Readout Electronics for CBM-TOF Supermodule Quality Evaluation

A supermodule assembled with multiple resistive plate chamber detectors is a component of time-of-flight (TOF) system for the compressed baryonic matter (CBM) experiment. Before the supermodules are applied to CBM-TOF, their quality needs to be evaluated. The readout electronics is confronted with a...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2019-07, Vol.66 (7), p.1190-1193
Main Authors: Jiang, Wei, Huang, Xiru, Cao, Ping, Li, Chao, Wang, Junru, Li, Jiawen, Yuan, Jianhui, An, Qi
Format: Article
Language:English
Subjects:
Backplanes
Compressed baryonic matter time of flight (CBM-TOF)
Data acquisition
data acquisition (DAQ) circuits
Data transmission
Digital multimedia broadcasting
Electronics
Ethernet
Evaluation
Field programmable gate arrays
Gigabit Ethernet
Modules
Optical fibers
Quality assessment
Readout electronics
Resistive plate chambers
Software
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Description
Summary:A supermodule assembled with multiple resistive plate chamber detectors is a component of time-of-flight (TOF) system for the compressed baryonic matter (CBM) experiment. Before the supermodules are applied to CBM-TOF, their quality needs to be evaluated. The readout electronics is confronted with a tremendous challenge of transmitting data at the maximal speed of 6 Gb/s. In this paper, the readout method for the CBM-TOF supermodule quality evaluation is presented. A parallel architecture based on the Gigabit Ethernet is designed to meet the requirement for data transmission rate. First, the data are sent from the front-end electronics to four readout module groups via optical fibers at the maximal rate of 1.5 Gb/s per fiber. Next, the data are further distributed to 16 parallel daughter readout models so that the maximal data throughput of each daughter readout module is 375 Mb/s, within its capacity of 550 Mb/s. Finally, the readout daughter modules send data to the data acquisition software through the standard Gigabit Ethernet. The proposed readout method has the advantage of good scalability, so it can meet different requirements for variable data rate. The preliminary test result shows that each of four parallel readout groups can transmit data at the speed of 1.6 Gb/s, which indicates that the overall readout system can meet the requirement for the maximal data-transmission speed of 6 Gb/s.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2019.2900657