Jian Wu

Purple Mountain Observatory

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Qiang Yuan

Chinese Academy of Sciences

Chuan Yue

Liaoning Normal University

A. Tykhonov

University of Geneva

Lei Feng

University of Science and Technology of China

Jin Chang

Institute of High Energy Physics

Margherita Di Santo

Gran Sasso Science Institute

Rui Qiao

Chinese Academy of Sciences

I. De Mitri

Istituto Nazionale di Fisica Nucleare

A. Surdo

Istituto Nazionale di Fisica Nucleare, Sezione di Lecce

Wei Jiang

Chinese Academy of Sciences

Cooperative Institutions

Chinese Academy of Sciences

224

University of Science and Technology of China

190

Purple Mountain Observatory

156

University of Chinese Academy of Sciences

University of Geneva

Gran Sasso Science Institute

Istituto Nazionale di Fisica Nucleare

Institute of High Energy Physics

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso

University of Sassari

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Latest results on searching for fractionally charged particles with the DAMPE experiment

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) (2023)

Chengming Liu Francesca Alemanno Corrado Altomare Qi An P. Azzarello

The existence of fractionally charged particles (FCP) is foreseen in extensions of or beyond the Standard Model of particle physics. Most of the previously conducted searches for FCPs in cosmic rays were based on experiments underground or at high altitudes. However, there have been few searches for FCPs in cosmic rays carried out in orbit other than AMS-01 flown by a space shuttle and BESS by a balloon at the top of the atmosphere. In this study, we conduct an FCP search in space based on on-orbit data obtained using the Dark Matter Particle Explorer (DAMPE) satellite over a period of five years. Unlike underground experiments, which require an FCP energy of the order of hundreds of GeV, our FCP search starts at only a few GeV. An upper limit of $6.2\times 10^{-10}~~\mathrm{cm^{-2}sr^{-1} s^{-1}}$ is obtained for the flux. Our results demonstrate that DAMPE exhibits higher sensitivity than experiments of similar types by three orders of magnitude that more stringently restricts the conditions for the existence of FCP in primary cosmic rays.

Orbit (dynamics)

Particle (ecology)

International Space Station

10.22323/1.444.0149

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Citations (1)

The spatial distribution of dark matter annihilation originating from a gamma-ray line signal

Research in Astronomy and Astrophysics (2014)

Tongsuo Lu Tiekuang Dong Jian Wu

The GeV–TeV γ-ray line signal is the smoking gun signature of dark matter annihilation or decay. The detection of such a signal is one of the main targets of some space-based telescopes, including Fermi-LAT and the upcoming missions CALET, DAMPE and Gamma-400. An important feature of γ-ray line photons that originate from dark-matter-annihilation is that they are concentrated at the center of the Galaxy. So far, no reliable γ-ray line has been detected by Fermi-LAT, and the upper limits on the cross section of annihilation into γ-rays have been reported. We use these upper limits to estimate the "maximal" number of γ-ray line photons detectable for Fermi-LAT, DAMPE and Gamma-400, and then investigate the spatial distribution of these photons. We show that the center of the distribution will usually be offset from the Galactic center (Sgr A*) due to the limited statistics. Such a result is almost independent of models of the dark matter distribution, and will render the reconstruction of the dark matter distribution with the γ-ray line signal very challenging for foreseeable space-based detectors.

Annihilation

Line (geometry)

10.1088/1674-4527/14/5/002

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Citations (4)

Calibration and Status of the 3D Imaging Calorimeter of DAMPE for Cosmic Ray Physics on Orbit

arXiv (Cornell University) (2019)

Libo Wu Sicheng Wen Chengming Liu Haoting Dai Yifeng Wei

The DArk Matter Particle Explorer (DAMPE) developed in China was designed to search for evidence of dark matter particles by observing primary cosmic rays and gamma rays in the energy range from 5 GeV to 10 TeV. Since its launch in December 2015, a large quantity of data has been recorded. With the data set acquired during more than a year of operation in space, a precise time-dependent calibration for the energy measured by the BGO ECAL has been developed. In this report, the instrumentation and development of the BGO Electromagnetic Calorimeter (BGO ECAL) are briefly described. The calibration on orbit, including that of the pedestal, attenuation length, minimum ionizing particle peak, and dynode ratio, is discussed, and additional details about the calibration methods and performance in space are presented.

Calorimeter (particle physics)

Orbit (dynamics)

Dynode

10.48550/arxiv.1901.00734

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Charge measurement of cosmic ray nuclei with the plastic scintillator detector of DAMPE

Astroparticle Physics (2018)

Tiekuang Dong Yapeng Zhang Peng-Xiong Ma Yongjie Zhang P. Bernardini

10.1016/j.astropartphys.2018.10.001

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Citations (41)

Simulation Research on the Solar Hard X-Ray Imaging Telescope

Chinese Astronomy and Astrophysics (2012)

Teng Teng Jian Wu Jin Chang

X-ray telescope

Collimator

Solar telescope

Executable

10.1016/j.chinastron.2012.04.001

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Citations (1)

Study of Track Reconstruction for DAMPE

Chinese Astronomy and Astrophysics (2017)

Tongsuo Lu Shijun Lei Jing-Jing Zang J. Chang Jian Wu

Calorimeter (particle physics)

10.1016/j.chinastron.2017.08.012

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Measurements of the boron-to-carbon and boron-to-oxygen flux ratios in cosmic rays with DAMPE

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) (2023)

Chuan Yue Zhan Fang Chen Dimitrios Kyratzis A. Parenti Yi Feng Wei

Boron nuclei in cosmic rays (CRs) are believed to be mainly produced by the fragmentation of heavier nuclei, such as carbon and oxygen, via collisions with the interstellar matter. Therefore, the boron-to-carbon flux ratio (B/C) and the boron-to-oxygen flux ratio (B/O) are very essential probes of the CR propagation. With a large geometric factor and a good charge resolution, the DArk Matter Particle Explorer (DAMPE), is expected to extend the measurement of B/C and B/O up to a few TeV/n energies. In this contribution, the direct measurements of B/C and B/O in the energy range from 10 GeV/n to 5.6 TeV/n with six years of data collected by DAMPE are presented.

Carbon fibers

Isotopes of boron

Fragmentation

10.22323/1.444.0159

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Citations (2)

Simulation study on the operation of a multi-gap resistive plate chamber

Measurement Science and Technology (2005)

Ming Shao Zhao Yan-E Li Cheng Hongfang Chen Xiaolian Wang

The main features of a multi-gap resistive plate chamber (MRPC) are studied by Monte Carlo simulation with the gas avalanche model developed by Legler and Riegler et al (1961 Z. Naturforsch. 16a 253). A simple model of signal readout including FEE and noise effect is introduced in the simulation. The results of detection efficiency and time resolution are compared with those from experiments, under different working conditions. Good agreements are achieved.

Resistive touchscreen

SIGNAL (programming language)

10.1088/0957-0233/17/1/020

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Citations (12)

A method for aligning the plastic scintillator detector on DAMPE

Research in Astronomy and Astrophysics (2019)

Peng-Xiong Ma Yongjie Zhang Yapeng Zhang Yao Li Jing-Jing Zang

Abstract The Plastic Scintillator Detector (PSD) onboard the DArk Matter Particle Explorer (DAMPE) is designed to measure cosmic ray charge (Z) and to act as a veto detector for gamma ray identification. To fully exploit the charge identification potential of PSD and to enhance its capability to identify gamma ray events, we develop an alignment method for the PSD. The path length of a given track in the volume of a PSD bar is derived taking into account the shift and rotation alignment corrections. By examining energy spectra of corner-passing events and fully contained events, position shifts and rotations of all PSD bars are obtained, and are found to be on average about 1mm and 0.0015 radian respectively. To validate the alignment method, we introduce artificial shifts and rotations of PSD bars into the detector simulation. These shift and rotation parameters can be recovered successfully by the alignment procedure. As a result of the PSD alignment procedure, the charge resolution of the PSD is improved from 4% to 8%, depending on the nuclei.

Bar (unit)

Particle identification

Position (finance)

10.1088/1674-4527/19/6/82

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Citations (10)

Offline software for the DAMPE experiment

Chinese Physics C (2017)

Chi Wang Dong Liu Yifeng Wei Zhiyong Zhang Yunlong Zhang

A software system has been developed for the DArk Matter Particle Explorer (DAMPE) mission, a satellite-based experiment. The DAMPE software is mainly written in C++ and steered using Python script. This article presents an overview of the DAMPE offline software, including the major architecture design and specific implementation for simulation, calibration and reconstruction. The whole system has been successfully applied to DAMPE data analysis, based on which some results from simulation and beam test experiments are obtained and presented.

Python

10.1088/1674-1137/41/10/106201

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Citations (6)