Design and performances of electromagnetic particle detector for LHAASO-KM2A

ZHAO Jing; LIU Jia; SHENG Xiang-Dong; HE Hui-Hai; GUO Yi-Qing; HOU Chao; L&Uuml; Hong-Kui

doi:10.1088/1674-1137/38/3/036002

Chinese Physics C> 2014, Vol. 38> Issue(3) : 036002 DOI: 10.1088/1674-1137/38/3/036002

Design and performances of electromagnetic particle detector for LHAASO-KM2A

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Abstract：
In the Large High Altitude Air Shower Observatory (LHAASO) project, the one kilometer square extensive air shower array (KM2A) is the the largest detector array in terms of effective area. It consists of 5635 electromagnetic particle detectors (EDs) and 1221 muon detectors (MDs). Each ED is composed of 16 scintillator tiles readout by wavelength-shifting fibers that are bundled and attached by a 25 mm PMT. The design of the unit and its performances, such as photoelectron yield, time resolution and uniformity, are discussed in detail. An assembling scheme for the whole ED is established to guarantee the uniformity throughout all 16 tiles in a single ED and all EDs in mass production.

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ZHAO Jing, LIU Jia, SHENG Xiang-Dong, HE Hui-Hai, GUO Yi-Qing, HOU Chao and LÜ Hong-Kui. Design and performances of electromagnetic particle detector for LHAASO-KM2A[J]. Chinese Physics C, 2014, 38(3): 036002. doi: 10.1088/1674-1137/38/3/036002

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Received: 2013-04-03
Revised: 2013-07-02

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沈阳化工大学材料科学与工程学院沈阳 110142

Design and performances of electromagnetic particle detector for LHAASO-KM2A

Corresponding author: ZHAO Jing,

Received Date: 2013-04-03
Accepted Date: 2013-07-02
Available Online: 2014-03-05

Abstract: In the Large High Altitude Air Shower Observatory (LHAASO) project, the one kilometer square extensive air shower array (KM2A) is the the largest detector array in terms of effective area. It consists of 5635 electromagnetic particle detectors (EDs) and 1221 muon detectors (MDs). Each ED is composed of 16 scintillator tiles readout by wavelength-shifting fibers that are bundled and attached by a 25 mm PMT. The design of the unit and its performances, such as photoelectron yield, time resolution and uniformity, are discussed in detail. An assembling scheme for the whole ED is established to guarantee the uniformity throughout all 16 tiles in a single ED and all EDs in mass production.