On-detector Electronics for the LHCb VELO Upgrade

Abstract

The LHCb Experiment is designed for precision measurements of CP violation and rare decays of beauty and charm hadrons. The experiment will be upgraded to a trigger-less system reading out the full detector at a 40 MHz event rate with all selection algorithms executed in a CPU farm. The upgraded Vertex Locator will be a hybrid pixel detector read out by the VeloPix ASIC with on-chip zero-suppression. The overview of the system and the design of the VELO on-detector electronics that include the front-end hybrid, the opto-conversion and power distribution boards will be summarised. The results from the evaluation of these prototypes and further enhancement techniques will be discussed.

High speed electrical transmission line design and characterization

“…Its functionality is to carry data from the LHCb upgrade VELO modules to the vacuum interface [7]. Concerning design characteristics, it has 0.2 mm trace width and spacing and 100 ohms differential impedance.…”

“…The LHCb Velo upgrade data transmission tape was designed with the following criteria: 56 cm long, data transmission rate of 5.12 Gbps with differential signalling and mechanical flexibility. Its functionality is to carry data from the LHCb upgrade VELO modules to the vacuum interface [7]. Concerning design characteristics, it has 0.2 mm trace width and spacing and 100 ohms differential impedance.…”

GBTX emulator for development and special versions of GBT-based readout chains

“…Many readout systems have been created based on the GBTX [7][8][9][10]. For the STS and MUCH detectors in the CBM experiment, dedicated front-end ASICs [11] have been developed, together with a special HCTSP protocol [12] oriented on communication via AC-coupled links.…”

Selection of hardware platform for CBM Common Readout Interface

“…Many readout systems have been created based on the GBTX [7][8][9][10]. For the STS and MUCH detectors in the CBM experiment, dedicated front-end ASICs [11] have been developed, together with a special HCTSP protocol [12] oriented on communication via AC-coupled links.…”