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Primary yields of protons measured using CR-39 in laser-induceddeuteron–deuteron fusion reactions

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Nuclear Science and Techniques 2020年第6期31卷 90-98页

作者： Yue zhang Long-Xiang Liu Hong-Wei Wang Yu-Gang Ma Bai-Fei Shen Guo-Qiang zhang Mei-{2. Huang Aldo Bonasera Wen-Peng Wang Jian-Cai xu Shun Li Gong-Tao Fan Xi-Guang Cao Yong Yu Jian-jun He Chang-Bo Fu Suyalatu zhang Xin-{2. Hu Xin-Xiang Li Zi-Rui Hao jun-Wen Wang Han xue Hai-Juan Fu shanghai institute of Applied Physics CASShanghai 201800China University of chinese academy of sciences Beijing 100049China shanghai Advanced Research institute CASShanghai 201210China Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsCASShanghai 201800China Department of Physics Shanghai Normal UniversityShanghai 200234China CAS Center for Excellence in Ultra-Intense Laser Science Shanghai 201800China College of Physics and Electronics Information Inner Mongolia University for NationalitiesTongliao 028000China Cyclotron institute Texas A&M UniversityCollege StationTX 77843USA Laboratori Nazionali del Sud INFNVia Santa Sofia6295123 CataniaItaly Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China shanghaiTech University Shanghai 201210China shanghai University Shanghai 200444China

Investigating deuteron–deuteron(DD)fusion reactions in a plasma environment similar to the early stages of the Big Bang is an important topic in nuclear *** this study,we experimentally investigated such reactions,using eight laser beams with the third harmonic impacting on a deuterated polyethylene target at the ShenGuang-II Upgrade laser *** work focused on the application of range-filter(RF)spectrometers,assembled from a 70 lm aluminum filter and two CR-39 nuclear track detectors,to measure the yields of primary *** on the track diameter calibration results of 3 MeV protons used to diagnose the tracks on the RF spectrometers,an approximate primary DD-proton yield of(8.5±1.7)×10^6 was obtained,consistent with the yields from similar laser facilities *** indicates that the RF spectrometer is an effective way to measure primary ***,due to the low yields of D^3He-protons and its small track diameter,CR-39 detectors were unable to distinguish it from the background *** other accurate detectors may help to measure these rare events.

关键词： Deuteron-deuteron fusion CR-39 Rangefilter spectrometer DD-proton

Electro-Optically Switchable Optical True Delay Lines of Meter-Scale Lengths Fabricated on Lithium Niobate on Insulator Using Photolithography Assisted Chemo-Mechanical Etching

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chinese Physics Letters 2020年第8期37卷 43-47页

作者： jun-xia zhou Ren-hong Gao Jintian Lin Min Wang Wei Chu Wen-bo Li Di-feng Yin Li Deng Zhi-wei Fang Jian-hao {2. rong-bo Wu and Ya Cheng State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China XXL-The Extreme Optoelectromechanics Laboratory School of Physics and Electronics ScienceEast China Normal UniversityShanghai 200241China State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China University of chinese academy of sciences Beijing 100049China Collaborate CAS Center for Excellence in Ultra-intense Laser Science Shanghai 201800China Innovation Center of Extreme optics Shanxi UniversityTaiyuan 030006China shanghai Research Center for Quantum sciences Shanghai 201315China

Optical true delay lines(OTDLs)of low propagation losses,small footprints and high tuning speeds and efficiencies are of critical importance for various photonic ***,we report fabrication of electro-optically switchable OTDLs on lithium niobate on insulator using photolithography assisted chemo-mechanical *** device consists of several low-loss optical waveguides of different lengths which are consecutively connected by electro-optical switches to generate different amounts of time *** fabricated OTLDs show an ultra-low propagation loss of^0.03dB/cm for waveguide lengths well above 100 cm.

关键词： lithography waveguide tuning

Electron-ion collider in china

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Frontiers of physics 2021年第6期16卷 1-78页

作者： Daniele PAnderle Valerio Bertone xu Cao Lei Chang Ningbo Chang Gu Chen xurong Chen Zhuojun Chen Zhufang Cui Lingyun Dai Weitian Deng Minghui Ding xu Feng Chang Gong Longcheng Gui Feng-Kun Guo Chengdong Han jun He Tie-Jiun Hou Hongxia Huang Yin Huang KrešImir KumeričKi LPKaptari Demin Li Hengne Li Minxiang Li xueqian Li Yutie Liang Zuotang Liang Chen Liu Chuan Liu Guoming Liu Jie Liu Liuming Liu Xiang Liu Tianbo Liu Xiaofeng Luo Zhun Lyu Boqiang Ma Fu Ma Jianping Ma Yugang Ma Lijun Mao Cédric Mezrag HervéMoutarde Jialun Ping Sixue Qin Hang Ren Craig DRoberts Juan Rojo Guodong Shen Chao Shi Qintao Song Hao Sun PawełSznajder Enke Wang Fan Wang Qian Wang rong Wang Ruiru Wang Taofeng Wang Wei Wang Xiaoyu Wang Xiaoyun Wang Jiajun Wu Xinggang Wu Lei Xia Bowen Xiao Guoqing Xiao Ju-jun Xie Yaping Xie Hongxi Xing Hushan xu Nu xu Shusheng xu Mengshi Yan Wenbiao Yan Wencheng Yan Xinhu Yan Jiancheng Yang Yi-Bo Yang Zhi Yang Deliang Yao Zhihong Ye Peilin Yin C-PYuan Wenlong Zhan Jianhui zhang Jinlong zhang Pengming zhang Yifei zhang Chao-Hsi Chang Zhenyu zhang Hongwei Zhao Kuang-Ta Chao Qiang Zhao Yuxiang Zhao Zhengguo Zhao Liang Zheng Jian {12. Xiang {12. Xiaorong {12. Bingsong zou Liping zou Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China IRFU CEAUniversitéParis-SaclayF-91191 Gif-sur-YvetteFrance institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of chinese academy of sciences Beijing 100049China Nankai University Tianjin 300071China Xinyang Normal University Xinyang 464000China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China Hunan University Changsha 410082China Nanjing University Nanjing 210093China Huazhong University of Science and Technology Wuhan 430074China European Centre for Theoretical Studies in Nuclear Physics and Related Areas(ECT*)and Fondazione Bruno Kessler Villa TambosiStrada delle Tabarelle 286I-38123 Villazzano(TN)Italy School of Physics Peking UniversityBeijing 100871China Hunan Normal University Changsha 410081China institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Nanjing Normal University Nanjing 210023China Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Southwest Jiaotong University Chengdu 610000China Department of Physics Faculty of ScienceUniversity of ZagrebBijenička c.3210000 ZagrebCroatia Bogoliubov Laboratory of Theoretical Physics Joint Institute for Nuclear ResearchDubna 141980Russia School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Lanzhou University Lanzhou 730000China Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityQingdao 266237China Key Laboratory of Quark and Lepton Physics(MOE)and institute of Particle Physics Central China Normal UniversityWuhan 430079China School of Physics Southeast UniversityNanjing 211189China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China shanghai institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Depa

Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as *** a future high energy nuclear physics project,an Electron-ion collider in china(EicC)has been *** will be constructed based on an upgraded heavy-ion accelerator,High Intensity heavy-ion Accelerator Facility(HIAF)which is currently under construction,together with a new electron *** proposed collider will provide highly polarized electrons(with a po-larization of 80%)and protons(with a polarization of 70%)with variable center of mass energies from 15 to 2. GeV and the luminosity of(2.3)×1033 cm^(−2.·s^(−1).Polarized deuterons and Helium-3,as well as unpolarized ion beams from Carbon to Uranium,will be also available at the *** main foci of the EicC will be precision measurements of the structure of the nucleon in the sea quark region,including 3D tomography of nucleon;the partonic structure of nuclei and the parton interaction with the nuclear environment;the exotic states,especially those with heavy flavor quark *** addition,issues fundamental to understanding the origin of mass could be addressed by measurements of heavy quarkonia near-threshold production at the *** order to achieve the above-mentioned physics goals,a hermetical detector system will be constructed with cutting-edge *** document is the result of collective contributions and valuable inputs from experts across the *** EicC physics program complements the ongoing scientific programs at the Jefferson Laboratory and the future EIC project in the United *** success of this project will also advance both nuclear and particle physics as well as accelerator and detector technology in china.

关键词： electron ion collider nucleon structure nucleon mass exotic hadronic states quantum chromodynamics 3D-tomography helicity transverse momentum dependent parton distribution generalized parton distribution energy recovery linac polarization spin rotator

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST)

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Research in Astronomy and Astrophysics 2012年第9期12卷 1197-1242页

作者： Xiang-Qun Cui Yong-Heng Zhao Yao-Quan Chu Guo-Ping Li Qi Li Li-Ping zhang Hong-jun Su Zheng-Qiu Yao Ya-Nan Wang Xiao-Zheng Xing Xin-Nan Li Yong-Tian Zhu Gang Wang Bo-Zhong Gu A-Li Luo Xin-Qi xu Zhen-Chao zhang Gen-rong Liu Hao-Tong zhang De-Hua Yang Shu-Yun Cao Hai-Yuan Chen Jian-jun Chen Kun-Xin Chen Ying Chen Jia-Ru Chu Lei Feng xue-Fei Gong Yong-Hui Hou Hong-Zhuan Hu Ning-Sheng Hu Zhong-Wen Hu Lei Jia Fang-Hua Jiang Xiang Jiang Zi-Bo Jiang Ge Jin Ai-Hua Li Yan Li Ye-Ping Li Guan-QunLiu Zhi-Gang Liu Huo-Ming Shi Zheng-Hong Tang Qing-Sheng Tao Xiang-Yan Yuan Chao Zhai Jing zhang Yan-Xia zhang Yong zhang Ming Zhao Fang zhou Guo-Hua zhou Jie Zhu Si-Cheng zou National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China yzhao @ *** Nanjing institute of Astronomical optics and Technology National Astronomical ObservatoriesChinese Academy of Sciences Nanjing 210042 China University of Science and Tecfinologyof china Hefei 230026 China shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China institute of Architecture Design and Research Chinese Academy of Sciences Beijing 100190China

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST, also called the Guo Shou Jing Telescope) is a special reflecting Schmidt telescope. LAMOST’s special design allows both a large aperture (effective aperture of 3.6 m–4.9 m) and a wide field of view (FOV) (5°). It has an innovative active reflecting Schmidt configuration which continuously changes the mirror’s surface that adjusts during the observation process and combines thin deformable mirror active optics with segmented active optics. Its primary mirror (6.67m×6.05 m) and active Schmidt mirror (5.74m×4.40 m) are both segmented, and composed of 37 and 2. hexagonal sub-mirrors respectively. By using a parallel controllable fiber positioning technique, the focal surface of 1.75 m in diameter can accommodate 4000 optical fibers. Also, LAMOST has 16 spectrographs with 32.CCD cameras. LAMOST will be the telescope with the highest rate of spectral acquisition. As a national large scientific project, the LAMOST project was formally proposed in 1996, and approved by the {2. government in 1997. The construction started in 2.01, was completed in 2.08 and passed the official acceptance in june 2.09. The LAMOST pilot survey was started in October 2.11 and the spectroscopic survey will launch in September 2.12. Up to now, LAMOST has released more than 480 000 spectra of objects. LAMOST will make an important contribution to the study of the large-scale structure of the Universe, structure and evolution of the Galaxy, and cross-identification of multiwaveband properties in celestial objects.

关键词： techniques: wide field telescope - active optics - multi fiber - spectroscopy survey - data reduction

Measurements of absolute electron capture cross sections in He^(2.)–He and Ne^(8+)–O_(2.), N_(2.), CH_4 collisions

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Nuclear Science and Techniques 2023年第10期34卷 126-135页

作者： Pu-Fang Ma Jia-rong Wang Zi-Xiao zhang Tian-Ming Meng Zi-Han Xia Bai-Hui Ren Long Wei Ke Yao {2. Xiao Ya-Ming zou Bing-Sheng Tu Bao-Ren Wei institute of Modern Physics Department of Nuclear Science and TechnologyFudan UniversityShanghai 200433China Key Laboratory of Nuclear Physics and Ion‑Beam Application(MOE) Fudan UniversityShanghai 200433China

The total absolute cross sections of single-and double-electron capture (SEC and DEC) in the collisions of He^(2.)with He and Ne^(8+)with O_(2.,N_(2.,and CH_(4) were studied in the energy ranges 3.5–50 keV/u and 2.8–40 keV/u,*** a deep analysis of the experimental systematic uncertainties in the measurement procedure and data evaluation,the error in the experimental results of the SEC cross sections is less than 9%.Within the uncertainties,the present results of the He^(2.)–He collision show good consistency with previous measurements,validating the experimental system and paving the way for precise measurements of EC cross sections for a variety of ions and neutral *** present measurements allow for a test of EC theory and provide crucial EC cross section data for the establishment of plasma models in fusion research and astrophysical X-ray studies.

关键词： Highly charged ions Cross section Electron capture Charge exchange

XELOX doublet regimen versus EOX triplet regimen as first-line treatment for advanced gastric cancer:An open-labeled,multicenter,randomized,prospective phase III trial(EXELOX)

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Cancer Communications 2022年第4期42卷 314-326页

作者： Xiao-Dong Zhu Ming-Zhu Huang Yu-Sheng Wang Wan-Jing Feng Zhi-Yu Chen Yi-Fu He Xiao-Wei zhang Xin Liu Chen-Chen Wang Wen zhang Jie-Er Ying {2. Wu Lei Yang Yan-Ru Qin Jian-Feng Luo Xiao-Ying Zhao Wen-Hua Li Zhe zhang Li-Xin Qiu Qi-rong Geng Jian-Ling zou Jie-Yun zhang Hong Zheng xue-Feng Song Shu-Sheng Wu Cheng-Yan zhang Zhe Gong Qin-Qin Liu Xiao-Feng Wang Qi xu Qi Wang Jian-Mei Ji Jian Zhao Wei-Jian Guo Department of Gastrointestinal Medical Oncology Fudan University Shanghai Cancer CenterShanghai 200032P.R.China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032P.R.China Department of Gastroenterology Shanxi Cancer HospitalTaiyuanShanxi 030013P.R.China Department of Medical Oncology The First Affiliated HospitalDivision of Life Science and MedicineUniversity of Science and Technology of ChinaHefeiAnhui 230031P.R.China Department of Abdominal Medical Oncology Cancer Hospital of the University of Chinese Academy of Sciences(Zhejiang Cancer Hospital)Institute of Cancer and Basic Medicine(IBMC)Chinese Academy of SciencesHangzhouZhejiang 310005P.R.China Department of Medical Oncology The First People’s Hospital of ChangzhouChangzhouJiangsu 213004P.R.China Department of Gastroenterology Nantong Tumor HospitalNantongJiangsu 226006P.R.China Department of Oncology Zhengzhou University First Affiliated HospitalZhengzhouHenan 450052P.R.China Department of Biostatistics School of Public HealthFudan UniversityShanghai 200032P.R.China Department of medical oncology Cancer Hospital of Fudan UniversityMinhang BranchShanghai 200032P.R.China

Background:There is no consensus on whether triplet regimen is better than doublet regimen in the first-line treatment of advanced gastric cancer(AGC).We aimed to compare the efficacy and safety of oxaliplatin plus capecitabine(XELOX)and epirubicin,oxaliplatin,plus capecitabine(EOX)regimens in treating ***:This phase III trial enrolled previously untreated patients with AGC whowere randomly assigned to receive the XELOXor *** primary endpoint was non-inferiority in progression-free survival(PFS)for XELOX as compared with EOX on an intention-to-treat ***:Between April 10,2.15 andAugust 2.,2.2.,448AGCpatientswere randomized to receive XELOX(n=2.2.or EOX(n=2.6).The median PFS(mPFS)was 5.0 months(95%confidence interval[CI]=4.5-6.0 months)in the XELOX arm and 5.5 months(95%CI=5.0-6.0 months)in the EOX arm(hazard ratio[HR]=0.989,95%CI=0.812.1.2.3;P_(non-inferiority)=0.003).There was no significant difference inmedian overall survival(mOS)(12.0 vs.12.0months,P=0.384)or objective response rate(37.4%vs.45.1%,P=0.2.1)between the two *** patients with poorly differentiated adenocarcinoma and liver metastasis,the EOX arm had a significantly longer mOS(P=0.02.)and a trend of longer mPFS(P=0.073)than the XELOX *** rate of grade 3/4 adverse events(AEs)was 42.2.(90/2.3)in the XELOX arm and 72.5%(156/2.5)in the EOX arm(P=0.001).The global health-related quality of life(QoL)score was significantly higher in the XELOX arm than in the EOX arm during ***:This non-inferiority trial demonstrated that the doublet regimen was as effective as the triplet regimen and had a better safety profile and QoL as a first-line treatment for AGC ***,the triplet regimen might have a survival advantage in patients with poorly differentiated adenocarcinoma and liver metastasis.

关键词： Advanced gastric cancer chemotherapy XELOX doublet regimen EOX triplet regimen noninferiority quality of life phase III trial

LAMOST medium-resolution spectral survey of Galactic nebulae(LAMOST-MRS-N):subtraction of geocoronal Hαemission

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Research in Astronomy and Astrophysics 2021年第11期21卷 89-97页

作者： Wei zhang Hong Wu Chao-Jian Wu Juan-Juan Ren Jian-jun Chen Chih-Hao Hsia Yu-Zhong Wu Hui Zhu Jian-{2. Shi Zhong-Rui Bai Zhao-Xiang Qi Yong-Heng Zhao Yong-Hui Hou CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China State Key Laboratory of Lunar and Planetary sciences Macao University of Science and TechnologyTaipaMacaoChina shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Nanjing institute of Astronomical optics&Technology National Astronomical ObservatoriesChinese Academy of SciencesNanjing 210042China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

We introduce a method of subtracting geocoronal Hαemissions from the spectra of LAMOST medium-resolution spectral survey of Galactic nebulae(LAMOST-MRS-N).The flux ratios of the Hαsky line to the adjacent OHλ6554 single line do not show a pattern or gradient distribution in a *** interestingly,the ratio is well correlated to solar altitude,which is the angle of the Sun relative to the Earth’s *** is found that the ratio decreases from 0.8 to 0.2.with the decreasing solar altitude from–17 to–73 *** on this relation,which is described by a linear function,we can construct the Hαsky component and subtract it from the science *** method has been applied to the LAMOST-MRSN data,and the contamination level of the Hαsky to nebula is reduced from 40%to less than 10%.The new generated spectra will significantly improve the accuracy of the classifications and the measurements of physical parameters of Galactic nebulae.

关键词： techniques:spectroscopic instrumentation:spectrographs ISM:general

Introduction to the Payloads and the Initial Observation Results of Chang'E-1

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空间科学学报 2008年第5期28卷 374-384页

作者： SUN Huixian WU Ji DAI Shuwu ZHAO Baochang SHU rong CHANG Jin WANG Huanyu zhang Xiaohui REN Qiongying CHEN Xiaomin OUYANG Ziyuan {2. Yongliao Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100190 Xi＇an institute of optics and Precision {2. Chinese Academy of Sciences shanghai institute of Technical Physics Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences institute of High Energy Physics Chinese Academy of Sciences National Astronomy Observatory Chinese Academy of Sciences

Chang'E-1,the orbiter circling the moon 2.0km above the moon surface,is the first chinese Lunar exploration *** satellite was successfully launched on 2.th October *** are 8 kinds of scientific payloads onboard,including the stereo camera,the laser altimeter,the Sagnac-based interferometer image spectrometer,the Gamma ray spectrometer,the X-ray spectrom-eter,the microwave radiometer,the high energy particle detector,the solar wind plasma detector and a supporting payload data management ***'E-1 opened her eyes to look at the moon and took the first batch of lunar pictures after her stereo camera was switched on in 2.th November *** all the instruments are successfully switched on one by *** a period of parameter adjustment and initial check out,all scientific instruments are now in their normal operating *** this paper,the payloads and the initial observation results are introduced.

关键词：有效载荷嫦娥一号空间技术分光计微波技术

The first data release(DR1) of the LAMOST regular survey

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Research in Astronomy and Astrophysics 2015年第8期15卷 1095-1124页

作者： A-Li Luo Yong-Heng Zhao Gang Zhao Li-Cai Deng Xiao-Wei Liu Yi-Peng Jing Gang Wang Hao-Tong zhang Jian-rong Shi Xiang-Qun Cui Yao-Quan Chu Guo-Ping Li Zhong-Rui Bai Yue Wu Yan Cai Shu-Yun Cao Zi-Huang Cao Jeffrey L.Carlin Hai-Yuan Chen Jian-{2. Chen Kun-Xin Chen Li Chen xue-Lei Chen Xiao-Yan Chen Ying Chen Norbert Christlieb Jia-Ru Chu Chen-zhou Cui Yi-Qiao Dong Bing Du Dong-Wei Fan Lei Feng Jian-Ning Fu Peng Gao xue-Fei Gong Bo-Zhong Gu Yan-Xin Guo Zhan-Wen Han Bo-Liang He Jin-Liang Hou Yong-Hui Hou Wen Hou Hong-Zhuan Hu Ning-Sheng Hu Zhong-Wen Hu Zhi-Ying Huo Lei Jia Fang-Hua Jiang Xiang Jiang Zhi-Bo Jiang Ge Jin Xiao Kong xu Kong Ya-Juan Lei Ai-Hua Li Chang-Hua Li Guang-Wei Li Hai-Ning Li Jian Li Qi Li Shuang Li Sha-Sha Li Xin-Nan Li Yan Li Yin-Bi Li Ye-Ping Li Yuan Liang Chien-Cheng Lin Chao Liu Gen-rong Liu Guan-Qun Liu Zhi-Gang Liu Wen-Zhi Lu Yu Luo Yin-Dun Mao Heidi Newberg Ji-{2. Ni Zhao-Xiang Qi Yong-{2. Qi Shi-Yin Shen Huo-Ming Shi Jing Song Yi-Han Song Ding-Qiang Su Hong-{2. Su Zheng-Hong Tang Qing-Sheng Tao Yuan Tian Dan Wang Da-Qi Wang Feng-Fei Wang Guo-Min Wang Hai Wang Hong-Chi Wang Jian Wang Jia-Ning Wang Jian-Ling Wang Jian-Ping Wang {2.-Xian Wang Lei Wang Meng-Xin Wang Shou-Guan Wang Shu-Qing Wang Xia Wang Ya-Nan Wang You Wang Yue-Fei Wang You-Fen Wang Peng Wei Ming-Zhi Wei Hong Wu Ke-Fei Wu xue-Bing Wu Yu-Zhong Wu Xiao-Zheng Xing Ling-Zhe xu Xin-Qi xu Yan xu Tai-Sheng Yan De-Hua Yang Hai-Feng Yang Hui-Qin Yang Ming Yang Zheng-Qiu Yao Yong Yu Hui Yuan Hai-Bo Yuan Hai-Long Yuan Wei-Min Yuan Chao Zhai En-Peng zhang Hua-Wei zhang Jian-Nan zhang Li-Pin zhang Wei zhang Yong zhang Yan-Xia zhang Zheng-Chao zhang Ming Zhao Fang zhou xu zhou Jie Zhu Yong-Tian Zhu Si-Cheng zou Fang Zuo National Astronomical Observatories Chinese Academy of Sciences Department of Astronomy Peking University shanghai Astronomical Observatory Chinese Academy of Sciences Nanjing institute of Astronomical optics & Technology National Astronomical ObservatoriesChinese Academy of Sciences University of Science and Technology of china Department of Physics Applied Physics and AstronomyRensselaer Polytechnic InstituteTroyNY 12180USA Department of Physics and Astronomy Earlham CollegeRichmondIN 47374USA Universitt Heidelberg Zentrum für AstronomieLandessternwarteKnigstuhl 1269117 HeidelbergGermany Department of Astronomy Beijing Normal University Yunnan Observatories Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences

The Large sky Area Multi-Object Fiber Spectroscopic Telescope（LAMOST） general survey is a spectroscopic survey that will eventually cover approximately half of the celestial sphere and collect 10 million spectra of stars, galaxies and QSOs. Objects in both the pilot survey and the first year regular survey are included in the LAMOST DR1. The pilot survey started in October 2.11 and ended in june 2.12. and the data have been released to the public as the LAMOST Pilot Data Release in August 2.12. The regular survey started in September 2.12. and completed its first year of operation in june 2.13. The LAMOST DR1 includes a total of 12.2.plates containing 2.955 336 spectra, of which 1 790 879 spectra have observed signalto-noise ratio（SNR） ≥ 10. All data with SNR ≥ 2.are formally released as LAMOST DR1 under the LAMOST data policy. This data release contains a total of 2.2.4 696 spectra, of which 1 944 32. are stellar spectra, 12.082.are galaxy spectra and 5017 are quasars. The DR1 not only includes spectra, but also three stellar catalogs with measured parameters： late A,FGK-type stars with high quality spectra（1 061 918 entries）, A-type stars（100 073 entries）, and M-type stars（12. 52. entries）. This paper introduces the survey design, the observational and instrumental limitations, data reduction and analysis, and some caveats. A description of the FITS structure of spectral files and parameter catalogs is also provided.

关键词： techniques: spectroscopic survey—data release—catalog