Proposal of the readout electronics for the WCDA in the LHAASO experiment

The LHAASO （Large High Altitude Air Shower Observatory） experiment is proposed for a very high energy gamma ray source survey, in which the WCDA （Water Cherellkov Detector Array） is one of the major coinponents. In the WCDA, a total of 3600 PMTs are placed under water in four ponds, each with a size...

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Published inChinese physics C Vol. 38; no. 1; pp. 56 - 60
Main Author 赵雷 刘树彬 安琪
Format Journal Article
LanguageEnglish
Published 2014
Subjects
Architecture
Arrays
Charge
Clocks
Commands
Detectors
Electronics
Proposals
信号幅度
信号测量
光电倍增管
实验方案
探测器阵列
混合传输
电子设备
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ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/38/1/016101

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Summary:The LHAASO （Large High Altitude Air Shower Observatory） experiment is proposed for a very high energy gamma ray source survey, in which the WCDA （Water Cherellkov Detector Array） is one of the major coinponents. In the WCDA, a total of 3600 PMTs are placed under water in four ponds, each with a size of 150m×150 m. Precise time and cimrge measurement is required for the PMT signals, over a large signal amplitude range from a single P.E. （photo electron） to 4000 P.E. To fulfill the high requirement of a signal measurement in so many front end nodes scattered in a large area, special techniques are developed, such as multiple gain readout, hybrid transmission of clocks, commands and data, precise clock phase alignment and new trigger electronics. We present the readout electronics architecture for the WCDA and several prototype modules, which are now being testedin the laboratory.
Bibliography:The LHAASO （Large High Altitude Air Shower Observatory） experiment is proposed for a very high energy gamma ray source survey, in which the WCDA （Water Cherellkov Detector Array） is one of the major coinponents. In the WCDA, a total of 3600 PMTs are placed under water in four ponds, each with a size of 150m×150 m. Precise time and cimrge measurement is required for the PMT signals, over a large signal amplitude range from a single P.E. （photo electron） to 4000 P.E. To fulfill the high requirement of a signal measurement in so many front end nodes scattered in a large area, special techniques are developed, such as multiple gain readout, hybrid transmission of clocks, commands and data, precise clock phase alignment and new trigger electronics. We present the readout electronics architecture for the WCDA and several prototype modules, which are now being testedin the laboratory.
11-5641/O4
ZHAO Lei LIU Shu-Bin AN Qi1 State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China; 2 Departnmnt of Modern Physics, University of Science and Technology of China, Hefei 230026, China
WCDA, LHAASO, readout electronics, PMT
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/38/1/016101