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| CERN EMC Group | |
|---|---|
| Name | CERN EMC Group |
| Established | 1990s |
| Institution | European Organization for Nuclear Research |
| Location | Meyrin |
| Focus | Electromagnetic compatibility, radiation effects, electromagnetic interference |
| Members | multidisciplinary engineers and physicists |
CERN EMC Group The CERN EMC Group is a specialist research unit within the European Organization for Nuclear Research focused on electromagnetic compatibility, electromagnetic interference, and radiation-induced effects affecting accelerators, detectors, and associated electronics. The group provides technical guidance, testing services, and standards development for projects across particle physics facilities such as the Large Hadron Collider complex, as well as for instrumentation used in experiments like ATLAS and CMS. It engages with engineering divisions, safety services, and international laboratories to mitigate risks from electromagnetic disturbances and ionizing radiation.
The group addresses electromagnetic compatibility issues arising in accelerator infrastructure at sites including Meyrin and Prévessin and in detectors deployed at experiments such as LHCb and ALICE. Its remit spans interference reduction for power converters used in the Super Proton Synchrotron, immunity testing for control systems in the Antiproton Decelerator, and radiation-hardness assurance for front-end electronics in experiments like NA62. Members collaborate with instrumentation teams from institutes such as CERN Technical Department, European Space Agency, and university laboratories across Europe and beyond.
Formed in response to increasing complexity of electronics in accelerator controls during upgrades to facilities including the LEP and subsequent construction of the Large Hadron Collider, the group evolved from earlier EMC activities at the CERN Electrical Engineering Group. It expanded during machine upgrade periods such as the LHC Injector Upgrade and the High-Luminosity Large Hadron Collider preparation. The group participated in development efforts for radiation-tolerant designs informed by failure analyses from incidents at experiments like OPERA and by operational lessons from the Superconducting Super Collider era. Over time the unit assimilated standards work influenced by committees such as International Electrotechnical Commission and European Committee for Electrotechnical Standardization.
The group comprises engineers, physicists, and technicians drawn from the CERN Engineering Department, CERN Accelerator Beam Department, and collaborating university groups from institutions like École Polytechnique Fédérale de Lausanne, University of Oxford, and Università di Roma La Sapienza. Leadership typically reports to the head of the relevant technical department and coordinates with safety authorities such as CERN Radiation Protection Group. Membership includes specialists in radio-frequency systems, power electronics, signal integrity, and radiation effects, with secondments from national laboratories including DESY, Fermilab, and TRIUMF.
Primary research areas encompass electromagnetic interference mitigation for power systems in installations such as the LHC superconducting magnets, susceptibility testing for control electronics in cryogenic environments like those in ISOLDE, and dose-rate testing of semiconductor devices used in readout systems for ATLAS Muon Spectrometer and CMS Tracker. Activities include conducted and radiated emissions measurements, transient susceptibility studies relevant to incidents like beam loss events at the CERN SPS, and modelling of electromagnetic propagation in accelerator tunnels informed by computational electromagnetics tools used by groups such as CERN OpenLab. The group also develops qualification protocols for commercial off-the-shelf components used by collaborations including ALICE Collaboration.
Testing and characterisation are performed in dedicated laboratories and shielded enclosures at CERN sites, including anechoic chambers and reverberation rooms adapted for high-energy physics hardware. Instrumentation includes spectrum analysers, vector network analysers, radiated field probes, pulse generators for single-event effects emulation, and climate-controlled radiation test benches used for experiments similar to those at CERN Test Beam Facility. Facilities support compatibility verification for systems such as beam instrumentation from Beam Instrumentation Group and power converters developed in partnership with groups like STFC Rutherford Appleton Laboratory.
The EMC Group maintains formal and informal partnerships with standards bodies and laboratories including European Space Agency, ESA Technical Centre, ITER Organization for fusion diagnostics compatibility, and national research centres such as CNRS and INFN. It contributes to working groups of the International Electrotechnical Commission and participates in cross-disciplinary projects with computing initiatives like CERN openlab and detector R&D consortia tied to experiments including CMS Upgrade and ATLAS Upgrade. Collaborative test campaigns have been carried out in coordination with EMI Test Facilities and industry partners including multinational suppliers of power electronics and semiconductor manufacturers.
The group runs training courses and practical workshops on EMC best practices, radiation-tolerant design, and susceptibility mitigation for engineers and physicists from collaborations such as LHCb Collaboration and partner universities including Imperial College London. It supervises doctoral and postdoctoral research projects funded through programmes like Marie Skłodowska-Curie Actions and engages in outreach via technical talks at conferences such as IEEE International Symposium on Electromagnetic Compatibility and Radiation Effects Data Workshop.
Contributions include development of EMC standards applied to cryogenic power systems of the Large Hadron Collider, qualification procedures that reduced failure rates in detector readout electronics for ATLAS and CMS, and methodology for mitigating electromagnetic transients during beam dump events informed by studies of the SPS beam dynamics. The group’s work has influenced procurement specifications across collaborations and supported detector uptime improvements during major runs such as LHC Run 2 and preparations for Run 3.