# VCI2016 - The 14th Vienna Conference on Instrumentation

Feb 15 – 19, 2016
Vienna University of Technology
Europe/Vienna timezone

## Design and properties of electronmagnetic particle detectors of LHAASO-KM2A

Not scheduled
15m
Vienna University of Technology

#### Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Board: 6
Poster Astroparticle Detectors

### Speaker

Mr Zhongquan Zhang (Shandong University)

### Description

Large High Altitude Air Shower Observation (LHAASO) is a proposed cosmic ray experiment which will be built in Daocheng, Sichuan Province of China, 4400m in altitude. One square kilometer detector array (KM2A) is focused on the exploring for origin of cosmic ray and studying on the knee physics, etc, which consists of 5242 electromagnetic particle detectors (EDs) and 1146 muon detectors (MDs). ED array is designed to measure the densities and arrival times of their secondary particles in the extensive air showers (EASs). ED is plastic scintillation detector, in which a layer of 5mm-thick lead installed to increase the detection efficiency of secondary gammas. The performances of ED have been studied, such as detection efficiency, time resolution. Especially, a wide dynamic particle density range from 1 to 10000particles/m2 is realized with the design of PMT divider.

### Primary authors

Dr Bo Gao (Insititute of High Energy Physics, CAS) Mr Zhongquan Zhang (Shandong University)

### Co-authors

Dr Hanrong Wu (Insititute of High Energy Physics, CAS) Ms Jinyan Liu (University of Nankai, Tianjin, China) Dr Mingjun Chen (Insititute of High Energy Physics, CAS) Ms Xiaojie Wang (Insititute of High Energy Physics, CAS) Prof. Zhiguo Yao (Insititute of High Energy Physics, CAS)