai Xia MengJiao Xiao PengWei Xie BinBin Yan JiJun Yang Yong Yang ChunXu Yu JuMin Yuan JianFeng Yue Dan Zhang Tao Zhang Li Zhao QiBin Zheng JiFang Zhou Ning Zhou XiaoPeng Zhou Shanghai Key Laboratory for Particle Physics and Cosmology Institute of Nuclear and Particle Physics (INPC) (INPC) and School of Physics and AstronomyShanghai Jiao Tong University School of Physics and Technology Xinjiang University Shanghai Key Laboratory for Particle Physics and Cosmology Institute of Nuclear and Particle Physics (INPC) and School of Physics and AstronomyShanghai Jiao Tong University Yalong River Hydropower Development Company Ltd. Shanghai Institute of Applied Physics Chinese Academy of Sciences School of Mechanical Engineering Shanghai Jiao Tong University School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE)(MOE) Shandong University School of Physics Nankai University Tsung-Dao Lee Institute School of Physics Peking University Department of Physics University of Maryland College Park School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong University Center of High Energy Physics Peking University School of Medical Instrument and Food Engineering University of Shanghai for Science and Technology

The Panda X-4T experiment, a 4-ton scale dark matter direct detection experiment, is being planned at the China Jinping Underground Laboratory. In this paper we present a simulation study of the expected background in this experiment. In a 2.8-ton fiducial mass and the signal region between 1-10 keV electron equivalent energy, the total electron recoil background is found to be 4.9 × 10^(-5) kg^(-1) d^(-1) keV^(-1). The nuclear recoil background in the same region is 2.8 × 10^(-7) kg^(-1) d^(-1) keV^(-1). With an exposure of 5.6 ton-years, the sensitivity of Panda X-4 T could reach a minimum spin-independent dark matter-nucleon cross section of 6 × 10^(-48) cm^2 at a dark matter mass of 40 Ge V/c^2.

关键词： dark matter WIMPs direct detection xenon

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