RD53 collaboration

RD53 collaboration
Name	RD53 collaboration
Formation	2013
Purpose	Development of pixel readout integrated circuits for high-luminosity collider experiments
Region	International
Members	CERN; DESY; INFN; CNRS; University of Bonn; University of Geneva; University of Glasgow

RD53 collaboration

The RD53 collaboration was an international research consortium focused on the design and development of advanced pixel readout integrated circuits for high-radiation environments in particle physics experiments. Its work connected institutions such as CERN, DESY, INFN, CNRS, and universities including University of Bonn, University of Geneva, and University of Glasgow, and contributed to upgrades for experiments like ATLAS and CMS at the Large Hadron Collider. The collaboration coordinated test-beam campaigns, irradiation studies, and integration activities with semiconductor foundries and detector laboratories.

Overview

RD53 brought together engineers and physicists from national laboratories and universities to produce radiation-hard, high-bandwidth application-specific integrated circuits (ASICs) for pixel detectors. The program interfaced with technologies and organizations such as TSMC and GF (GlobalFoundries) for CMOS fabrication, worked with detector R&D groups at CERN’s ISOLDE and SPS facilities, and aligned with upgrade programs for ATLAS and CMS in preparation for the High-Luminosity Large Hadron Collider. RD53 outputs were evaluated in beamlines at facilities like DESY Test Beam Facility and CERN North Area.

History and Formation

RD53 formed in the early 2010s to address limitations of pixel readout chips under the expected fluences of the High-Luminosity LHC upgrade. The initiative evolved from earlier detector R&D efforts including the RD50 and ROSE projects and coordinated with tracker upgrade activities for ATLAS and CMS. Founding members included research groups from CERN, DESY, INFN, CNRS/IN2P3, KEK, and multiple European universities. The collaboration formalized design requirements, procurement strategies with foundries like TSMC, and test plans leveraging beamlines at CERN and DESY.

Collaboration Goals and Scope

Primary goals were to design multi-channel, radiation-tolerant pixel readout ASICs capable of operating at high hit rates, to validate architectures for both hybrid and monolithic pixel detectors, and to ensure compatibility with sensor technologies such as Planar silicon sensors and 3D silicon sensors. The scope encompassed analog front-end design, digital architecture, high-speed serial links (including serializers compatible with GBT-like protocols), power distribution strategies used in ATLAS IBL and CMS Phase-2 Upgrade, and full-system integration for module-level testing in infrastructures like the ATLAS Pixel Phase-I Upgrade test stands.

Detector Technologies and RD53 ASICs

RD53 produced reference ASICs that implemented front-end amplifiers, discrimination, time-over-threshold measurement, and buffering suitable for tens of megahertz per pixel hit rates. The designs targeted advanced CMOS nodes used by industry partners such as TSMC and sought radiation tolerance techniques used in projects like ATLAS IBL and CMS Pixel. Test chips explored architectures for small-pitch pixels compatible with Bump bonding and for hybrid assemblies using Readout boards and Module Control Chips. ASIC prototypes were characterized with lab setups at CERN laboratories, irradiation campaigns at facilities like PSI and TRIUMF, and integration tests with sensor groups from FNAL and Brookhaven National Laboratory.

Key Projects and Test Beam Campaigns

RD53 coordinated multi-site beam campaigns at infrastructures including the CERN PS and SPS beamlines, the DESY Test Beam Facility, and electron beamlines at ELSA and ELEPHANT-class setups. These campaigns validated timing, spatial resolution, and efficiency for prototype modules destined for ATLAS and CMS upgrades and supported performance comparisons with devices from FE-I4 and other readout families. Radiation hardness assurance involved proton and neutron irradiations at facilities like TRIUMF and KIT, and joint test programs with collaborations such as PIXELAV-related simulation groups.

Organization and Membership

The collaboration governance included technical coordination, working groups for analog design, digital architecture, system integration, and test-beam coordination, with institutional representatives from CERN, DESY, INFN, CNRS/IN2P3, KEK, FNAL, Brookhaven National Laboratory, and multiple universities (e.g., University of Glasgow, University of Bonn, University of Geneva, University of Manchester). Project management interfaced with funding agencies such as European Commission programs and national research councils to align deliverables with the upgrade schedules of ATLAS and CMS.

Impact and Legacy

RD53 outputs informed the pixel readout solutions deployed in the High-Luminosity Large Hadron Collider upgrades and influenced subsequent ASIC projects across particle physics and medical imaging communities. The collaboration’s design methodologies, radiation-hard layout techniques, and test protocols were adopted by follow-on efforts in detector R&D and education programs at institutions like CERN School of Computing and national laboratories including FNAL and Brookhaven National Laboratory. Its legacy persists in the pixel systems of modern collider detectors and in the transferred expertise to semiconductor fabrication partners such as TSMC and GlobalFoundries.

Category:Particle detector collaborations