Development of an ADC radiation tolerance characterization system for the upgrade of the ATLAS LAr calorimeter

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Hong-Bin Liu, Hu-Cheng Chen, Kai Chen, James Kierstead, Francesco Lanni, Helio Takai and Ge Jin. Development of an ADC radiation tolerance characterization system for the upgrade of the ATLAS LAr calorimeter[J]. Chinese Physics C, 2017, 41(2): 026101. doi: 10.1088/1674-1137/41/2/026101
Hong-Bin Liu, Hu-Cheng Chen, Kai Chen, James Kierstead, Francesco Lanni, Helio Takai and Ge Jin. Development of an ADC radiation tolerance characterization system for the upgrade of the ATLAS LAr calorimeter[J]. Chinese Physics C, 2017, 41(2): 026101.  doi: 10.1088/1674-1137/41/2/026101 shu
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Received: 2016-06-15
Revised: 2016-08-26
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    Supported by the U. S. Department of Energy (DE-SC001270)

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Development of an ADC radiation tolerance characterization system for the upgrade of the ATLAS LAr calorimeter

    Corresponding author: Hong-Bin Liu,
  • 1. State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
  • 2. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • 3. Brookhaven National Laboratory, Upton NY 11973, U. S. A
  • 4.  Brookhaven National Laboratory, Upton NY 11973, U. S. A
Fund Project:  Supported by the U. S. Department of Energy (DE-SC001270)

Abstract: ATLAS LAr calorimeter will undergo its Phase-I upgrade during the long shutdown (LS2) in 2018, and a new LAr Trigger Digitizer Board (LTDB) will be designed and installed. Several commercial-off-the-shelf (COTS) multi-channel high-speed ADCs have been selected as possible backups of the radiation tolerant ADC ASICs for the LTDB. To evaluate the radiation tolerance of these backup commercial ADCs, we developed an ADC radiation tolerance characterization system, which includes the ADC boards, data acquisition (DAQ) board, signal generator, external power supplies and a host computer. The ADC board is custom designed for different ADCs, with ADC drivers and clock distribution circuits integrated on board. The Xilinx ZC706 FPGA development board is used as a DAQ board. The data from the ADC are routed to the FPGA through the FMC (FPGA Mezzanine Card) connector, de-serialized and monitored by the FPGA, and then transmitted to the host computer through the Gigabit Ethernet. A software program has been developed with Python, and all the commands are sent to the DAQ board through Gigabit Ethernet by this program. Two ADC boards have been designed for the ADC, ADS52J90 from Texas Instruments and AD9249 from Analog Devices respectively. TID tests for both ADCs have been performed at BNL, and an SEE test for the ADS52J90 has been performed at Massachusetts General Hospital (MGH). Test results have been analyzed and presented. The test results demonstrate that this test system is very versatile, and works well for the radiation tolerance characterization of commercial multi-channel high-speed ADCs for the upgrade of the ATLAS LAr calorimeter. It is applicable to other collider physics experiments where radiation tolerance is required as well.

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