Author(s)
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Antchev, G (CERN ; Sofiya, Inst. Nucl. Res.) ; Barney, D (CERN) ; Bialas, W (CERN) ; Bonilla Osorio, R S (Andes U., Bogota) ; Chen, K F (Taiwan, Natl. Normal U.) ; Kuo, C M (Taiwan, Natl. Central U.) ; Lu, R S (Taiwan, Natl. Normal U.) ; Patras, V (Ioannina U.) ; Reynaud, S (CERN) ; Rodriguez Estupinan, P (Andes U., Bogota) ; Vichoudis, P (CERN) |
Abstract
| The CMS Preshower is a fine grain detector that comprises 4288 silicon sensors, each containing 32 strips. The data are transferred from the detector to the counting room via 1208 optical fibres producing a total data flow of 72GB/s. For their readout, 40 multi-FPGA 9U VME boards are used. This article is focused on the commissioning of the VME readout system using two tools: a custom connectivity test system based on FPGA embedded logic analyzers read out through JTAG and an FPGA-based system that emulates the data-traffic from the detector. Additionally, the performance of the VME readout system in the CMS experiment, including the 2009 Cosmic ray at Four Tesla (CRAFT) run, is discussed. |