Measurement of high energy cosmic rays by the new Tibet hybrid experiment

Amenomori, M.; Bi, X. J.; Chen, D; Chen, T. L.; Chen, W. Y.; Cui, S. W.; Na, Danzengluobu; Ding, L. K.; Feng, C.; Feng, Z.; Feng, Z. Y.; Gou, Q. B.; Guo, Yingying; He, H. H.; He, Ze; Hibino, K.; Hotta, N.; Hu, Haibing; Hu, Haibing; Huang, J.; Jia, H. Y.; Jiang, L.; Kajino, F.; Kasahara, K.; Katayose, Y.; Kato, C.; Kawata, K.; Kozai, M.; na, Labaciren; Le, G. M.; Li, A. F.; Li, H. J.; Li, W. J.; Liu, C.; Liu, J. S.; Liu, M. Y.; Lu, H.; Meng, X. R.; Miyazaki, Tetsuya; Mizutani, K.; Munakata, K.; Nakajima, T.; Nakamura, Yuya; Nanjo, H.; Nakamura, Masaki; Niwa, T.; Ohnishi, M.; Ohta, I.; Ozawa, S.; Qian, X. L.; Qu, X. B.; Saito, T.; Sakata, M.; Sako, T. K.; Shao, J.; Shibata, M.; Shirai, T.; Sugimoto, H.; Takita, M.; Tan, Y. H.; Tateyama, N.; Torii, Shoji; Tsuchiya, H.; Udo, S.; Wang, H.; Wu, H. R.; Xue, L.; Yamamoto, Yoshitaka; Yamauchi, K.; Yang, Z.; Yuan, A. F.; Yuda, T.; Zhai, L. M.; Zhang, H. M.; Zhang, J. L.; Zhang, X. Y.; Zhang, Y.; Zhang, Yi; Zhang, Ying; na, Zhaxisangzhu; Zhou, X. X.

doi:10.22323/1.301.0484

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…The site is 4300 m above the sea level, corresponding to an atmospheric depth of 606 g/cm 2 . The experiment started operation since the beginning of the observatory [17]. It is expected to stop data taking when the LHAASO is fully operational.…”

Section: High Mountain Air Shower and Cmb Experimentsmentioning

confidence: 99%

The experimental program at IHEP of CAS

Wang¹

2020

J. Inst.

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The Institute of High Energy Physics (IHEP) is a comprehensive research center for the study of particle physics in China. It hosts or manages a number of key China based projects in operation or in preparation, and plays a major role in planning future research in the field. The rearch program at IHEP covers from the underground reactor neutrino experiments, collider experiments, high mountain air shower experiments, to space missions. In this note a few selected experiments are introduced.

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Section: High Mountain Air Shower and Cmb Experimentsmentioning

confidence: 99%

The experimental program at IHEP of CAS

Wang¹

2020

J. Inst.

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“…The residual time of measured and expected arrival time is used for the time offset calibration. Using extensive air showers (EAS) events to calibrate the time offsets between all detector cells was adopted by several experiments such as ARGO-ybj [7,8], Tibet AS-γ [9] and HAWC [10].…”

Section: Jinst 14 T10003mentioning

confidence: 99%

LHAASO-WCDA time calibration using high-statistic low-energy cosmic rays

et al. 2019

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A: The Large High Altitude Air Shower Observatory (LHAASO) is a multi-component experiment to study cosmic ray physics, which is under construction near Mt. Haizishan (4410 m a.s.l.) in Southwest China. The 78,000 m 2 Water Cherenkov Detector Array (WCDA), which is one of the main components of the LHAASO, will be able to survey the gamma-ray sky continuously in the energy range from 100 GeV to PeV. The precision of the time measurement in the detector cells of WCDA determines the sensitivity to the direction of gamma ray sources, necessitating a hardware calibration system to be deployed in the WCDA. Effects such as environment temperature variations will introduce time offsets between detector cells. In order to calibrate the time offset, a method using high-statistics low-energy cosmic rays has been developed. The detector cells are divided into clusters of 6×6 cells which are calibrated locally. This paper then describes the technique combining all the detector cells and demonstrates that the performance meets the requirements. The high-statistics of low-energy cosmic rays makes it possible to calibrate the detector in real time. K: Data processing methods; Pattern recognition, cluster finding, calibration and fitting methods 1Corresponding author.

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“…For example, the environment temperature will affect the fibers in the calibration modules, which has impact on the performance of the calibration system. A solution is to use extensive air showers (EAS) events to calibrate the time offsets between all detector cells, a method that was adopted by several experiments such as ARGO-YBJ [6,7], Tibet AS-γ [8] and HAWC [9]. For WCDA scale detector arrays, all cells can be fired only with very-high-energy events.…”

Section: Overview Of Time Calibration Systemmentioning

confidence: 99%

The study on the LHAASO-WCDA time calibration

Liu¹,

Gao²,

Zha³

et al. 2019

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

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The Large High Altitude Air Shower Observatory (LHAASO) is a multipurpose experiment, which is now under construction at Mt. Haizishan (4410 m a.s.l.), Daocheng, Sichun, China. The 78,000 m 2 Water Cherenkov Detector Array (WCDA), one of main components of the LHAASO, can be able to survey the gamma-ray sky continuously in a wide energy range. The precision of the angular resolution is a key factor for the detection sensitivity of the gamma-ray sources. To reach the designed angular resolution, a time calibration system with a good accuracy is needed. A hardware calibration system based on optical fibers and blue LEDs have be deployed in WCDA, which provides initial time offsets for later analysis. Beside some other factors, such as PMT position differences and other unknown effects, will introduce additional time offsets between the detector cells. In order to calibrate such differences, an offline software calibration procedure based on the offline air shower data is suggested. In this paper, all above details in hardware and offline software calibration are introduced, some preliminary experimental result are also presented.

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Measurement of high energy cosmic rays by the new Tibet hybrid experiment

Cited by 4 publications

References 6 publications

The experimental program at IHEP of CAS

The experimental program at IHEP of CAS

LHAASO-WCDA time calibration using high-statistic low-energy cosmic rays

The study on the LHAASO-WCDA time calibration

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