Purpose To complement and ensure redundancy in th. endcap muon system of th. Compact Muon Solenoid(CMS)detector and to extend th. Resistive Plate Ch.mber(RPC)system coverage,improved RPCs(iRPCs)with.eith.r orth.gonal ...
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Purpose To complement and ensure redundancy in th. endcap muon system of th. Compact Muon Solenoid(CMS)detector and to extend th. Resistive Plate Ch.mber(RPC)system coverage,improved RPCs(iRPCs)with.eith.r orth.gonal layer strips with.one-end electronics or single layer strips with.two-end electronics providing more precise time measurement will be installed in th. very forward pseudorapidity region of|η|h.Timing,Trigger and fast Control(TTC)and Slow Control(SC)into one data stream over a bi-directional optical link with.a line rate of 4.8 Gb/s between th. Front-End Electronics(FEE)and th. Back-End Electronics(BEE).To fulfill th.se requirements,a prototype BEE for th. iRPC 2D ch.mber h.s been research.d and *** A Micro-Telecommunication and Computing Arch.tecture(μTCA)-based processing card was designed in th.s study to establish.a prototype system togeth.r with.aμTCA *** Giga-Bit Transceiver(GBT)protocol is integrated to provide bi-directional communication between th. FEE and BEE.A server is connected with.th. BEE by a Gigabit Eth.rnet(GbE)link for SC and a 10-GbE link for Data AcQuisition(DAQ).Results Th. Bit Error Rate(BER)test of th. back-end board and a joint test with.th. iRPC 2D prototype ch.mber were *** less th.n 1.331×10−16 was *** timemeasurement with.a resolution of 3.05 nswas successfully realized,and detector efficiencies of 97.7%for longitudinal strips and 96.0%for orth.gonal strips were *** results demonstrate th. correctness and reliability of th. prototype *** Th. BEE prototype satisfies th. requirements for th. iRPC 2D ch.mber,and it worked stably and reliably during a long-term joint test run.
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