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

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ZHAO Lei, LIU Shu-Bin and AN Qi. Proposal of the readout electronics for the WCDA in the LHAASO experiment[J]. Chinese Physics C, 2014, 38(1): 016101. doi: 10.1088/1674-1137/38/1/016101
ZHAO Lei, LIU Shu-Bin and AN Qi. Proposal of the readout electronics for the WCDA in the LHAASO experiment[J]. Chinese Physics C, 2014, 38(1): 016101.  doi: 10.1088/1674-1137/38/1/016101 shu
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Received: 2013-03-13
Revised: 1900-01-01
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Proposal of the readout electronics for the WCDA in the LHAASO experiment

    Corresponding author: AN Qi,

Abstract: 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 Cherenkov Detector Array) is one of the major components. In the WCDA, a total of 3600 PMTs are placed under water in four ponds, each with a size of 150 m× 150 m. Precise time and charge 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 tested in the laboratory.

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