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38th International Cosmic Ray Conference, ICRC 2023

作者： Sun, Haoran Zhang, Yongjie Dong, Tiekuang Yu, Yuhong Zhang, Yapeng State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei230026 China Department of Modern Physics University of Science and Technology of China Hefei230026 China Institute of Modern Physics Chinese Academy of Sciences Nanchang Road 509 Lanzhou730000 China Key Laboratory of Dark Matter and Space Astronomy Purple Mountain Observatory Chinese Academy of Sciences Nanjing210023 China

Dark Matter particle Explorer (DAMPE) is a calorimetric-type, satellite-borne detector. One important scientific object of DAMPE is to measure the flux of cosmic ray nuclei, which is fundamental for understanding the cosmic ray origin and propagation mechanism. Heavy nuclei beyond Iron in Cosmic Rays play an important role for studying the outstanding issues in the grand cycle of matter in the Galaxy. Thanks to the good charge resolution of the DAMPE PSD detector (∼0.06e for protons, ∼0.3e for iron), the primary charges in a wide range from proton (Z=1) to Zirconium (Z=40) can be identified. In seven years of data-taking from 2016 to 2022, DAMPE has collected data with more than 3 × 106 nuclei with Z≥26. In order to reduce the contamination of Iron in the flux of heavier nuclei in cosmic rays, new charge identification methods have been studied, and the relativistic rise effect has been corrected. Here, such tools and the methods of charge identification aiming to the spectrum measurement will be introduced. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic rays

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A Possible 250s X-Ray Quasi-periodicity in the Fast Blue Optical Transient AT2018cow

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Research in Astronomy and Astrophysics 2022年第12期22卷 299-310页

作者： Wenjie Zhang Xinwen Shu Jin-Hong Chen Luming Sun Rong-Feng Shen Lian Tao Chun Chen Ning Jiang Liming Dou Ying Qin Xue-Guang Zhang Liang Zhang Jinlu Qu Tinggui Wang Department of Physics Anhui Normal UniversityWuhu 241002China School of Physics and Astronomy Sun Yat-Sen UniversityZhuhai 519082China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaHefei 230026China Department of Astronomy Guangzhou UniversityGuangzhou 510006China School of Physics and Technology Nanjing Normal UniversityNanjing 210023China

The fast blue optical transients(FBOTs)are a new population of extragalactic transients of unclear physical origin.A variety of mechanisms has been proposed including failed supernova explosion,shock interaction with a dense medium,young magnetar,accretion onto a compact object and stellar tidal disruption event,but none is *** we report the discovery of a possible X-ray quasi-periodicity signal with a period of~250 s(at a significance level of 99.76%)in the brightest FBOT AT2018cow through the analysis of XMM-Newton/PN *** signal is independently detected at the same frequency in the average power density spectrum from data taken from the Swift telescope,with observations covering from 6 to 37 days after the optical discovery,though the significance level is lower(94.26%).This suggests that the quasi-periodic oscillation(QPO)frequency may be stable over at least 1.1×10^(4)*** the~250 s QPO to be a scaled-down analog of that typically seen in stellar mass black holes,a black hole mass of~103–10^(5)solar masses could be *** overall X-ray luminosity evolution could be modeled with a stellar tidal disruption by a black hole of~10^(4)solar masses,providing a viable mechanism to produce *** findings suggest that other bright FBOTs may also harbor intermediate-mass black holes.

关键词： black hole physics X-rays:individual(AT2018cow) X-rays:bursts

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Neutron capture cross section of ^(169)Tm measured at the CSNS Back-n facility in the energy region from 30 to 300 keV

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Chinese physics C 2022年第4期46卷 92-104页

作者： Jie Ren Xichao Ruan Wei Jiang Jie Bao Jincheng Wang Qiwei Zhang Guangyuan Luan Hanxiong Huang Yangbo Nie Zhigang Ge Qi An Huaiyong Bai Yu Bao Ping Cao Haolei Chen Qiping Chen Yonghao Chen Yukai Chen Zhen Chen Zengqi Cui Ruirui Fan Changqing Feng Keqing Gao Minhao Gu Changcai Han Zijie Han Guozhu He Yongcheng He Yang Hong Weiling Huang Xiru Huang Xiaolu Ji Xuyang Ji Haoyu Jiang Zhijie Jiang Hantao Jing Ling Kang Mingtao Kang Bo Li Chao Li Jiawen Li Lun Li Qiang Li Xiao Li Yang Li Rong Liu Shubin Liu Xingyan Liu Qili Mu Changjun Ning Binbin Qi Zhizhou Ren Yingpeng Song Zhaohui Song Hong Sun Kang Sun Xiaoyang Sun Zhijia Sun Zhixin Tan Hongqing Tang Jingyu Tang Xinyi Tang Binbin Tian Lijiao Wang Pengcheng Wang Qi Wang Taofeng Wang Zhaohui Wang Jie Wen Zhongwei Wen Qingbiao Wu Xiaoguang Wu Xuan Wu Likun Xie Yiwei Yang Han Yi Li Yu Tao Yu Yongji Yu Guohui Zhang Linhao Zhang Xianpeng Zhang Yuliang Zhang Zhiyong Zhang Yubin Zhao Luping Zhou Zuying Zhou Danyang Zhu Kejun Zhu Peng Zhu Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Northwest Institute of Nuclear Technology Xi'an 710024China University of Chinese Academy of Sciences Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China School of Physics Beihang UniversityBeijing 100083China

The capture cross sections of the ^(169)Tm(n,γ)reaction were measured at the back streaming white neutron beam line(Back-n)of the China Spallation Neutron Source(CSNS)using four C_(6)D_(6) liquid scintillation *** background subtraction,normalization,and correction were carefully considered in the data analysis to obtain accurate cross *** the resonance at 3.9 eV,the R-matrix code SAMMY was used to determine the resonance parameters with the internal normalization *** average capture cross sections of ^(169)Tm for energy between 30 and 300 keV were extracted relative to the ^(197)Au(n,γ)*** measured cross sections of the ^(169)Tm(n,γ)reaction were reported in logarithmically equidistant energy bins with 20 bins per energy decade with a total uncertainty of 5.4%-7.0% in this study and described in terms of average resonance parameters using a Hauser-Feshbach calculation with *** point-wise cross sections and the average resonance parameters showed fair agreement with the evaluated values of the ENDF/B-Ⅷ.0 library in the energy region studied.

关键词： ^(169)Tm(n,γ)^(170)Tm reaction capture cross section PHWT CSNS Back-n white neutron source

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Prototype Design of the Time Measurement Circuit for SiPM-based T0 Detector of CEE 7

Prototype Design of the Time Measurement Circuit for SiPM-ba...

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2022 7th International Conference on Electronic technology and Information Science, ICETIS 2022

作者： Cao, Jie Lu, Jiaming Zhao, Lei Qin, Jiajun Xu, Haoqian Liu, Shubin An, Qi State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Modern Physics University of Science and Technology of China Hefei China

ISBN: (纸本)9783800757794

In Cooling Storage Ring (CSR) External-target Experiment (CEE), the T0 detector, based on plastic scintillator and SiPM, is located in the front portion of the beam target. It is designed to record the beam's arrival time and provide the start time to the other detectors. In this paper, a prototype design of the readout electronics system for the T0 detector is presented. This design aims to reach a high precision time measurement and requires a resolution under 50 ps RMS each channel for the whole system — the combination of T0 detectors and readout electronics system. To achieve high precision time measurement, a circuit divided into two parts is implemented — the pre-amplification and discrimination circuit based on NINO chip and the circuit that realizes Time-to-Digital Converter (TDC) based on FPGA. Meanwhile, the temperature compensation circuit for the SiPMs is implemented to eliminate the temperature drift by altering the operating voltage (Vop) of the SiPM. By conducting a series of tests to evaluate the performance of this prototype circuit, the function has been proven to be successful with a resolution of the readout electronic system better than 15 ps RMS within the dynamic range of detector output signals. A high resolution of voltage adjustment can be made using the temperature compensation circuits. © VDE VERLAG GMBH ∙ Berlin ∙ Offenbach.

关键词： Timing circuits

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GRB 190530A:From Precursor,Prompt Emission to Afterglow all Originated from Synchrotron Radiation

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Research in Astronomy and Astrophysics 2022年第6期22卷 22-32页

作者： Hui-Ya Liu Xiang-Gao Wang Li-Ping Xin Zi-Min Zhou Liang-Jun Chen Bing Li Yuan-Gui Yang Qi Luo Cheng-Kui Li Shao-Lin Xiong Ling-Jun Wang Xu-Hui Han Li-Ming Song Jian-Yan Wei En-Wei Liang Shuang-Nan Zhang Guangxi Key Laboratory for Relativistic Astrophysics Department of PhysicsGuangxi UniversityNanning 530004China GXU-NAOC Center for Astrophysics and Space Sciences Nanning 530004China CAS Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Physics and Electronic Information Huaibei Normal UniversityHuaibei 235000China

GRB 190530A was jointly observed by the High Energy X-ray Telescope of the Hard X-ray Modulation Telescope(Insight-HXMT/HE)and the Ground-Based Wide-Angle Camera network(GWAC-N)with the extremely large field of *** triggered by Insight-HXMT/HE and Fermi/GBM,we observed the optical emission of GRB 190530A,using the 30 cm telescope of GWAC(GWAC-F30)to search and locate its *** observation of the late afterglow of GRB 190530A was made with the 2.16 m telescope at Xinglong *** this paper,we make a detailed exploration of the origin of GRB *** the prompt emission,a“double-tracking”pattern is presented both for the low-energy spectral indexαand the peak energy Epin the Band function with Insight-HXMT/HE and Fermi/GBM data;the results of GRB 190530A are consistent with the Amati and Yonetoku correlations;the spectral lag(τ)versus energy(E)can be estimated withτ=-3.0±0.06+(0.17±0.03)*** synchrotron radiation can account for the origin of GRB190530A prompt emission ***αand Epof the precursor are essentially the same as that of the main prompt emission,implying that they have the same *** the afterglow,it can be described with the external forward shock model in ISM circumburst *** summary,from precursor,prompt emission to afterglow of GRB 190530A all originated from synchrotron radiation.

关键词： (stars)gamma-ray burst:individual(GRB 190530A)-(stars)gamma-ray burst general-virtual observatory tools

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Constraining dark matter models with a light mediator from the CDEX-10 experiment at China Jinping Underground laboratory

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Chinese physics C 2025年第4期49卷 11-15页

作者： Qi-Yuan Nie Wen-Han Dai Hao Ma Qian Yue Ke-Jun Kang Yuan-Jing Li Hai-Peng An C.Greeshma Jian-Ping Chang Yun-Hua Chen Jian-Ping Cheng Zhi Deng Chang-Hao Fang Xin-Ping Geng Hui Gong Tao Guo Xu-Yuan Guo Li He Jin-Rong He Han-Xiong Huang Tu-Chen Huang S.Karmakar Jian-Min Li Jin Li Yu-Lan Li Hau-Bin Li Ming-Chuan Li Han-Yu Li Qian-Yun Li Ren-Ming-Jie Li Xue-Qian Li Yi-Fan Liang Bin Liao Fong-Kay Lin Shin-Ted Lin Jia-Xuan Liu Yan-Dong Liu Yuan-Yuan Liu Shu-Kui Liu Yu Liu Hui Pan Ning-Chun Qi Jie Ren Xi-Chao Ruan Man-Bin Shen Manoj Kumar Singh Wen-Liang Sun Tian-Xi Sun Chang-Jian Tang Yang Tian Hong-Fei Wan Jun-Zheng Wang Yu-Feng Wang Guang-Fu Wang Li Wang Qing Wang Henry-Tsz-King Wong Yu-Cheng Wu Hao-Yang Xing Kai-Zhi Xiong Rui Xu Yin Xu Tao Xue Yu-Lu Yan Li-Tao Yang Nan Yi Chun-Xu Yu Hai-Jun Yu Xiao Yu Ming Zeng Zhi Zeng Zhen-Hua Zhang Zhen-Yu Zhang Peng Zhang Feng-Shou Zhang Lei Zhang Ji-Zhong Zhao Kang-Kang Zhao Ming-Gang Zhao Ji-Fang Zhou Zu-Ying Zhou Jing-Jun Zhu CDEX Collaboration Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100084 Department of Physics Tsinghua UniversityBeijing 100084 Institute of Physics Academia SinicaTaipei 11529 NUCTECH Company Beijing 100084 YaLong River Hydropower Development Company Chengdu 610051 School of Physics and Astronomy Beijing Normal UniversityBeijing 100875 College of Physics Sichuan UniversityChengdu 610065 Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413 Sino-French Institute of Nuclear and Technology Sun Yat-sen UniversityZhuhai 519082 School of Physics Nankai UniversityTianjin 300071 Department of Physics Banaras Hindu UniversityVaranasi 221005 不详

We search for nuclear recoil signals of dark matter(DM)models with a light mediator using data taken from a p-type point-contact germanium detector of the CDEX-10 experiment at the China Jinping Underground *** 90%confidence level upper limits on the DM-nucleon interaction cross section from 205.4 kg-day exposure data are derived,excluding the new parameter space in 2−3 GeV DM mass when the mediator mass is comparable to or lower than the typical momentum *** further interpret our results to constrain a specific self-interacting DM model with a light mediator coupling to the photon through kinetic mixing and set experimental limits on the model parameter region favored by astrophysical observations.

关键词： dark matter direct detection self-interacting dark matter

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An Electronic Design for a Multi-channel Digital Positron Annihilation Spectrometer Based on Multiplexing technology 5

An Electronic Design for a Multi-channel Digital Positron An...

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5th IEEE International Conference on Electronics technology, ICET 2022

作者： Libo, Gu Hao, Liang Jiajin, Ge University of Science and Technology of China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Modern Physics Hefei China

ISBN: (纸本)9781665485081

Positron Annihilation Spectroscopy (PAS), as an important method for studying the microstructure of materials, has the advantages of high sensitivity and no damage to the tested samples. As Silicon Photomultiplier (Si-PM) has the advantages of low price, small size, light weight, low power consumption, high photon detection efficiency, and sensitivity to magnetic fields, it is widely used in PAS. However, some experiments need to collect the position information of photons, which requires a large number of readout channels, will greatly increases the cost. This paper proposes a resistor network design based on multiplexing technology, which simplifies the 8*8 readout channels to 4 channels. © 2022 IEEE.

关键词： Spectrometers

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Ninety percent circular polarization detected in a repeating fast radio burst

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National Science Review 2025年第2期12卷 35-41页

作者： Jinchen Jiang Jiangwei Xu Jiarui Niu Kejia Lee Weiwei Zhu Bing Zhang Yuanhong Qu Heng Xu Dejiang Zhou Shunshun Cao Weiyang Wang Bojun Wang Shuo Cao Yongkun Zhang Chunfeng Zhang Hengqian Gan Jinlin Han Longfei Hao Yuxiang Huang Peng Jiang Dongzi Li Hui Li Ye Li Zhixuan Li Rui Luo Yunpeng Men Lei Qian Jinghai Sun Lin Wang Yonghua Xu Renxin Xu Yuanpei Yang Rui Yao Youling Yue Dongjun Yu Jianping Yuan Yan Zhu National Astronomical Observatories Chinese Academy of Sciences(CAS) Department of Astronomy Peking University Kavli Institute for Astronomy and Astrophysics Peking University Beijing Laser Acceleration Innovation Center Peking University Nevada Center for Astrophysics University of Nevada Department of Physics and Astronomy University of Nevada School of Astronomy and Space Science University of Chinese Academy of Sciences Yunnan Observatories CAS Department of Astrophysical Sciences Princeton University Purple Mountain Observatory CAS School of Physics and Electronic Engineering Guangzhou University Electronic Department Max-Planck institut für Radioastronomie State Key Laboratory of Nuclear Physics and Technology Peking University South-Western Institute For Astronomy Research Yunnan University Xinjiang Astronomical Observatory CAS

Fast radio bursts（FRBs） are extra-galactic sources with unknown physical mechanisms. They emit millisecond-duration radio pulses with isotropic equivalent energy of 1036–1041ergs. This corresponds to a brightness temperature of FRB emission typically reaching the level of 1036K, but can be as high as above1040K for sub-microsecond timescale structures, suggesting the presence of underlying coherent relativistic radiation mechanisms. Polarization carries key information to understand the physical origin of FRBs, with linear polarization usually tracing the geometric configuration of magnetic fields and circular polarization probing both intrinsic radiation mechanisms and propagation effects. Here we show that the repeating source FRB 20201124A emits 90.9% ± 1.1% circularly polarized radio pulses. Such a high degree of circular polarization was unexpected in theory and unprecedented in observation in the case of FRBs, since such a high degree of circular polarization was only common among solar or Jovian radio activities, attributed to the sub-relativistic electrons. We note that there is no obvious correlation between the degree of circular polarization and burst fluence. Besides the high degree of circular polarization, we also detected a rapid swing and orthogonal jump in the position angle of linear polarization. The detection of high-degree circular polarization in FRB 20201124A, together with its linear polarization properties that show orthogonal modes, place strong constraints on FRB physical mechanisms, calling for an interplay between magnetospheric radiation and propagation effects in shaping the observed FRB radiation.

关键词： radio astronomy fast radio burst polarization

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Prospects for the detection rate of very-high-energyγ-ray emissions from shortγ-ray bursts with the HADAR experiment

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Chinese physics C 2023年第9期47卷 120-129页

作者：陈琪凌胡珮瑾苏菁菁康明铭郭义庆陈天禄单增罗布范雨凡冯有亮高启苟全补胡红波厉海金刘成刘茂元刘伟钱详利乔冰强孙慧英王旭王振辛广广姚玉华袁强张毅赵兵 College of Physics Sichuan UniversityChengdu 610064China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences 19 A Yuquan RdShijingshan DistrictBeijing 100049China The Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China School of Intelligent Engineering Shandong Management UniversityJinan 250357China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of Physics and Technology Wuhan UniversityWuhan 430072China College of Physics Chongqing UniversityChongqing 401331China Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210008China

The observation of short gamma ray bursts(SGRBs)in the TeV energy range plays an important role in understanding the radiation mechanism and probing potential new physics,such as Lorentz invariance violation(LIV).However,no SGRBs have been observed in this energy range owing to the short duration of SGRBs and the weakness of current *** experiments with new technology are required to detect the very high energy(VHE)emission of *** this study,we simulate the VHE γ-ray emissions from SGRBs and calculate the annu-al detection rate with the High Altitude Detection of Astronomical Radiation(HADAR)***,a set of pseudo-SGRB samples is generated and checked using the observations of the Fermi-GBM,Fermi-LAT,and Swift-BAT *** annual detection rate is calculated from these SGRB samples based on the performance of the HADAR *** a result,the HADAR experiment can detect 0.5 SGRBs per year if the spectral break-off of γ-rays caused by the internal absorption and Klein-Nishina(KN)effect is larger than 100 *** a GRB090510-like GRB in HADAR's view,it should be possible to detect approximately 2000 photons considering the internal absorption and KN *** a time delay assumption due to LIV effects,a simulated light curve of GRB090510 has evident energy *** hope that the HADAR experiment can perform SGRB observa-tions and test our calculations in the future.

关键词： HADAR simulation gamma ray burst cosmic ray

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HOM damping requirements and measurements for CEPC 650-MHz 2-cell cavity

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Radiation Detection technology and Methods 2020年第1期4卷 17-24页

作者： Hongjuan Zheng Jiyuan Zhai Fanbo Meng Peng Sha Jie Gao Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsCASBeijing 100049China

Introduction The circular electron-positron collider(CEPC)will use a 650-MHz RF system with 240 two-cell cavities for the *** collider is a double ring with shared cavities for Higgs operation and separate cavities for W and Z *** higher-order modes(HOM)excited by the intense beam bunches must be damped to avoid additional cryogenic loss and multi-bunch *** and methods To get the real damping results,two prototypes of HOM coupler have been fabricated and installed on the 650-MHz two-cell *** HOMs have been verified by bead pulling method.A test bench with two 2-cell cavities is used to measure the real damping results and study HOM propagating properties for a cavity *** In this paper,the impedance budget,HOM damping and HOM power requirements for the CEPC collider ring are *** damping results measured for the fundamental mode and HOMs seem good compared with the simulated *** absorbing efficiency of the absorber and the extraction power efficiency of HOM couplers were also achieved.

关键词： HOM damping HOM power Coupled-bunch instabilities HOM measurement HOM propagating properties

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