Readout Method Based on PCIe Over Optical Fiber for CBM-TOF Super Module Quality Evaluation

The compressed baryonic matter (CBM) experiment will investigate the quantum chromodynamics phase diagram at high net baryon densities and moderate temperatures. CBM time-of-flight (TOF) system is composed of super modules containing high-performance multigap resistive plate chambers (MRPCs). During...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2019-07, Vol.66 (7), p.1165-1168
Main Authors: Yuan, Jianhui, Cao, Ping, Huang, Xiru, Li, Chao, An, Qi
Format: Article
Language:English
Subjects:
Baryons
Bus interconnections
Clocks
Connectors
Data acquisition
Digitization
Electronics
Evaluation
Mass production
Modules
Optical fiber
Optical fibers
Optical switches
peripheral component interconnect express (PCIe)
Phase diagrams
Quality assessment
Quantum chromodynamics
readout electronics
Repeaters
Resistive plate chambers
Transmission line measurements
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Summary:The compressed baryonic matter (CBM) experiment will investigate the quantum chromodynamics phase diagram at high net baryon densities and moderate temperatures. CBM time-of-flight (TOF) system is composed of super modules containing high-performance multigap resistive plate chambers (MRPCs). During the mass production, each super module assembled with MRPCs needs quality evaluation, which includes time measurement and data readout. Read out electronics encounter the challenge of reading data from a super module at a speed of about 6 Gb/s. In this paper, a read out method based on peripheral component interconnect express (PCIe) over optical fiber is proposed for CBM-TOF super module quality evaluation. The digitized data from super module will be concentrated at the front-end electronics and then be transmitted to a PCIe switch module (PSM) over optical fiber using PCIe protocol. The PSM is directly plugged into the motherboard via vertical edge card connector at the back-end data acquisition server. With this readout method, a high-speed transmission rate can be reached. Furthermore, a PSM can receive data from several super modules simultaneously, which is important to improve the evaluation efficiency. This readout method simplifies the architecture of readout electronics and supports long-distance transmission between front end and back end.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2019.2892494