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1. Comparison of proton shower developments in the BGO calorimeter of the Dark Matter Particle Explorer between GEANT4 and FLUKA simulations

Author

Peng-Xiong Ma, Yongjie Zhang, Yu-Hong Yu, Ya-Peng Zhang, Mingyang Cui, M. N. Mazziotta, Jing-Jing Zang, Dimitrios Kyratzis, Andrii Tykhonov, Giovanni Marsella, D. Droz, P. Fusco, Giovanni Catanzani, Qiang Yuan, A. Surdo, Yi-Yeng Wei, Yang Liu, F. Loparco, Shi-Jun Lei, Ivan De Mitri, Zhan-Fang Chen, Xiang Li, Paolo Bernardini, Tie-Kuang Dong, Wei Jiang, F. Gargano, Xu Pan, Yunlong Zhang, Wenxi Peng, Dongya Guo, Chuan Yue, Giacinto Donvito, Francesca Alemanno, Jiang W., Yue C., Cui M.-Y., Li X., Yuan Q., Alemanno F., Bernardini P., Catanzani G., Chen Z.-F., Mitri I.D., Dong T.-K., Donvito G., Droz D.F., Fusco P., Gargano F., Guo D.-Y., Kyratzis D., Lei S.-J., Liu Y., Loparco F., Ma P.-X., Marsella G., Mazziotta M.N., Pan X., Peng W.-X., Surdo A., Tykhonov A., Wei Y.-Y., Yu Y.-H., Zang J.-J., Zhang Y.-P., Zhang Y.-J., Zhang Y.-L., Jiang, W., Yue, C., Cui, M. -Y., Li, X., Yuan, Q., Alemanno, F., Bernardini, P., Catanzani, G., Chen, Z. -F., Mitri, I. D., Dong, T. -K., Donvito, G., Droz, D. F., Fusco, P., Gargano, F., Guo, D. -Y., Kyratzis, D., Lei, S. -J., Liu, Y., Loparco, F., Ma, P. -X., Marsella, G., Mazziotta, M. N., Pan, X., Peng, W. -X., Surdo, A., Tykhonov, A., Wei, Y. -Y., Yu, Y. -H., Zang, J. -J., Zhang, Y. -P., Zhang, Y. -J., and Zhang, Y. -L.

Subjects
Physics - Instrumentation and Detectors, Proton, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Dark matter, S, General Physics and Astronomy, FOS: Physical sciences, Cosmic ray, Nuclear physics, Spectral analysis, Instrumentation and Methods for Astrophysics (astro-ph.IM), Monte Carlo simulation, Physics, Tp, Calorimeter (particle physics), Detector, Instrumentation and Detectors (physics.ins-det), Cosmic Rays, n, t, Particle, High Energy Physics::Experiment, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The DArk Matter Particle Explorer (DAMPE) is a satellite-borne detector for high-energy cosmic rays and $\gamma$-rays. To fully understand the detector performance and obtain reliable physical results, extensive simulations of the detector are necessary. The simulations are particularly important for the data analysis of cosmic ray nuclei, which relies closely on the hadronic and nuclear interactions of particles in the detector material. Widely adopted simulation softwares include the GEANT4 and FLUKA, both of which have been implemented for the DAMPE simulation tool. Here we describe the simulation tool of DAMPE and compare the results of proton shower properties in the calorimeter from the two simulation softwares. Such a comparison gives an estimate of the most significant uncertainties of our proton spectral analysis., Comment: 7 pages, 7 figures, to be published in Chinese Physics Letters

Published
2020

2. Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite

Author

Chi Wang, Y. Z. Gong, Yujuan Liu, Kai-Kai Duan, Yaohui Zhang, L. G. Wang, Dong Ya Guo, Cihang Luo, X. Y. Peng, Jie Liu, Guangshun Huang, Zhi-Yu Sun, S. Wang, R. R. Fan, Maria Ionica, Jie Kong, Peng-Xiong Ma, Zhi Hui Xu, Xiaoyuan Huang, Yu-Sa Wang, N. H. Liao, L. Feng, Michael Ma, H. Liu, X. Y. Ma, Z. X. Dong, Dingsong Wu, Jun-jun Guo, Niu Xiaoyang, A. D'Amone, K. Gong, S. C. Wen, I. De Mitri, P. Azzarello, Min Gao, Chengrui Zhou, Shengxia Zhang, Shumei Wu, Mn Mazziotta, G. Z. Shang, K. Xi, Xian-Min Jin, F. Loparco, Xin-Fu Zhao, Z. Z. Xu, Y. Y. Huang, Shuang Xue Han, X. L. Wang, Zhongjie Yang, Y. H. Yu, G. Marsella, Zhao-Min Wang, Jinglai Duan, Andrii Tykhonov, S. B. Liu, Y. Zhang, Meng Su, Q. An, Y. F. Dong, C. Q. Feng, Xiulian Pan, Ju-Xian Song, Peidong Yang, W. Li, Y. M. Hu, S.X. Li, S. Y. Ma, H. T. Xu, Jindong Zhang, Z. Q. Xia, Yali Zhou, Jialong Chen, J. Z. Wang, X. X. Li, H. Su, M. S. Cai, Jian Wu, X. J. Bi, Haiqiong Wang, Yifan Yang, Tianxiao Ma, F. J. Gan, Donghong Chen, J. J. Zang, Hao Ting Dai, Huaguang Wang, Zhoubin Zhang, P. Bernardini, Z.-Q. Shen, F. Gargano, H. S. Chen, Manyu Ding, Y. F. Liang, R. Qiao, D. Droz, Chuan Yue, W. X. Peng, Y. F. Wei, Shi-Jun Lei, Q. Yuan, Y. J. Zhang, P. Fusco, Yun-Zhi Zhang, A. Surdo, YM Liang, Jiang Chang, J. J. Wei, Lihui Wu, D. Mo, Y. Li, Giacinto Donvito, A. De Benedittis, Wangli Chen, Yang Haibo, Quan Wang, R. Asfandiyarov, M. Di Santo, J. Y. Zhang, Xi Zhu, J. N. Rao, D. M. Wei, Zongye Zhang, Hong Yun Zhao, Yu-Xuan Zhu, D. D'Urso, Hu-Rong Yao, S. Vitillo, Yen-Po Wang, Yugang Zhang, M. Y. Cui, M. M. Salinas, Fang Fang, Wei Liu, T. S. Cui, Huan Zhao, Z. Xu, X. J. Teng, Tie-Kuang Dong, W. H. Shen, Z. T. Shen, Shanta M. Zimmer, Xian Qiang Li, Xin Wu, C. Liu, Y. F. Wang, V. Gallo, W. Zhang, Wei Jiang, Yuqing Fan, Fengtao Zhang, G. F. Xue, Pengchao Zhang, Xiangpeng Guo, Xixian Wang, An Q., Asfandiyarov R., Azzarello P., Bernardini P., Bi X. J., Cai M. S., Chang J., Chen D. Y., Chen H. F., Chen J. L., Chen W., Cui M. Y., Cui T. S., Dai H. T., D'Amone A., De Benedittis A., De Mitri I., Di Santo M., Ding M., Dong T. K., Dong Y. F., Dong Z. X., Donvito G., Droz D., Duan J. L., Duan K. K., D'Urso D., Fan R. R., Fan Y. Z., Fang F., Feng C. Q., Feng L., Fusco P., Gallo V., Gan F. J., Gao M., Gargano F., Gong K., Gong Y. Z., Guo D. Y., Guo J. H., Guo X. L., Han S. X., Hu Y. M., Huang G. S., Huang X. Y., Huang Y. Y., Ionica M., Jiang W., Jin X., Kong J., Lei S. J., Li S., Li W. L., Li X., Li X. Q., Li Y., Liang Y. F., Liang Y. M., Liao N. H., Liu C. M., Liu H., Liu J., Liu S. B., Liu W. Q., Liu Y., Loparco F., Luo C. N., Ma M., Ma P. X., Ma S. Y., Ma T., Ma X. Y., Marsella G., Mazziotta M. N., Mo D., Niu X. Y., Pan X., Peng W. X., Peng X. Y., Qiao R., Rao J. N., Salinas M. M., Shang G. Z., Shen W. H., Shen Z. Q., Shen Z. T., Song J. X., Su H., Su M., Sun Z. Y., Surdo A., Teng X. J., Tykhonov A., Vitillo S., Wang C., Wang H., Wang H. Y., Wang J. Z., Wang L. G., Wang Q., Wang S., Wang X. H., Wang X. L., Wang Y. F., Wang Y. P., Wang Y. Z., Wang Z. M., Wei D. M., Wei J. J., Wei Y. F., Wen S. C., Wu D., Wu J., Wu L. B., Wu S. S., Wu X., Xi K., Xia Z. Q., Xu H. T., Xu Z. H., Xu Z. L., Xu Z. Z., Xue G. F., Yang H. B., Yang P., Yang Y. Q., Yang Z. L., Yao H. J., Yu Y. H., Yuan Q., Yue C., Zang J. J., Zhang F., Zhang J. Y., Zhang J. Z., Zhang P. F., Zhang S. X., Zhang W. Z., Zhang Y., Zhang Y. J., Zhang Y. L., Zhang Y. P., Zhang Y. Q., Zhang Z., Zhang Z. Y., Zhao H., Zhao H. Y., Zhao X. F., Zhou C. Y., Zhou Y., Zhu X., Zhu Y., Zimmer S., An, Q., Asfandiyarov, R., Azzarello, P., Bernardini, P., Bi, X. J., Cai, M. S., Chang, J., Chen, D. Y., Chen, H. F., Chen, J. L., Chen, W., Cui, M. Y., Cui, T. S., Dai, H. T., D'Amone, A., De Benedittis, A., De Mitri, I., Di Santo, M., Ding, M., Dong, T. K., Dong, Y. F., Dong, Z. X., Donvito, G., Droz, D., Duan, J. L., Duan, K. K., D'Urso, D., Fan, R. R., Fan, Y. Z., Fang, F., Feng, C. Q., Feng, L., Fusco, P., Gallo, V., Gan, F. J., Gao, M., Gargano, F., Gong, K., Gong, Y. Z., Guo, D. Y., Guo, J. H., Guo, X. L., Han, S. X., Hu, Y. M., Huang, G. S., Huang, X. Y., Huang, Y. Y., Ionica, M., Jiang, W., Jin, X., Kong, J., Lei, S. J., Li, S., Li, W. L., Li, X., Li, X. Q., Li, Y., Liang, Y. F., Liang, Y. M., Liao, N. H., Liu, C. M., Liu, H., Liu, J., Liu, S. B., Liu, W. Q., Liu, Y., Loparco, F., Luo, C. N., Ma, M., Ma, P. X., Ma, S. Y., Ma, T., Ma, X. Y., Marsella, G., Mazziotta, M. N., Mo, D., Niu, X. Y., Pan, X., Peng, W. X., Peng, X. Y., Qiao, R., Rao, J. N., Salinas, M. M., Shang, G. Z., Shen, W. H., Shen, Z. Q., Shen, Z. T., Song, J. X., Su, H., Su, M., Sun, Z. Y., Surdo, A., Teng, X. J., Tykhonov, A., Vitillo, S., Wang, C., Wang, H., Wang, H. Y., Wang, J. Z., Wang, L. G., Wang, Q., Wang, S., Wang, X. H., Wang, X. L., Wang, Y. F., Wang, Y. P., Wang, Y. Z., Wang, Z. M., Wei, D. M., Wei, J. J., Wei, Y. F., Wen, S. C., Wu, D., Wu, J., Wu, L. B., Wu, S. S., Wu, X., Xi, K., Xia, Z. Q., Xu, H. T., Xu, Z. H., Xu, Z. L., Xu, Z. Z., Xue, G. F., Yang, H. B., Yang, P., Yang, Y. Q., Yang, Z. L., Yao, H. J., Yu, Y. H., Yuan, Q., Yue, C., Zang, J. J., Zhang, F., Zhang, J. Y., Zhang, J. Z., Zhang, P. F., Zhang, S. X., Zhang, W. Z., Zhang, Y., Zhang, Y. J., Zhang, Y. L., Zhang, Y. P., Zhang, Y. Q., Zhang, Z., Zhang, Z. Y., Zhao, H., Zhao, H. Y., Zhao, X. F., Zhou, C. Y., Zhou, Y., Zhu, X., Zhu, Y., and Zimmer, S.

Subjects
dark matter, cosmic rays, space, Proton, Milky Way, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, FOS: Physical sciences, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Kinetic energy, 01 natural sciences, 0103 physical sciences, 010306 general physics, Nuclear Experiment, Research Articles, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Spectral index, Multidisciplinary, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Settore FIS/01 - Fisica Sperimentale, SciAdv r-articles, Physics::Accelerator Physics, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, Research Article
Abstract

DAMPE satellite has directly measured the cosmic ray proton spectrum from 40 GeV to 100 TeV and revealed a new feature at about 13.6 TeV., The precise measurement of the spectrum of protons, the most abundant component of the cosmic radiation, is necessary to understand the source and acceleration of cosmic rays in the Milky Way. This work reports the measurement of the cosmic ray proton fluxes with kinetic energies from 40 GeV to 100 TeV, with 2 1/2 years of data recorded by the DArk Matter Particle Explorer (DAMPE). This is the first time that an experiment directly measures the cosmic ray protons up to ~100 TeV with high statistics. The measured spectrum confirms the spectral hardening at ~300 GeV found by previous experiments and reveals a softening at ~13.6 TeV, with the spectral index changing from ~2.60 to ~2.85. Our result suggests the existence of a new spectral feature of cosmic rays at energies lower than the so-called knee and sheds new light on the origin of Galactic cosmic rays.

Published
2019

3. A charge reconstruction algorithm for DAMPE silicon microstrip detectors

Author

P. Azzarello, S. Garrappa, Yaqing Liu, M. Pohl, A. Nardinocchi, Yi-Fan Dong, F. Gargano, Wenxi Peng, Maria Ionica, Min Gao, G. Marsella, M. Domenjoz, F. Loparco, Andrii Tykhonov, Ruirui Fan, Jiawei Yang, Di Wu, P. Fusco, Hao Zhao, Marc Weber, Xingzhu Cui, C. Husi, J. Z. Wang, Huanyu Wang, Guang-Qi Dai, M. Duranti, V. Gallo, Mn Mazziotta, D. La Marra, R. Asfandiyarov, G. Ambrosi, Franck Cadoux, S. Vitillo, V. Postolache, Paolo Bernardini, G. Pelleriti, Dongya Guo, Rui Qiao, M. Caprai, Fei Zhang, Xin Wu, A. Bolognini, Xiaohua Liang, Ke Gong, Bruna Bertucci, L. Nicola, I. De Mitri, A. Surdo, Qiao, R., Peng, W. -X., Ambrosi, G., Asfandiyarov, R., Azzarello, P., Bernardini, P., Bertucci, B., Bolognini, A., Cadoux, F., Caprai, M., Cui, X. -Z., Dai, G. -Q., Domenjoz, M., Dong, Y. -F., Duranti, M., Fan, R. -R., Fusco, P., Gallo, V., Gao, M., Gargano, F., Garrappa, S., Gong, K., Guo, D. -Y., Husi, C., Ionica, M., Liang, X. -H., Liu, Y. -Q., Loparco, F., La Marra, D., Marsella, G., Mazziotta, M. N., De Mitri, I., Nardinocchi, A., Nicola, L., Pelleriti, G., Pohl, M., Postolache, V., Surdo, A., Tykhonov, A., Vitillo, S., Wang, H. -Y., Wang, J. -Z., Weber, M., Wu, D., Wu, X., Yang, J. -W., Zhang, F., Zhao, H., Qiao R., Peng W. -X., Ambrosi G., Asfandiyarov R., Azzarello P., Bernardini P., Bertucci B., Bolognini A., Cadoux F., Caprai M., Cui X. -Z., Dai G. -Q., Domenjoz M., Dong Y. -F., Duranti M., Fan R. -R., Fusco P., Gallo V., Gao M., Gargano F., Garrappa S., Gong K., Guo D. -Y., Husi C., Ionica M., Liang X. -H., Liu Y. -Q., Loparco F., La Marra D., Marsella G., Mazziotta M. N., De Mitri I., Nardinocchi A., Nicola L., Pelleriti G., Pohl M., Postolache V., Surdo A., Tykhonov A., Vitillo S., Wang H. -Y., Wang J. -Z., Weber M., Wu D., Wu X., Yang J. -W., Zhang F., and Zhao H.

Subjects
Physics, Nuclear and High Energy Physics, Photon, Large Hadron Collider, Ion beam, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Charge reconstruction, STK, Settore FIS/01 - Fisica Sperimentale, Reconstruction algorithm, Electron, 01 natural sciences, Charged particle, Charge sharing, Ion, Nuclear physics, Silicon microstrip detector, 0103 physical sciences, DAMPE, High Energy Physics::Experiment, 010303 astronomy & astrophysics, Instrumentation
Abstract

The DArk Matter Particle Explorer (DAMPE) can detect electrons and photons from 5 GeV to 10 TeV and charged nuclei from a few tens of GeV to 100 TeV. The silicon–tungstentracker (STK), which is composed of 768 singled-sided silicon microstrip detectors, is one of four subdetectors in DAMPE providing photon conversion , track reconstruction, and charge identification for relativistic charged particles. This paper focuses on the charge identification performance of the STK detector. The charge response depends mainly on the incident angle and the impact position of the incoming particle. To improve the charge resolution, a reconstruction algorithm to correct for these parameters was tested during a test beam campaign conducted with a high-intensity ion beam at CERN. This algorithm was successfully applied to the ion test beam and the ion charge of Z=4 ∼ 10 and was successfully reconstructed for both normal and 9°incident beams.

Published
2019

4. The on-orbit calibration of DArk Matter Particle Explorer

Author

Chang Qing Feng, A. D'Amone, X.Q. Ma, K. Gong, D. Mo, R. Asfandiyarov, G. Ambrosi, Y. M. Hu, Peng-Xiong Ma, Xun Feng Zhao, Zhi Hui Xu, Jinglai Duan, Tianxiao Ma, G. Z. Shang, H. T. Xu, C. Liu, X. Y. Ma, M. Y. Cui, S. C. Wen, Chenchen Wang, J. J. Zang, Deng Yi Chen, Xixian Wang, M. M. Salinas, Niu Xiaoyang, Yaping Wang, Shanta M. Zimmer, J. N. Rao, Haiqiong Wang, Da Ming Wei, Z. Y. Sun, Hao Ting Dai, V. Gallo, Q. An, Peidong Yang, Honglong Wang, D. D’Urso, Yuan Zhu Wang, Xiulian Pan, W. Zhang, I. De Mitri, H. Liu, Yang Haibo, Wei Liang Li, D.L. Zhang, H. S. Chen, Min Gao, Li Bo Wu, A. De Benedittis, Wangli Chen, Xi Zhu, Shuyao Li, X.B. Tian, Paolo Bernardini, J.N. Dong, Sha Wu, Y. Q. Zhang, Hu-Rong Yao, Kai-Kai Duan, Y. F. Wei, Jin Chang, Jiangtao Guo, F. J. Gan, S. Y. Ma, Wei Jiang, Z. Q. Xia, Yifan Yang, L. G. Wang, P. Azzarello, Y. J. Zhang, F. Gargano, Zhenyu Zhang, Maria Ionica, Jie Kong, Y. F. Liang, Yali Zhou, Jing Xing Song, M. Di Santo, Xin Wu, Y. F. Wang, R. R. Fan, R. Qiao, M. Caragiulo, Yuqing Fan, N. H. Liao, Jindan Zhang, Qian Wang, Y.L. Xin, Jie Liu, Zhoubin Zhang, Y. H. Yu, Zhao-Qiang Shen, T. S. Cui, Zhao-Min Wang, Yun Long Zhang, Yao Ming Liang, G. F. Xue, Shengxia Zhang, Zhongjie Yang, J. J. Wei, Z. Xu, Dan Jiang, F. Loparco, Laiyu Zhang, S. Vitillo, X. L. Wang, Wei Liu, Y. Zhang, Yongxiang Liu, J.B. Zhang, J. L. Chen, Qing Yuan, Meng Su, Z.Z. Xu, G. Marsella, Andrii Tykhonov, S. Wang, X. J. Teng, Tie-Kuang Dong, M. M. Ma, Zhang Yalan, Shi-Jun Lei, D. Droz, Fengtao Zhang, Huan Zhao, S. B. Liu, M. N. Mazziotta, H. Su, A. Surdo, Jin Zhou Wang, S. Garrappa, W. H. Shen, Yinlian Zhu, Z. T. Shen, Pengchao Zhang, Guang Shun Huang, Fang Fang, X. X. Li, Hong Yun Zhao, M. S. Cai, W. X. Peng, Y. Li, Y. Z. Gong, Z. X. Dong, Chang Yi Zhou, X. Y. Peng, Lingyan Feng, K. Xi, Jindong Zhang, Di Wu, Jian Wu, Chuan Yue, Y. Y. Huang, P. Fusco, Y. F. Dong, Shan-Shan Gao, Manyu Ding, Xian-Min Jin, Ambrosi, G., An, Q., Asfandiyarov, R., Azzarello, P., Bernardini, P., Cai, M. S., Caragiulo, M., Chang, J., Chen, D. Y., Chen, H. F., Chen, J. L., Chen, W., Cui, M. Y., Cui, T. S., Dai, H. T., D'Amone, A., Benedittis, De, Mitri, De, I., Ding, Di Santo, M., Dong, J. N., Dong, T. K., Dong, Y. F., Dong, Z. X., Droz, D., Duan, K. K., Duan, J. L., D'Urso, D., Fan, R. R., Fan, Y. Z., Iemail, Author, Fang, F., Feng, C. Q., Feng, L., Fusco, P., Gallo, V., Gan, F., Gao, M., Gao, S. S., Gargano, F., Garrappa, S., Gong, K., Gong, Y. Z., Guo, J. H., Email Author, Hu, Y. M., Huang, G. S., Huang, Y. Y., Ionica, M., Jiang, D., Jiang, W., Jin, X., Kong, J., Lei, S. J., Li, S., Li, X., Li, W. L., Li, Y., Liang, Y. F., Liang, Y. M., Liao, N. H., Liu, C. M., Liu, H., Liu, J., Liu, S. B., Liu, W. Q., Liu, Y., Loparco, F., Ma, M., Ma, P. X., Ma, S. Y., Ma, T., Ma, X. Q., Ma, X. Y., Marsella, G., Mazziotta, M. N., Mo, D., Niu, X. Y., Pan, X, Peng, X. Y., Peng, W. X., Qiao, R., Rao, J. N., Salinas, M. M., Shang, G. Z., Shen, W. H., Shen, Z. Q., Shen, Z. T., Song, J. X., Su, H., Su, M., Sun, Z. Y., Surdo, A., Teng, X. J., Tian, X. B., Tykhonov, A., Vitillo, S., Wang, C., Wang, H., Wang, H. Y., Wang, J. Z., Wang, L. G., Wang, Q., Wang, S., Wang, X. H., Wang, X. L., Wang, Y. F., Wang, Y. P., Wang, Y. Z., Wang, Z. M., Wen, S. C., Wei, D. M., Wei J. J., A, Wei Y. F., C, Wu D., J, Wu J., A, H, Wu, L. B., c Wu, S. S., k Wu, X., d Xi, K., j Xia, Z. Q., a h, Xin Y. L., A, Xu H. T., K, Xu Z. H., A, H, Xu, Z. L., a Xu, Z. Z., a Xue, G. F., k Yang, H. B., j Yang, P., j Yang, Y. Q., j Yang, Z. L., j Yao, H. J., j Yu, Y. H., j Yuan, Q., a h, Yue C., A, Zang J. J., A, Zhang D. L., C, Zhang F., M, Zhang J. B., C, Zhang J. Y., M, Zhang J. Z., J, Zhang L., A, I, Zhang, P. F., a Zhang, S. X., j Zhang, W. Z., k Zhang, Y., a i, Zhang Y. J., J, Zhang Y. Q., A, Y. L., c Zhang, Y. P., j Zhang, Z., a Zhang, Z. Y., c Zhao, H., m Zhao, H. Y., j Zhao, X. F., k Zhou, C. Y., k Zhou, Y., j Zhu, X., c Zhu, Y., k Zimmer, Ambrosi G., An Q., Asfandiyarov R., Azzarello P., Bernardini P., Cai M. S., Caragiulo M., Chang J., Chen D. Y., Chen H. F., Chen J. L., Chen W., Cui M. Y., Cui T. S., Dai H. T., D'Amone A., De Beneditti, De Mitri, I. Ding, Dong J. N., Dong T. K., Dong Y. F., Dong Z. X., Droz D., Duan K. K., Duan J. L., D'Urso D., Fan R. R., Fan Y. Z., iEmail Author, Fang F., Feng C. Q., Feng L., Fusco P., Gallo V., Gan F., Gao M., Gao S. S., Gargano F., Garrappa S., Gong K., Gong Y. Z., J. H. Email Author, Hu Y. M., Huang G. S., Huang Y. Y., Ionica M., Jiang D., Jiang W., Jin X., Kong J., Lei S. J., Li S., Li X., Li W. L., Li Y., Liang Y. F., Liang Y. M., Liao N. H., Liu C. M., Liu H., Liu J., Liu S. B., Liu W. Q., Liu Y., Loparco F., Ma M., Ma P. X., Ma S. Y., Ma T., Ma X. Q., Ma X. Y., Marsella G., Mazziotta M. N., Mo D., Niu X. Y., Pan X, Peng X. Y., Peng W. X., Qiao R., Rao J. N., Salinas M. M., Shang G. Z., Shen W. H., Shen Z. Q., Shen Z. T., Song J. X., Su H., Su M., Sun Z. Y., Surdo A., Teng X. J., Tian X. B., Tykhonov A., Vitillo S., Wang C., Wang H., Wang H. Y., Wang J. Z., Wang L. G., Wang Q., Wang S., Wang X. H., Wang X. L., Wang Y. F., Wang Y. P., Wang Y. Z., Wang Z. M., Wen S. C., Wei D. M., Wei J. J. a, Wei Y. F. c, Wu D. j, Wu J. a, h Wu, L. B. c Wu, S. S. k Wu, X. d Xi, K. j Xia, Z. Q. a h, Xin Y. L. a, Xu H. T. k, Xu Z. H. a, h Xu, Z. L. a Xu, Z. Z. a Xue, G. F. k Yang, H. B. j Yang, P. j Yang, Y. Q. j Yang, Z. L. j Yao, H. J. j Yu, Y. H. j Yuan, Q. a h, Yue C. a, Zang J. J. a, Zhang D. L. c, Zhang F. m, Zhang J. B. c, Zhang J. Y. m, Zhang J. Z. j, Zhang L. a, i Zhang, P. F. a Zhang, S. X. j Zhang, W. Z. k Zhang, Y. a i, Zhang Y. J. j, Zhang Y. Q. a, Y. L. c Zhang, Y. P. j Zhang, Z. a Zhang, Z. Y. c Zhao, H. m Zhao, H. Y. j Zhao, X. F. k Zhou, C. Y. k Zhou, Y. j Zhu, X. c Zhu, and Y. k Zimmer

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, FOS: Physical sciences, Cosmic ray, Scintillator, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Neutron detection, Dark Matter, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Calorimeter (particle physics), 010308 nuclear & particles physics, Detector, Settore FIS/01 - Fisica Sperimentale, Gamma ray, Astronomy, Astronomy and Astrophysics, Cosmic Rays, South Atlantic Anomaly, High Energy Physics::Experiment, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

The DArk Matter Particle Explorer (DAMPE), a satellite-based cosmic ray and gamma-ray detector, was launched on December 17, 2015, and began its on-orbit operation on December 24, 2015. In this work we document the on-orbit calibration procedures used by DAMPE and report the calibration results of the Plastic Scintillator strip Detector (PSD), the Silicon-Tungsten tracKer-converter (STK), the BGO imaging calorimeter (BGO), and the Neutron Detector (NUD). The results are obtained using Galactic cosmic rays, bright known GeV gamma-ray sources, and charge injection into the front-end electronics of each sub-detector. The determination of the boundary of the South Atlantic Anomaly (SAA), the measurement of the live time, and the alignments of the detectors are also introduced. The calibration results demonstrate the stability of the detectors in almost two years of the on-orbit operation.

Published
2019

5. Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission

Author

Fengtao Zhang, Y. F. Wang, Y. Y. Huang, Xiangpeng Guo, Jinfei Wu, D. Droz, J. N. Rao, Jinglai Duan, Yang Haibo, C. Liu, D. M. Wei, Zongye Zhang, X. Y. Ma, P. Azzarello, P. Fusco, Z. Y. Sun, Niu Xiaoyang, I. De Mitri, W. Zhang, Cihang Luo, C. Q. Feng, Yu Xing Cui, X. X. Li, M. S. Cai, Z.-Q. Shen, G. Marsella, X. L. Wang, S. Wang, F. Loparco, Guan Wen Yuan, Y. F. Wei, Jin Chang, Y. J. Zhang, Giacinto Donvito, W. X. Peng, J. L. Chen, Q. An, S. B. Liu, S. C. Wen, F. Gargano, Xiulian Pan, Y. Z. Gong, Cang Zhao, Yuqing Fan, T. S. Cui, H. T. Xu, A. De Benedittis, E. Catanzani, M. M. Salinas, Y. H. Yu, Zhao-Min Wang, Yun Long Zhang, Andrii Tykhonov, Wei Liu, Dingsong Wu, Zhenyu Zhang, Yifan Yang, G. F. Xue, Fang Fang, Pengtao Yang, M. Di Santo, R. Qiao, Yaohui Zhang, Xian Qiang Li, X. J. Bi, Chuan Yue, Min Gao, Z. Q. Xia, Shumei Wu, X. Y. Peng, M. M. Ma, Wenhan Jiang, J. Z. Wang, F. C. T. Barbato, M. Stolpovskiy, Hengchang Liu, F. Alemanno, P. Bernardini, J. J. Wei, Lihui Wu, Yujuan Liu, J. Liu, Yao Ming Liang, Z. Xu, A. Parenti, L. Feng, Yun-Zhi Zhang, A. Ruina, D. Mo, M. Y. Cui, Xin Wu, L. Silveri, Jun-jun Guo, Yu-Sa Wang, Hong Yun Zhao, W. Li, Hu-Rong Yao, Jinyuo Song, Z. Z. Xu, Z. X. Dong, Yan Fang Wang, Kun Fang, Y. Zhang, A. D'Amone, H. Su, Meng Su, A. Kotenko, Maria Ionica, Jie Kong, Shi-Jun Lei, Sheng Xia Zhang, Q. Yuan, Guangshun Huang, R. R. Fan, Peng-Xiong Ma, Xun Feng Zhao, Zhi Hui Xu, S.X. Li, A. Surdo, Yu-Xuan Zhu, X. J. Teng, Tie-Kuang Dong, W. H. Shen, Z. T. Shen, D. D'Urso, Zu-Cheng Chen, L. G. Wang, Dong Ya Guo, Xiaoyuan Huang, Y. M. Hu, F. de Palma, Hao Ting Dai, C. Perrina, Tianxiao Ma, Donghong Chen, Kai-Kai Duan, Maksym Deliyergiyev, D. Kyratzis, K. Gong, Chengrui Zhou, Mn Mazziotta, G. Z. Shang, Shuang Xue Han, J. J. Zang, Huaguang Wang, Alemanno F., An Q., Azzarello P., Barbato F.C.T., Bernardini P., Bi X.J., Cai M.S., Catanzani E., Chang J., Chen D.Y., Chen J.L., Chen Z.F., Cui M.Y., Cui T.S., Cui Y.X., Dai H.T., D'amone A., De Benedittis A., De Mitri I., De Palma F., Deliyergiyev M., Di Santo M., Dong T.K., Dong Z.X., Donvito G., Droz D., Duan J.L., Duan K.K., D'urso D., Fan R.R., Fan Y.Z., Fang K., Fang F., Feng C.Q., Feng L., Fusco P., Gao M., Gargano F., Gong K., Gong Y.Z., Guo D.Y., Guo J.H., Guo X.L., Han S.X., Hu Y.M., Huang G.S., Huang X.Y., Huang Y.Y., Ionica M., Jiang W., Kong J., Kotenko A., Kyratzis D., Lei S.J., Li S., Li W.L., Li X., Li X.Q., Liang Y.M., Liu C.M., Liu H., Liu J., Liu S.B., Liu W.Q., Liu Y., Loparco F., Luo C.N., Ma M., Ma P.X., Ma T., Ma X.Y., Marsella G., Mazziotta M.N., Mo D., Niu X.Y., Pan X., Parenti A., Peng W.X., Peng X.Y., Perrina C., Qiao R., Rao J.N., Ruina A., Salinas M.M., Shang G.Z., Shen W.H., Shen Z.Q., Shen Z.T., Silveri L., Song J.X., Stolpovskiy M., Su H., Su M., Sun Z.Y., Surdo A., Teng X.J., Tykhonov A., Wang H., Wang J.Z., Wang L.G., Wang S., Wang X.L., Wang Y., Wang Y.F., Wang Y.Z., Wang Z.M., Wei D.M., Wei J.J., Wei Y.F., Wen S.C., Wu D., Wu J., Wu L.B., Wu S.S., Wu X., Xia Z.Q., Xu H.T., Xu Z.H., Xu Z.L., Xu Z.Z., Xue G.F., Yang H.B., Yang P., Yang Y.Q., Yao H.J., Yu Y.H., Yuan G.W., Yuan Q., Yue C., Zang J.J., Zhang F., Zhang S.X., Zhang W.Z., Zhang Y., Zhang Y.J., Zhang Y.L., Zhang Y.P., Zhang Y.Q., Zhang Z., Zhang Z.Y., Zhao C., Zhao H.Y., Zhao X.F., Zhou C.Y., Zhu Y., Alemanno, F., An, Q., Azzarello, P., Barbato, F. C. T., Bernardini, P., Bi, X. J., Cai, M. S., Catanzani, E., Chang, J., Chen, D. Y., Chen, J. L., Chen, Z. F., Cui, M. Y., Cui, T. S., Cui, Y. X., Dai, H. T., D’Amone, A., De Benedittis, A., De Mitri, I., de Palma, F., Deliyergiyev, M., Di Santo, M., Dong, T. K., Dong, Z. X., Donvito, G., Droz, D., Duan, J. L., Duan, K. K., D’Urso, D., Fan, R. R., Fan, Y. Z., Fang, K., Fang, F., Feng, C. Q., Feng, L., Fusco, P., Gao, M., Gargano, F., Gong, K., Gong, Y. Z., Guo, D. Y., Guo, J. H., Guo, X. L., Han, S. X., Hu, Y. M., Huang, G. S., Huang, X. Y., Huang, Y. Y., Ionica, M., Jiang, W., Kong, J., Kotenko, A., Kyratzis, D., Lei, S. J., Li, S., Li, W. L., Li, X., Li, X. Q., Liang, Y. M., Liu, C. M., Liu, H., Liu, J., Liu, S. B., Liu, W. Q., Liu, Y., Loparco, F., Luo, C. N., Ma, M., Ma, P. X., Ma, T., Ma, X. Y., Marsella, G., Mazziotta, M. N., Mo, D., Niu, X. Y., Pan, X., Parenti, A., Peng, W. X., Peng, X. Y., Perrina, C., Qiao, R., Rao, J. N., Ruina, A., Salinas, M. M., Shang, G. Z., Shen, W. H., Shen, Z. Q., Shen, Z. T., Silveri, L., Song, J. X., Stolpovskiy, M., Su, H., Su, M., Sun, Z. Y., Surdo, A., Teng, X. J., Tykhonov, A., Wang, H., Wang, J. Z., Wang, L. G., Wang, S., Wang, X. L., Wang, Y., Wang, Y. F., Wang, Y. Z., Wang, Z. M., Wei, D. M., Wei, J. J., Wei, Y. F., Wen, S. C., Wu, D., Wu, J., Wu, L. B., Wu, S. S., Wu, X., Xia, Z. Q., Xu, H. T., Xu, Z. H., Xu, Z. L., Xu, Z. Z., Xue, G. F., Yang, H. B., Yang, P., Yang, Y. Q., Yao, H. J., Yu, Y. H., Yuan, G. W., Yuan, Q., Yue, C., Zang, J. J., Zhang, F., Zhang, S. X., Zhang, W. Z., Zhang, Y., Zhang, Y. J., Zhang, Y. L., Zhang, Y. P., Zhang, Y. Q., Zhang, Z., Zhang, Z. Y., Zhao, C., Zhao, H. Y., Zhao, X. F., Zhou, C. Y., and Zhu, Y.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Dark matter, General Physics and Astronomy, chemistry.chemical_element, FOS: Physical sciences, Cosmic ray, Space (mathematics), 01 natural sciences, 7. Clean energy, Cosmic ray, helium, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Energy spectrum, cosmic rays, dark matter, space, crystals, 010306 general physics, Helium, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), COSMIC cancer database, detector, Settore FIS/01 - Fisica Sperimentale, calibration, chemistry, Particle, Astrophysics - High Energy Astrophysical Phenomena, Nucleon, performance
Abstract

The measurement of the energy spectrum of cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years of data recorded by the DArk Matter Particle Explorer (DAMPE) is reported in this work. A hardening of the spectrum is observed at an energy of about 1.3 TeV, similar to previous observations. In addition, a spectral softening at about 34 TeV is revealed for the first time with large statistics and well controlled systematic uncertainties, with an overall significance of $4.3\sigma$. The DAMPE spectral measurements of both cosmic protons and helium nuclei suggest a particle charge dependent softening energy, although with current uncertainties a dependence on the number of nucleons cannot be ruled out., Comment: 11 pages, 13 figures, published in Phys. Rev. Lett. Add one more digit for first three columns in Table S2

Published
2021

6. Internal alignment and position resolution of the silicon tracker of DAMPE determined with orbit data

Author

S. Garrappa, Rui Qiao, M. Duranti, I. De Mitri, Maria Ionica, Fan Zhang, P. Bernardini, Hai-Hui Zhao, A. Bolognini, Keyun Gong, Juan Zhang, S. Vitillo, B. Bertucci, Yi-Fan Dong, V. Gallo, Shi-Jun Lei, Min Gao, Jun-jing Wang, M. M. Salinas, X. X. Li, M. N. Mazziotta, V. Vagelli, P. Azzarello, Diru Wu, Andrii Tykhonov, Shanta M. Zimmer, R. Asfandiyarov, D. D'Urso, G. Ambrosi, P. Fusco, G. Marsella, A. De Benedittis, A. D'Amone, F. Gargano, Franck Cadoux, D. La Marra, M. Di Santo, A. Surdo, Weiwei Peng, Xin Wu, Zhao-Min Wang, Huanyu Wang, F. Loparco, Ruirui Fan, Tykhonov, A., Ambrosi, G., Asfandiyarov, R., Azzarello, P., Bernardini, P., Bertucci, B., Bolognini, A., Cadoux, F., D'Amone, A., De Benedittis, A., De Mitri, I., Di Santo, M., Dong, Y. F., Duranti, M., D'Urso, D., Fan, R. R., Fusco, P., Gallo, V., Gao, M., Gargano, F., Garrappa, S., Gong, K., Ionica, M., La Marra, D., Lei, S. J., Li, X., Loparco, F., Marsella, G., Mazziotta, M. N., Peng, W. X., Qiao, R., Salinas, M. M., Surdo, A., Vagelli, V., Vitillo, S., Wang, H. Y., Wang, J. Z., Wang, Z. M., Wu, D., Wu, X., Zhang, F., Zhang, J. Y., Zhao, H., and Zimmer, S.

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Photon, Silicon, Proton, Physics::Instrumentation and Detectors, Alignment, Cosmic-ray detectors, Gamma-ray telescopes, Silicon-strip detectors, Instrumentation, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, chemistry.chemical_element, Electron, 01 natural sciences, Silicon-strip detector, Radiation length, Particle detector, Optics, 0103 physical sciences, 010303 astronomy & astrophysics, Image resolution, Nuclear and High Energy Physic, Physics, Range (particle radiation), 010308 nuclear & particles physics, business.industry, Settore FIS/01 - Fisica Sperimentale, Instrumentation and Detectors (physics.ins-det), Cosmic-ray detector, chemistry, Gamma-ray telescope, High Energy Physics::Experiment, business
Abstract

The DArk Matter Particle Explorer (DAMPE) is a space-borne particle detector designed to probe electrons and gamma-rays in the few GeV to 10 TeV energy range, as well as cosmic-ray proton and nuclei components between 10 GeV and 100 TeV. The silicon–tungsten tracker–converter is a crucial component of DAMPE. It allows the direction of incoming photons converting into electron–positron pairs to be estimated, and the trajectory and charge (Z) of cosmic-ray particles to be identified. It consists of 768 silicon micro-strip sensors assembled in 6 double layers with a total active area of 6.6 m 2 . Silicon planes are interleaved with three layers of tungsten plates, resulting in about one radiation length of material in the tracker. Internal alignment parameters of the tracker have been determined on orbit, with non-showering protons and helium nuclei. We describe the alignment procedure and present the position resolution and alignment stability measurements.

Published
2018
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7. In-flight performance of the DAMPE silicon tracker

Author

Weiwei Peng, Rui Qiao, Xin Wu, Maria Ionica, M. Duranti, R. Asfandiyarov, G. Ambrosi, P. Azzarello, A. Surdo, G. Marsella, V. Vagelli, A. De Benedittis, S. Vitillo, P. Fusco, Andrii Tykhonov, M. M. Salinas, Min Gao, Hai-Hui Zhao, F. Loparco, Jun-jing Wang, Ruirui Fan, Keyun Gong, Juan Zhang, M. N. Mazziotta, D. La Marra, F. Gargano, P. Bernardini, Stefan Zimmer, A. D'Amone, Yi-Fan Dong, A. Bolognini, Fan Zhang, Zhao-Min Wang, Franck Cadoux, M. Di Santo, B. Bertucci, V. Gallo, S. Garrappa, D. D'Urso, Diru Wu, I. De Mitri, Haoning Wang, Tykhonov, A., Ambrosi, G., Asfandiyarov, R., Azzarello, P., Bernardini, P., Bertucci, B., Bolognini, A., Cadoux, F., D'Amone, A., De Benedittis, A., De Mitri, I., Di Santo, M., Dong, Y. F., Duranti, M., D'Urso, D., Fan, R. R., Fusco, P., Gallo, V., Gao, M., Gargano, F., Garrappa, S., Gong, K., Ionica, M., La Marra, D., Loparco, F., Marsella, G., Mazziotta, M. N., Peng, W. X., Qiao, R., Salinas, M. M., Surdo, A., Vagelli, V., Vitillo, S., Wang, H. Y., Wang, J. Z., Wang, Z. M., Wu, D., Wu, X., Zhang, F., Zhang, J. Y., Zhao, H., and Zimmer, S.

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Dark matter, FOS: Physical sciences, Cosmic ray, Scintillator, 01 natural sciences, 7. Clean energy, Optics, 0103 physical sciences, Neutron detection, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Cosmic rays, Instrumentation, Nuclear and High Energy Physic, Astroparticle physics, Physics, Calorimeter (particle physics), 010308 nuclear & particles physics, business.industry, Settore FIS/01 - Fisica Sperimentale, Detector, Gamma rays, Instrumentation and Detectors (physics.ins-det), Spaceborne experiment, Silicon tracker, High Energy Physics::Experiment, Astrophysics - Instrumentation and Methods for Astrophysics, business
Abstract

DAMPE (DArk Matter Particle Explorer) is a spaceborne high-energy cosmic ray and gamma-ray detector , successfully launched in December 2015. It is designed to probe astroparticle physics in the broad energy range from few GeV to 100 TeV. The scientific goals of DAMPE include the identification of possible signatures of Dark Matter annihilation or decay, the study of the origin and propagation mechanisms of cosmic-ray particles, and gamma-ray astronomy . DAMPE consists of four sub-detectors: a plastic scintillator strip detector, a Silicon–Tungsten tracKer–converter (STK), a BGO calorimeter and a neutron detector . The STK is composed of six double layers of single-sided silicon micro-strip detectors interleaved with three layers of tungsten for photon conversions into electron–positron pairs . The STK is a crucial component of DAMPE, allowing to determine the direction of incoming photons, to reconstruct tracks of cosmic rays and to estimate their absolute charge (Z). We present the in-flight performance of the STK based on two years of in-flight DAMPE data, which includes the noise behavior, signal response, thermal and mechanical stability, alignment and position resolution.

Published
2019

8. The DArk Matter Particle Explorer mission

Author

M. M. Ma, Y.L. Xin, Shengxia Zhang, Y. Y. Huang, Y. Z. Gong, H.Y. Zhao, P. Fusco, Zhao-Qiang Shen, Peidong Yang, Zhao-Min Wang, Yuan Zhu Wang, Maria Ionica, Jie Kong, Yun Long Zhang, F. Loparco, Dan Jiang, J.N. Dong, Y. L. Li, X. Y. Peng, J. L. Chen, H. S. Chen, S. C. Wen, Y. F. Dong, Jinglai Duan, P. Azzarello, N. H. Liao, X. L. Wang, M. M. Salinas, M. Caragiulo, Ya Peng Zhang, M. Pohl, V. Gallo, W. Zhang, Andrii Tykhonov, Niu Xiaoyang, Hai Tao Xu, X. X. Li, Shi-Jun Lei, G. Marsella, Wei Jiang, Min Gao, M. S. Cai, X. Zhu, Z. X. Dong, Yong Zhou, S. Y. Ma, Wei Liang Li, A. De Benedittis, Q. An, Sha Wu, Deng Yi Chen, Y. F. Wei, J.B. Zhang, T.T. Miao, G. F. Xue, Chuan Yue, Z.L. Yang, Y.F. Liang, P. Bernardini, Yifan Yang, Laiyu Zhang, Jianyi Yang, W. X. Peng, Z. M. Zhang, Giacinto Donvito, L. G. Wang, J. G. Lu, Y. J. Zhang, R. Qiao, Shan-Shan Gao, Zi-Qing Xia, Hui Jun Yao, Zhi-Yu Sun, Fang Fang, Yi-Zhong Fan, S. Vitillo, Jie Liu, S. Li, J. J. Wei, R. R. Fan, Lei Feng, Y. Zhu, K. Xi, A. D'Amone, Peng-Xiong Ma, Ping Zhang, Xun Feng Zhao, Jianli Zhang, M. N. Mazziotta, H. Su, Di Wu, Y. M. Hu, Da Ming Wei, Chang Yi Zhou, A. Surdo, Yang Liu, Yen-Po Wang, D. Droz, D. D'Urso, W. Chen, Jian Wu, Jin Zhou Wang, F. Zhang, Q. Wang, Jian Hua Guo, M. Duranti, X. J. Teng, Tie-Kuang Dong, I. De Mitri, Xiao Yong Ma, W. H. Shen, X.B. Tian, Chao Zhang, Z. T. Shen, Hong Yun Zhao, Z. Xu, Chang Qing Feng, T. S. Cui, Chunjie Wang, Ju-Xian Song, G. Ambrosi, Q.Z. Liu, Xiaohui Wang, Haiyan Wang, Y. Zhang, X.Q. Ma, Meng Su, D. Mo, Yan Fang Wang, R. Asfandiyarov, Yao Ming Liang, B. Bertucci, Stephan Zimmer, Guang Shun Huang, Yang Haibo, X. Jin, Zhenyu Zhang, M. Di Santo, Tao Ma, Xin Wu, M. Y. Cui, Yongjie Zhang, Yu-Hong Yu, H. Liu, J. N. Rao, Qiang Yuan, S. B. Liu, Jilong Zhang, Chi Wang, W.Q. Gan, Wenqiang Liu, V. Vagelli, Zi Zong Xu, Jin Chang, F. J. Gan, F. Gargano, D.L. Zhang, H. W. Wang, Kai-Kai Duan, K. Gong, G. Z. Shang, Shu Xin Wang, J. J. Zang, Chang, J., Ambrosi, G., An, Q., Asfandiyarov, R., Azzarello, P., Bernardini, P., Bertucci, B., Cai, M. S., Caragiulo, M., Chen, D. Y., Chen, H. F., Chen, J. L., Chen, W., Cui, M. Y., Cui, T. S., D'Amone, A., DE BENEDITTIS, Antonio, De Mitri, I., DI SANTO, Margherita, Dong, J. N., Dong, T. K., Dong, Y. F., Dong, Z. X., Donvito, G., Droz, D., Duan, K. K., Duan, J. L., Duranti, M., D'Urso, D., Fan, R. R., Fan, Y. Z., Fang, F., Feng, C. Q., Feng, L., Fusco, P., Gallo, V., Gan, F. J., Gan, W. Q., Gao, M., Gao, S. S., Gargano, F., Gong, K., Gong, Y. Z., Guo, J. H., Hu, Y. M., Huang, G. S., Huang, Y. Y., Ionica, M., Jiang, D., Jiang, W., Jin, X., Kong, J., Lei, S. J., Li, S., Li, X., Li, W. L., Li, Y., Liang, Y. F., Liang, Y. M., Liao, N. H., Liu, Q. Z., Liu, H., Liu, J., Liu, S. B., Liu, W. Q., Liu, Y., Loparco, F., Lã¼, J., Ma, M., Ma, P. X., Ma, S. Y., Ma, T., Ma, X. Q., Ma, X. Y., Marsella, G., Mazziotta, M. N., Mo, D., Miao, T. T., Niu, X. Y., Pohl, M., Peng, X. Y., Peng, W. X., Qiao, R., Rao, J. N., Salinas, M. M., Shang, G. Z., Shen, W. H., Shen, Z. Q., Shen, Z. T., Song, J. X., Su, H., Su, M., Sun, Z. Y., Surdo, A., Teng, X. J., Tian, X. B., Tykhonov, A., Vagelli, V., Vitillo, S., Wang, C., Wang, Chi, Wang, H., Wang, H. Y., Wang, J. Z., Wang, L. G., Wang, Q., Wang, S., Wang, X. H., Wang, X. L., Wang, Y. F., Wang, Y. P., Wang, Y. Z., Wen, S. C., Wang, Z. M., Wei, D. M., Wei, J. J., Wei, Y. F., Wu, D., Wu, J., Wu, S. S., Wu, X., Xi, K., Xia, Z. Q., Xin, Y. L., Xu, H. T., Xu, Z. L., Xu, Z. Z., Xue, G. F., Yang, H. B., Yang, J., Yang, P., Yang, Y. Q., Yang, Z. L., Yao, H. J., Yu, Y. H., Yuan, Q., Yue, C., Zang, J. J., Zhang, C., Zhang, D. L., Zhang, F., Zhang, J. B., Zhang, J. Y., Zhang, J. Z., Zhang, L., Zhang, P. F., Zhang, S. X., Zhang, W. Z., Zhang, Y., Zhang, Y. J., Zhang, Y. Q., Zhang, Y. L., Zhang, Y. P., Zhang, Z., Zhang, Z. Y., Zhao, H., Zhao, H. Y., Zhao, X. F., Zhou, C. Y., Zhou, Y., Zhu, X., Zhu, Y., Zimmer, S., DE BENEDITTIS, ANTONIO, DI SANTO, MARGHERITA, and Lü, J.

Subjects
Physics - Instrumentation and Detectors, Satellite launches, Gamma ray observatories, Astrophysics, Galactic cosmic rays, 01 natural sciences, Cosmology, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Observatory, Detectors and Experimental Techniques, Cosmic rays , dark matter , space experiments, 010303 astronomy & astrophysics, physics.ins-det, Space science missions, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), astro-ph.HE, Astrophysics::Instrumentation and Methods for Astrophysics, Instrumentation and Detectors (physics.ins-det), Cosmology, Galaxies, Gamma rays, Tellurium compounds, Chinese Academy of Sciences, Dark matter particles, Explorer missions, Galactic cosmic rays, Gamma ray observatories, Satellite launches, Scientific objectives, Space science missions, Cosmic rays, Space Science, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Particle Physics - Experiment, Astrophysics and Astronomy, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, FOS: Physical sciences, Cosmic ray, dark matter, Tellurium compounds, 0103 physical sciences, Cosmic rays, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010308 nuclear & particles physics, hep-ex, Gamma rays, Astronomy, Astronomy and Astrophysics, Galaxies, Chinese academy of sciences, Galaxy, Scientific objectives, Dark matter particles, Chinese Academy of Sciences, Satellite, space experiments, Explorer missions, astro-ph.IM
Abstract

The DArk Matter Particle Explorer (DAMPE), one of the four scientific space science missions within the framework of the Strategic Pioneer Program on Space Science of the Chinese Academy of Sciences, is a general purpose high energy cosmic-ray and gamma-ray observatory, which was successfully launched on December 17th, 2015 from the Jiuquan Satellite Launch Center. The DAMPE scientific objectives include the study of galactic cosmic rays up to $\sim 10$ TeV and hundreds of TeV for electrons/gammas and nuclei respectively, and the search for dark matter signatures in their spectra. In this paper we illustrate the layout of the DAMPE instrument, and discuss the results of beam tests and calibrations performed on ground. Finally we present the expected performance in space and give an overview of the mission key scientific goals., 45 pages, including 29 figures and 6 tables. Published in Astropart. Phys

Published
2017

9. Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons

Author

J. N. Rao, D. M. Wei, P. Azzarello, Peng-Xiong Ma, Y. H. Yu, Shan-Shan Gao, Chi Wang, Q. An, L. G. Wang, YM Liang, Dong Ya Guo, Min Gao, Z. X. Dong, Jie Liu, Tianxiao Ma, Donghong Chen, Wei Liu, Yifan Yang, Zhihua Zhang, Jun-jun Guo, Y. F. Liang, S. Wang, Huan Zhao, D.L. Zhang, X.Q. Ma, Maria Ionica, Jie Kong, G. Ambrosi, Luzhao Feng, Yu-Sa Wang, Fang Fang, N. H. Liao, D. Mo, Niu Xiaoyang, Yaping Wang, R. Qiao, Qiuju Yuan, I. De Mitri, X.B. Tian, Z. Z. Xu, Zheng Wang, Michael Ma, R. Asfandiyarov, X. X. Li, Y. M. Hu, M. S. Cai, Guangshun Huang, M. Di Santo, H. Liu, J.N. Dong, Z.-Q. Shen, Zhongjie Yang, W. X. Peng, Peidong Yang, Jialong Chen, Stephan Zimmer, Y. F. Wei, K. Xi, Laiyu Zhang, Zhi-Yu Sun, W. Li, F. Loparco, X. L. Wang, Chao Zhang, Y. J. Zhang, Y. Z. Gong, Jindong Zhang, X. Y. Ma, M. Duranti, Kai-Kai Duan, Y. Zhang, Yun-Zhi Zhang, R. R. Fan, Valerio Vagelli, Xixian Wang, Ju-Xian Song, G. Marsella, Meng Su, Yaohui Zhang, Xian-Min Jin, S.X. Li, S. B. Liu, Huijun Yao, Andrii Tykhonov, J. J. Wei, Lihui Wu, X. Y. Peng, H. T. Xu, Yujuan Liu, Hong Yun Zhao, Jie Zhang, S. Y. Ma, Z. Q. Xia, Dan Jiang, Yali Zhou, X. J. Teng, Tie-Kuang Dong, S. C. Wen, Y. Li, A. D'Amone, Yi-Zhong Fan, K. Gong, J. Z. Wang, Yugang Zhang, H. S. Chen, Chengrui Zhou, Giacinto Donvito, Yang Haibo, Zhoubin Zhang, P. Bernardini, W. H. Shen, M. Y. Cui, G. Z. Shang, Chuan Yue, Jindan Zhang, Di Wu, Xin-Fu Zhao, Y. Y. Huang, Z. T. Shen, Qian Wang, P. Fusco, Shumei Wu, J. J. Zang, Y. F. Dong, Jinfei Wu, C. Q. Feng, Jinglai Duan, Huaguang Wang, B. Bertucci, Jin Chang, F. J. Gan, F. Gargano, M. N. Mazziotta, H. Su, Haiqiong Wang, Fengtao Zhang, Z. Xu, Pengchao Zhang, Xin Wu, Y. F. Wang, S. Vitillo, D. Droz, T. S. Cui, V. Gallo, W. Zhang, Wei Jiang, G. F. Xue, S. Garrappa, Yu-Xuan Zhu, D. D'Urso, Shi-Jun Lei, M. M. Salinas, Y.L. Xin, Xi Zhu, Shengxia Zhang, A. Surdo, A. De Benedittis, Wangli Chen, Ambrosi, G., An, Q., Asfandiyarov, R., Azzarello, P., Bernardini, P., Bertucci, B., Cai, M. S., Chang, J., Chen, D. Y., Chen, H. F., Chen, J. L., Chen, W., Cui, M. Y., Cui, T. S., D’Amone, A., De Benedittis, A., De Mitri, I., Di Santo, M., Dong, J. N., Dong, T. K., Dong, Y. F., Dong, Z. X., Donvito, G., Droz, D., Duan, K. K., Duan, J. L., Duranti, M., D’Urso, D., Fan, R. R., Fan, Y. Z., Fang, F., Feng, C. Q., Feng, L., Fusco, P., Gallo, V., Gan, F. J., Gao, M., Gao, S. S., Gargano, F., Garrappa, S., Gong, K., Gong, Y. Z., Guo, D. Y., Guo, J. H., Hu, Y. M., Huang, G. S., Huang, Y. Y., Ionica, M., Jiang, D., Jiang, W., Jin, X., Kong, J., Lei, S. J., Li, S., Li, X., Li, W. L., Li, Y., Liang, Y. F., Liang, Y. M., Liao, N. H., Liu, H., Liu, J., Liu, S. B., Liu, W. Q., Liu, Y., Loparco, F., Ma, M., Ma, P. X., Ma, S. Y., Ma, T., Ma, X. Q., Ma, X. Y., Marsella, G., Mazziotta, M. N., Mo, D., Niu, X. Y., Peng, X. Y., Peng, W. X., Qiao, R., Rao, J. N., Salinas, M. M., Shang, G. Z., H. Shen, W., Shen, Z. Q., Shen, Z. T., Song, J. X., Su, H., Su, M., Sun, Z. Y., Surdo, A., Teng, X. J., Tian, X. B., Tykhonov, A., Vagelli, V., Vitillo, S., Wang, C., Wang, H., Wang, H. Y., Wang, J. Z., Wang, L. G., Wang, Q., Wang, S., Wang, X. H., Wang, X. L., Wang, Y. F., Wang, Y. P., Wang, Y. Z., Wen, S. C., Wang, Z. M., Wei, D. M., Wei, J. J., Wei, Y. F., Wu, D., Wu, J., Wu, L. B., Wu, S. S., Wu, X., Xi, K., Xia, Z. Q., Xin, Y. L., Xu, H. T., Xu, Z. L., Xu, Z. Z., Xue, G. F., Yang, H. B., Yang, P., Yang, Y. Q., Yang, Z. L., Yao, H. J., Yu, Y. H., Yuan, Q., Yue, C., Zang, J. J., Zhang, C., Zhang, D. L., Zhang, F., Zhang, J. B., Zhang, J. Y., Zhang, J. Z., Zhang, L., Zhang, P. F., Zhang, S. X., Zhang, W. Z., Zhang, Y., Zhang, Y. J., Zhang, Y. Q., Zhang, Y. L., Zhang, Y. P., Zhang, Z., Zhang, Z. Y., Zhao, H., Zhao, H. Y., Zhao, X. F., Zhou, C. Y., Zhou, Y., Zhu, X., Zhu, Y., and Zimmer, S.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Dark matter, FOS: Physical sciences, Cosmic ray, Electron, 01 natural sciences, dark matter, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Positron, cosmic rays, 0103 physical sciences, 010303 astronomy & astrophysics, Cherenkov radiation, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, cosmic rays , dark matter , electrons , space experiments, Multidisciplinary, Annihilation, 010308 nuclear & particles physics, Settore FIS/01 - Fisica Sperimentale, Spectrum (functional analysis), electrons, Galaxy, High Energy Physics - Phenomenology, High Energy Physics::Experiment, space experiments, Astrophysics - High Energy Astrophysical Phenomena
Abstract

High energy cosmic ray electrons plus positrons (CREs), which lose energy quickly during their propagation, provide an ideal probe of Galactic high-energy processes and may enable the observation of phenomena such as dark-matter particle annihilation or decay. The CRE spectrum has been directly measured up to $\sim 2$ TeV in previous balloon- or space-borne experiments, and indirectly up to $\sim 5$ TeV by ground-based Cherenkov $\gamma$-ray telescope arrays. Evidence for a spectral break in the TeV energy range has been provided by indirect measurements of H.E.S.S., although the results were qualified by sizeable systematic uncertainties. Here we report a direct measurement of CREs in the energy range $25~{\rm GeV}-4.6~{\rm TeV}$ by the DArk Matter Particle Explorer (DAMPE) with unprecedentedly high energy resolution and low background. The majority of the spectrum can be properly fitted by a smoothly broken power-law model rather than a single power-law model. The direct detection of a spectral break at $E \sim0.9$ TeV confirms the evidence found by H.E.S.S., clarifies the behavior of the CRE spectrum at energies above 1 TeV and sheds light on the physical origin of the sub-TeV CREs., Comment: 18 pages, 6 figures, Nature in press, doi:10.1038/nature24475

Published
2017

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