Characterization of a high bandwidth readout chain for the CMS Phase-2 pixel upgrade

TL;DR

This paper details the characterization and testing of a high-bandwidth readout chain designed for the CMS Phase-2 pixel detector upgrade, involving high-speed data transmission components and optical links.

Contribution

It presents the system-level characterization and testing of the new high-speed readout chain for the CMS pixel detector upgrade.

Findings

Successful data transmission at 160 Mbps per chip

Optical links operate reliably at 10 Gbps

Readout chain meets performance requirements for HL-LHC

Abstract

The CMS collaboration is building a new inner tracking pixel detector for the High-Luminosity LHC. Each pixel readout chip will be controlled with a single serial input stream at 160 Mbps and will send out data via four current mode logic (CML) 1.28 Gbps outputs. The readout chips will be grouped in modules and connected with up to 1.6 meters long low-mass electrical links to Low-Power Gigabit Transceivers (lpGBT) and Versatile Link PLUS Transceiver (VTRx+) modules that send the data optically to off-detector electronics at 10 Gbps. The characterization of these components and system tests of the readout chain are presented.