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fAST Observations of an Extremely Active Episode of fRb 20201124A:Ⅰ.burst morphology

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Research in Astronomy and Astrophysics 2022年第12期22卷 54-69页

作者： D.j.Zhou j.L.han b.Zhang K.j.Lee W.W.Zhu D.Li W.c.jing W.-y.wang y.K.Zhang j.c.jiang j.R Niu R Luo h.xu c.f.Zhang b.j.wang j.W.xu P.wang Z.L.yang y.f.ng National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy University of Chinese Academy of SciencesBeijing 100049China cAS Key Laboratory of fAST NAOCChinese Academy of SciencesBeijing 100101China Department of Physics and Astronomy University of NevadaLas VegasNV 89154USA Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy Peking UniversityBeijing 100871China cSIRO Space and Astronomy EppingNSW 1710Australia Research center for Intelligent computing Platforms Zhejiang LaboratoryHangzhou 311100China

We report the properties of more than 600 bursts(including cluster-bursts)detected from the repeating fast radio burst(fRb)source fRb 20201124A with the five-hundred-meter Aperture Spherical radio Telescope during an extremely active episode on UTc 2021 September 25–28,in a series of four *** observations were carried out in the band of 1.0–1.5 Ghz by using the center beam of the L-band 19-beam *** monitored the source in sixteen1 hr sessions and one 3 hr session spanning 23 *** the bursts were detected during the first four *** this first paper of the series,we perform a detailed morphological study of 624 bursts using the two-dimensional frequencytime“waterfall”plots,with a burst(or cluster-burst)defined as an emission episode during which the adjacent emission peaks have a separation shorter than 400 *** duration of a burst is therefore always longer than 1 ms,with the longest up to more than 120 *** emission spectra of the sub-bursts are typically narrow within the observing band with a characteristic width of~277 *** center frequency distribution has a dominant peak at about 1091.9 mhz and a secondary weak peak around 1327.9 *** bursts show a frequencydownwarddrifting *** on the drifting patterns,we classify the bursts into five main categories:downward drifting(263)bursts,upward drifting(3)bursts,complex(203),no drifting(35)bursts,and no evidence for drifting(121)*** are introduced based on the emission frequency range in the band(low,middle,high and wide)as well as the number of components in one burst(1,2,or multiple).We measured a varying scintillation bandwidth from about 0.5 mhz at 1.0 Ghz to 1.4 mhz at 1.5 Ghz with a spectral index of 3.0.

关键词： (stars:)pulsars:general Physical Data and Processes stars:individual(fRb 20201124A)

Improving cyclic oxidation resistance of Ni_(3)Al-based single crystal superalloy with low-diffusion platinum-modified aluminide coating

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journal of materials Science & Technology 2020年第19期54卷 132-143页

作者： h.Liu m.m.xu S.Li Z.b.bao S.L.Zhu f.h.wang Institute of metal Research Chinese Academy of SciencesWencui Road 62#Shenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaJinzhai Road 96#Hefei 230026China Shenyang National Laboratory.f.r materials Science Northeastern UniversityWenhua Road 3#Shenyang 110819China

A low-diffusion Ni Re Pt Al coating((Ni,Pt)Al outer layer in addition to a Re-rich diffusion barrier layer)was prepared on a Ni_(3)Al-base single crystal(Sc)superalloy via electroplating and gaseous aluminizing treatments,wherein the electroplating procedures consisted of the composite deposition of Ni-Re followed by electroplating of *** order to perform a comparison with conventional Ni Al and(Ni,Pt)Al coatings,the cyclic oxidation performance of the Ni Re Pt Al coating was evaluated at 1100 and 1150℃.We observed that the oxidation resistance of the Ni Re Pt Al coating was significantly improved by the greater presence of the residualβ-Ni Al phase in the outer layer and the lesser outward-diffusion of mo from the *** addition,the coating with the Re-rich diffusion barrier demonstrated a lower extent of interdiffusion into the substrate,where the thickness of the second reaction zone(SRZ)in the substrate alloy decreased by 25%.The mechanisms responsible for improving the oxidation resistance and decreasing the extent of SRZ formation are discussed,in which a particular attention is paid to the inh.b.tion of the outward diffusion of mo by the Re-based diffusion barrier.

关键词： Ni_(3)Al-base superalloy Pt-modified aluminide coating Re-rich diffusion barrier cyclic oxidation Interdiffusion Second reaction zone

Ion motion effects on the generation of short-cycle relativistic laser pulses during radiation pressure acceleration

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high Power Laser Science and Engineering 2014年第2期2卷 1-7页

作者： W.P.wang X.m.Zhang X.f.wang X.y.Zhao j.c.xu y.h.yu L.Q.yi y.Shi L.G.Zhang T.j.xu c.Liu Z.K.Pei b.f.Shen State Key Laboratory of high field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

The effects of ion motion on the generation of short-cycle relativistic laser pulses during radiation pressure acceleration are investigated by analytical modeling and particle-in-cell simulations. Studies show that the rear part of the transmitted pulse modulated by ion motion is sharper compared with the case of the electron shutter only. In this study, the ions further modulate the short-cycle pulses transmitted. A 3.9 fs laser pulse with an intensity of 1.33×1021W cm-2is generated by properly controlling the motions of the electron and ion in the simulations. The short-cycle laser pulse source proposed can be applied in the generation of single attosecond pulses and electron acceleration in a small bubble regime.

关键词： radiation pressure acceleration short-cycle pulses particle-in-cell simulations.

The Lobster Eye Imager for Astronomy Onboard the SATech-01 Satellite

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Research in Astronomy and Astrophysics 2023年第9期23卷 66-78页

作者： Z.X.Ling X.j.Sun c.Zhang S.L.Sun G.jin S.N.Zhang X.f.Zhang j.b.chang f.S.chen y.f.chen Z.W.cheng W.fu y.X.han h.Li j.f.Li y.Li Z.D.Li P.R.Liu y.h.Lv X.h.ma y.j.Tang c.b.wang R.j.Xie y.L.xue A.L.yan Q.Zhang c.y.bao h.b.cai h.Q.cheng c.Z.cui y.f.Dai D.W.fan h.b.hu j.W.hu m.h.huang Z.Q.jia c.c.jin D.y.Li j.Q.Li h.y.Liu m.j.Liu y.Liu h.W.Pan y.L.Qiu m.Sugizaki h.Sun W.X.wang y.L.wang Q.y.Wu X.P.xu y.f.xu h.N.yang X.yang b.Zhang m.Zhang W.D.Zhang Z.Zhang D.h.Zhao X.Q.cong b.W.jiang L.h.Li X.b.Qiu j.N.Sun D.T.Su j.wang c.Wu Z.xu X.m.yang S.K.Zhang Z.Zhang N.Zhang y.f.Zhu h.y.ban X.Z.bi Z.m.cai W.chen X.chen y.h.chen y.cui X.L.Duan Z.G feng y.Gao j.W.he T.he j.j.huang f.Li j.S.Li T.j.Li T.T.Li h.Q.Liu L.Liu R.Liu S.Liu N.meng Q.Shi A.T.Sun y.m.wang y.b.wang h.c.Wu D.X xu y.Q yang y.yang X.S.yu K.X.Zhang y.L.Zhang y.h.Zhang y.T.Zhang h.Zhou X.c.Zhu j.S.cheng L.Qin L.wang Q.L.wang m.bai R.L.Gao Z.ji y.R.Liu f.L.ma y.j.Shi j.Su y.y.Tan j.Z.Tong h.T.xu c.b.xue G.f.xue W.yuan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China North Night Vision Technology co. LTDNanjing 211106China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Science and Technology on Low-Light-Level Night Vision Laboratory Xi'an 710065China Innovation Academy.f.r microsatellites Chinese Academy of SciencesShanghai 201204China Institute of Electrical Engineering Chinese Academy of ScienceBeijing 100190China National Space Science center Chinese Academy of ScienceBeijing 100190China

The Lobster Eye Imager for Astronomy(LEIA),a pathfinder of the Wide-field X-ray Telescope of the Einstein Probe mission,was successfully launched onboard the SATech-01 satellite of the chinese Academy of Sciences on2022 july *** this paper,we introduce the design and on-ground test results of the LEIA *** stateof-the-art micro-Pore Optics(mPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the X-ray imager is *** optical assembly composed of 36 mPO chips is used to focus incident X-ray photons,and four large-format complementary metal-oxide semiconductor(cmOS)sensors,each of size 6 cm×6 cm,are used as the focal plane *** instrument has an angular resolution of 4’-8’(in terms of fWhm)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of *** detection passband is 0.5-4 keV in soft X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 millicrab)with a 1000 s *** total weight of LEIA is 56 kg and the power is 85 *** satellite,with a design lifetime of 2 yr,operates in a Sun-synchronous orbit of 500 km with an orbital period of 95 *** is paving the way.f.r future missions by verifying in flight the technologies of both novel focusing imaging optics and cmOS sensors for X-ray observation,and by optimizing the working setups of the instrumental *** addition,LEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft X-ray band,albeit with limited useful observing time available.

关键词： instrumentation detectors-space vehicles instruments-telescopes-X-rays genera

Geometrical reconstruction of fluorescence events observed by the LhAASO experiment

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chinese Physics c 2021年第4期45卷 416-425页

作者： f.Aharonian Q.An Axikegu L.X.bai y.X.bai y.W.bao D.bastieri X.j.bi y.j.bi h.cai j.T.cai Z.cao Z.cao j.chang j.f.chang X.c.chang b.m.chen j.chen L.chen L.chen L.chen m.j.chen m.L.chen Q.h.chen S.h.chen S.Z.chen T.L.chen X.L.chen y.chen N.cheng y.D.cheng S.W.cui X.h.cui y.D.cui b.Z.Dai h.L.Dai Z.G.Dai Danzengluobu D.della Volpe b.DEtorre Piazzoli X.j.Dong j.h.fan y.Z.fan Z.X.fan j.fang j.fang c.f.feng L.feng S.h.feng y.L.feng b.Gao c.D.Gao Q.Gao W.Gao m.m.Ge L.S.Geng G.h.Gong Q.b.Gou m.h.Gu j.G.Guo X.L.Guo y.Q.Guo y.y.Guo y.A.han h.h.he h.N.he j.c.he S.L.he X.b.he y.he m.heller y.K.hor c.hou X.hou h.b.hu S.hu S.c.hu X.j.hu D.h.huang Q.L.huang W.h.huang X.T.huang Z.c.huang f.ji X.L.ji h.y.jia K.jiang Z.j.jiang c.jin D.Kuleshov K.Levochkin b.b.Li c.Li c.Li f.Li h.b.Li h.c.Li h.y.Li j.Li K.Li W.L.Li X.Li X.Li X.R.Li y.Li y.Z.Li Z.Li Z.Li E.W.Liang y.f.Liang S.j.Lin b.Liu c.Liu D.Liu h.Liu h.D.Liu j.Liu j.L.Liu j.L.Liu j.S.Liu j.y.Liu m.y.Liu R.y.Liu S.m.Liu W.Liu y.N.Liu Z.X.Liu W.j.Long R.Lu h.K.Lv b.Q.ma L.L.ma X.h.ma j.R.mao A.masood W.mitthumsiri T.montaruli y.c.Nan b.y..Pang P.Pattarakijwanich Z.y.Pei m.y.Qi D.Ruffolo V.Rulev A.Saiz L.Shao O.Shchegolev X.D.Sheng j.R.Shi h.c.Song yu.V.Stenkin V.Stepanov Q.N.Sun X.N.Sun Z.b.Sun P.h.T.Tam Z.b.Tang W.W.Tian b.D.wang c.wang h.wang h.G.wang j.c.wang j.S.wang L.P.wang L.y.wang R.N.wang W.wang W.wang X.G.wang X.j.wang X.y.wang y.D.wang y.j.wang y.P.wang Z.wang Z.wang Z.h.wang Z.X.wang D.m.Wei j.j.Wei y.j.Wei T.Wen c.y.Wu h.R.Wu S.Wu W.X.Wu X.f.Wu S.Q.Xi j.Xia j.j.Xia G.m.Xiang G.Xiao h.b.Xiao G.G.Xin y.L.Xin y.Xing D.L.xu R.X.xu L.xue D.h.yan c.W.yang f.f.yang j.y.yang L.L.yang m.j.yang R.Z.yang S.b.yang y.h.yao Z.G.yao y.m.ye L.Q.yin N.yin X.h.you Z.y.you y.h.yu Q.yuan h.D.Zeng T.X.Zeng W.Zeng Z.K.Zeng m.Zha X.X.Zhai b.b.Zhang h.m.Zhang h.y.Zhang j.L.Zhang j.W.Zhang L.Zhang L.Zhang L.X.Zhang P.f.Zhang P.f.Zhang R.Zhang S.R.Zhang S.S.Zhang X.Zhang X.P.Zhang y.Zhang y.Zhang y.f.Zhang y.L.Zhang b.Zhao j.Zhao L.Zhao L.Z.Zhao S.P.Zhao f.Zheng y.Zheng b.Zhou h.Zhou j.N.Zhou P Key Laboratory of Particle Astrophyics&Experimental Physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of chinese Academy of Sciences Beijing 100049China TIANfU cosmic Ray Research center ChengduSichuanChina State Key Laboratory of Paricle Detection and Electronics China University of Science and Technology of china HefeiAnhui 230026China Department of Engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National Space Science center Chinese Academy of SciencesBeijing 100190China School of Physics Peking UniversityBeijing 100871China center for Astrophysics Guangzhou UniversityGuangzhouGuangdong 510006China School of Physics and Astronomy&School of Physics(Guangzhou) Sun Yat-sen UniversityZhuhaiGuangdong 519000China School of Physical Science and Technology Guangxi UniversityNanningGuangxi 530004China h.b.i Normal University ShijiazhuangHebei 050024China School of Physics and microelectronics Zhengzhou UniversityZhengzhouHenan 450001China School of Astronomy and Space Science Nanjing UniversityNanjingJiangsu 210023China Key Laboratory of Dark matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China Institute of frontier and Interdisciplinary Science Shandong UniversityQingdaoShandong 266237China Key Laboratory.f.r Research in Galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China School of Physical Science and Technology Southwest Jiaotong UniversityChengduSichuan 610031China college of Physics Sichuan UniversityChengduSichuan 610065China Key Laboratory of cosmic Rays(Tibet University) Ministry of EducationLhasaTibet 850000China School of physics and technology Wuhan UniversityWuhanHubei 430072Ch

The LhAASO-WfcTA experiment,which aims to observe cosmic rays in the sub-EeV range using the fluorescence technique,uses a new generation of high-performance *** ensure that the experiment has ex-cellent detection capability associated with the measurement of the energy spectrum,the primary composition of cosmic rays,and so on,an accurate geometrical reconstruction of air-shower events is *** paper de-scribes the development and testing of geometrical reconstruction for stereo viewed events using the WfcTA(Wide field of view cherenkov/fluorescence Telescope Array)*** approaches,which take full advantage ofthe WfcTA *** *** is the stereo-angular method,which uses the pointing of triggered SiPms in the shower trajectory,and the other is the stereo-timing method,which uses the triggering time of the fired *** results show that both methods have good geometrical resolution:the resolution of the stereo-timing method is slightly better than the stereo-angular method because the resolution of the latter is slightly limited by the shower track length.

关键词： cosmic ray fluorescence telescope stereo observation geometrical reconstruction

A Novel Design and fabrication of magnetic Random Access memory based on Nano-ring-type magnetic Tunnel junctions

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journal of materials Science & Technology 2007年第3期23卷 304-306页

作者： X.f.han h.X.Wei Z.L.Peng h.D.yang j.f.feng G.X.Du Z.b.Sun L.X.jiang Q.h.Qin m.ma y.wang Z.c.Wen D.P.Liu W.S.Zhan State Key Laboratory of magnetism Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Science Beijing 100080 China

Nano-ring-type magnetic tunnel junctions （NR-mTjs） with the layer structure of Ta（5）/Ir22mn78（10）/ co75fe25（2）/Ru（0.75）/cooofe20b20（3）/Al（0.6）-oxide/co60fe20b20（2.5）/Ta（3）/Ru（5）（thickness unit： nm） were nano-fabricated on the Si（100）/SiO2 substrate using magnetron sputtering deposition combined with the optical lithography, electron beam lithography （EbL） and Ar ion-beam etching techniques. The smaller NR-mTjs with the inner- and outer-diameter of around 50 and 100 nm and also their corresponding NR-mTj arrays were nano-patterned. The tunnelling magnetoresistance （TmR ＆ R） versus driving current （I） loops for a spin-polarized current switching were measured, and the TmR ratio of around 35% at room temperature were observed. The critical values of switching current for the free co60fe20b20 layer relative to the reference co6ofe2ob2o layer between parallel and anti-parallel magnetization states were between 0.50 and 0.75 mA in such NR-mTjs. It is suggested that the applic.b.e mRAm fabrication with the density and capacity higher than 256 mbit/inch2 even 6 Gbite/inch2 are possible using both I NR-mTj＋1 transistor structure and current switching mechanism based on based on our fabricated 4×4 mRAm demo devices.

关键词： Nano-ring-type magnetic tunnel junctions NR-mTj mRAm spin polarization Spin transfer effect

Observation of the crab Nebula with LhAASO-Km2A−a performance study

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chinese Physics c 2021年第2期45卷 518-530页

作者： f.Aharonian Q.An Axikegu L.X.bai y.X.bai y.W.bao D.bastieri X.j.bi y.j.bi h.cai j.T.cai Z.cao j.chang j.f.chang X.c.chang b.m.chen j.chen L.chen m.j.chen m.L.chen Q.h.chen S.h.chen S.Z.chen T.L.chen X.L.chen y.chen N.cheng y.D.cheng S.W.cui X.h.cui y.D.cui b.Z.Dai h.L.Dai Z.G.Dai D.della Volpe b.D'Ettorre Piazzoli X.j.Dong j.h.fan y.Z.fan Z.X.fan j.fang K.fang c.f.feng L.feng S.h.feng y.L.feng b.Gao c.D.Gao Q.Gao W.Gao m.m.Ge L.S.Geng G.h.Gong Q.b.Gou m.h.Gu j.G.Guo X.L.Guo y.Q.Guo y.y.Guo y.A.han h.h.he h.N.he j.c.he S.L.he X.b.he y.he m.heller y.K.hor c.hou X.hou h.b.hu S.hu S.c.hu X.j.hu D.h.huang Q.L.huang W.h.huang X.T.huang Z.c.huang f.ji X.L.ji h.y.jia K.jiang Z.j.jiang c.jin D.Kuleshov K.Levochkin b.b.Li c.Li f.Li h.b.Li h.c.Li h.y.Li j.Li K.Li W.L.Li X.Li X.R.Li y.Li y.Z.Li Z.Li E.W.Liang y.f.Liang S.j.Lin b.Liu c.Liu D.Liu h.Liu h.D.Liu j.Liu j.L.Liu j.S.Liu j.y.Liu m.y.Liu R.y.Liu S.m.Liu W.Liu y.N.Liu Z.X.Liu W.j.Long R.Lu h.K.Lv b.Q.ma L.L.ma X.h.ma j.R.mao A.masood W.mitthumsiri T.montaruli y.c.Nan b.y.Pang P.Pattarakijwanich Z.y.Pei m.y.Qi D.Ruffolo V.Rulev A.Sáiz L.Shao O.Shchegolev X.D.Sheng j.R.Shi h.c.Song yu.V.Stenkin V.Stepanov Q.N.Sun X.N.Sun Z.b.Sun P.h.T.Tam Z.b.Tang W.W.Tian b.D.wang c.wang h.wang h.G.wang j.c.wang j.S.wang L.P.wang L.y.wang R.N.wang W.wang X.G.wang X.j.wang X.y.wang y.D.wang y.j.wang y.P.wang Z.wang Z.h.wang Z.X.wang D.m.Wei j.j.Wei y.j.Wei T.Wen c.y.Wu h.R.Wu S.Wu W.X.Wu X.f.Wu S.Q.Xi j.Xia j.j.Xia G.m.Xiang G.Xiao h.b.Xiao G.G.Xin y.L.Xin y.Xing D.L.xu R.X.xu L.xue D.h.yan c.W.yang f.f.yang j.y.yang L.L.yang m.j.yang R.Z.yang S.b.yang y.h.yao Z.G.yao y.m.ye L.Q.yin N.yin X.h.you Z.y.you y.h.yu Q.yuan h.D.Zeng T.X.Zeng W.Zeng Z.K.Zeng m.Zha X.X.Zhai b.b.Zhang h.m.Zhang h.y.Zhang j.L.Zhang j.W.Zhang L.Zhang L.X.Zhang P.f.Zhang P.P.Zhang R.Zhang S.R.Zhang S.S.Zhang X.Zhang X.P.Zhang y.Zhang y.f.Zhang y.L.Zhang b.Zhao j.Zhao L.Zhao L.Z.Zhao S.P.Zhao f.Zheng y.Zheng b.Zhou h.Zhou j.N.Zhou P.Zhou R.Zhou X.X.Zhou c.G.Zhu f.R.Zhu h.Zhu K.j.Zhu X.Zuo Key Laboratory of Particle Astrophyics&Experimental Physics Division&computing center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina University of chinese Academy of Sciences 100049 BeijingChina TIANfU cosmic Ray Research center ChengduSichuanChina State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of china 230026 HefeiAnhuiChina Department of Engineering Physics Tsinghua University100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National Space Science center Chinese Academy of Sciences100190 BeijingChina School of Physics Peking University100871 BeijingChina center for Astrophysics Guangzhou University510006 GuangzhouGuangdongChina School of Physics and Astronomy&School of Physics(Guangzhou) Sun Yat-sen University519000 ZhuhaiGuangdongChina School of Physical Science and Technology Guangxi University530004 NanningGuangxiChina h.b.i Normal University 050024 ShijiazhuangHebeiChina School of Physics and microelectronics Zhengzhou University450001 ZhengzhouHenanChina School of Astronomy and Space Science Nanjing University210023 NanjingJiangsuChina Key Laboratory of Dark matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina Institute of frontier and Interdisciplinary Science Shandong University266237 QingdaoShandongChina Key Laboratory.f.r Research in Galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong University200240 ShanghaiChina School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong University610031 ChengduSichuanChina college of Physics Sichuan University610065 ChengduSichuanChina Key Laboratory of cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina School of Physics and Tec

A sub-array of the Large high Altitude Air Shower Observatory(LhAASO),Km2A is mainly designed to observe a large fraction of the northern sky to hunt for γ-ray sources at energies above 10 *** though the detector construction is still underway,half of the Km2A array has been operating stably since the end of *** this paper,we present the Km2A data analysis pipeline and the first observation of the crab Nebula,a standard candle in very high energy γ-ray *** detect γ-ray signals from the crab Nebula in both energy ranges of 10-100 TeV and>100 TeV with high significance,by analyzing the Km2A data of 136 live days between December 2019 and may *** the observations,we test the detector performance,including angular resolution,pointing accuracy and cosmic-ray background rejection *** energy spectrum of the crab Nebula in the energy range 10-250 TeV fits well with a single power-law function dN/dE=(1.13±0.05stat±0.08sys)×10^(-14).(E/20 TeV)-309±0.06stat±0.02syscm^(-2) s^(-1) TeV^(-1).It is consistent with previous measurements by other *** opens a new window of γ-ray astronomy above 0.1 PeV through which new ultrahigh-energy γ-ray phenomena,such as cosmic PeVatrons,might be discovered.

关键词： γ-ray crab Nebula extensive air showers cosmic rays

STcf conceptual design report (Volume 1): Physics & detector

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frontiers of physics 2024年第1期19卷 1-154页

作者： m.Achasov X.c.Ai L.P.An R.Aliberti Q.An X.Z.bai y.bai O.bakina A.barnyakov V.blinov V.bobrovnikov D.bodrov A.bogomyagkov A.bondar I.boyko Z.h.b. f.m.cai h.cai j.j.cao Q.h.cao X.cao Z.cao Q.chang K.T.chao D.y.chen h.chen h.X.chen j.f.chen K.chen L.L.chen P.chen S.L.chen S.m.chen S.chen S.P.chen W.chen X.chen X.f.chen X.R.chen y.chen y.Q.chen h.y.cheng j.cheng S.cheng T.G.cheng j.P.Dai L.y.Dai X.c.Dai D.Dedovich A.Denig I.Denisenko j.m.Dias D.Z.Ding L.y.Dong W.h.Dong V.Druzhinin D.S.Du y.j.Du Z.G.Du L.m.Duan D.Epifanov y.L.fan S.S.fang Z.j.fang G.fedotovich c.Q.feng X.feng y.T.feng j.L.fu j.Gao y.N.Gao P.S.Ge c.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong b.Gou W.Gradl j.L.Gu A.Guevara L.c.Gui A.Q.Guo f.K.Guo j.c.Guo j.Guo y.P.Guo Z.h.Guo A.Guskov K.L.han L.han m.han X.Q.hao j.b.he S.Q.he X.G.he y.L.he Z.b.he Z.X.heng b.L.hou T.j.hou y.R.hou c.y.hu h.m.hu K.hu R.j.hu W.h.hu X.h.hu y.c.hu j.hua G.S.huang j.S.huang m.huang Q.y.huang W.Q.huang X.T.huang X.j.huang y.b.huang y.S.huang N.hüsken V.Ivanov Q.P.ji j.j.jia S.jia Z.K.jia h.b.jiang j.jiang S.Z.jiang j.b.jiao Z.jiao h.j.jing X.L.Kang X.S.Kang b.c.Ke m.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin y.Lei E.Levichev c.h.Li c.Li D.y.Li f.Li G.Li G.Li h.b.Li h.Li h.N.Li h.j.Li h.L.Li j.m.Li j.Li L.Li L.Li L.y.Li N.Li P.R.Li R.h.Li S.Li T.Li W.j.Li X.Li X.h.Li X.Q.Li X.h.Li y.Li y.y.Li Z.j.Li h.Liang j.h.Liang y.T.Liang G.R.Liao L.Z.Liao y.Liao c.X.Lin D.X.Lin X.S.Lin b.j.Liu c.W.Liu D.Liu f.Liu G.m.Liu h.b.Liu j.Liu j.j.Liu j.b.Liu K.Liu K.y.Liu K.Liu L.Liu Q.Liu S.b.Liu T.Liu X.Liu y.W.Liu y.Liu y.L.Liu Z.Q.Liu Z.y.Liu Z.W.Liu I.Logashenko y.Long c.G.Lu j.X.Lu N.Lu Q.f.Lü y.Lu y.Lu Z.Lu P.Lukin f.j.Luo T.Luo X.f.Luo y.h.Luo h.j.Lyu X.R.Lyu j.P.ma P.ma y.ma y.m.ma f.maas S.malde D.matvienko Z.X.meng R.mitchell A.Nefediev y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan y.Pan E.Passemar y.P.Pei h.P.Peng L.Peng X.y.Peng X.j.Peng K.Peters S.Pivovarov E.Pyata b.b.Qi y.Q.Qi W.b.Qian y.Qian c.f.Qiao j.j.Qin j.j.Qin L.Q.Qin X.S.Qin T.L.Qiu j.Rademacker c.f.Redmer h.y.Sang Anhui University Hefei 230039China beihang University Beijing 100191China budker Institute of Nuclear Physics Novosibirsk 630090Russia cAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom central china Normal University Wuhan 430079China central South University Changsha 410083China china University of Geosciences Wuhan 430074China china University of mining and Technology Xuzhou 221116China École Polytechnique fédérale de Lausanne(EPfL) LausanneSwitzerland fudan University Shanghai 200433China Goethe University.f.ankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China hangzhou Institute for Advanced Study UCASHangzhou 310024China h.b.i Normal University Shijiazhuang 050024China h.b.i University Baoding 071002China hefei University of Technology Hefei 230601China helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China high Energy Physics center Chung-Ang UniversitySeoul 06974Korea higher School of Economy 11 Pokrovsky bulvar Moscow 109028Russia huangshan University Huangshan 245000China h.b.i University of Automotive Technology Shiyan 442002China hunan Normal University Changsha 410081China hunan University of Science and Technology Xiangtan 411201China hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner mongolia University Hohhot 010021China Institute of Advanced Science facilities Shenzhen 518107China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China jilin University Changch

The superτ-charm facility(STcf)is an electron–positron collider proposed by the chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STcf will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the bEPcII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STcf project in china is under development with an extensive R&D *** document presents the physics opportunities at the STcf,describes conceptual designs of the STcf detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STcf detector conceptual design

A Luminescent cd(Ⅱ) coordination Polymer constructed from Isophthalic Acid and 1,3-bis-(4-pyridyl)propane

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chinese journal of Structural chemistry 2015年第6期34卷 925-930页

作者： xu bo LI Zhi-wang jiang yang LI cun-cheng Key Laboratory of chemical Sensing & Analysis in Universities of Shandong (University of jinan) School of Chemistry and Chemical Engineering University of Jinan

A new coordination complex [cd2（ip）2（bpp）]n （1, h2ip = isophthalic acid, bpp = 1,3-bis-（4-pyridyl） propane） has been synthesized and structurally characterized. crystal data for the title complex are as follows： triclinic system, space group Pi with a = 9.6724（6）, b = 10.2243（6）, c = 14.8205（9） A, a = 88.927（5）, β = 71.664（6）, ）, = 75.767（5）°, f= 1345.79（14） A3, mr = 751.29, Z= 2, f（000） = 740, Dc = 1.854 g/cm^3,μ（moKa） = 1.636 mm^-1, R = 0.0259 and wR = 0.0623 for 4754 observed reflections with I 〉 20（0. X-ray structure analysis reveals that complex 1 holds a 3D architecture based on a-Po primitive c.b.c units with the [cd4（cOO）8] units treated as 6-connected nodes. Solid-state properties for 1, such as infrared spectroscopy, elemental analyses, thermal stability and luminescent property, have also been investigated.

关键词： coordination polymer crystal structure luminescence mixed-ligand approach