SPS North Area

SPS North Area
Name	SPS North Area
Location	CERN
Established	1976
Type	High-energy fixed-target complex
Operated by	CERN

SPS North Area The SPS North Area is a fixed-target experimental complex at CERN served by the Super Proton Synchrotron (SPS). It supports a broad program of particle, nuclear, and applied physics experiments and interfaces with international projects from institutions such as University of Oxford, Imperial College London, Fermi National Accelerator Laboratory, Massachusetts Institute of Technology, and Institut national de physique nucléaire et de physique des particules. The facility integrates beam delivery, target stations, beamlines, and infrastructure that connect to experiments and detectors developed by collaborations including NA61/SHINE, COMPASS, NA62, ATHENA, and others.

History

The North Area originated with the construction of the Super Proton Synchrotron in the 1970s, expanding during upgrade phases associated with experimental programs like NA10 and NA11. The area evolved through milestone projects including support for the Omega spectrometer era and later for the COMPASS programme. Key organizational developments involved coordination with the European Organization for Nuclear Research research divisions and agreements with national laboratories such as CERN's member states and partner institutes like DESY, KEK, INFN, CEA Saclay, and Max Planck Society. Funding and upgrade cycles were influenced by strategic roadmaps from entities such as the European Strategy for Particle Physics and national research councils including the Science and Technology Facilities Council.

Layout and Infrastructure

The North Area layout comprises multiple beamlines branching from the Super Proton Synchrotron extraction points, servicing experimental halls such as the TCC2 and hall complexes that host fixed-target setups. Beam transport magnets, powered by systems similar to those used in the Large Electron–Positron Collider era, route protons and secondary beams to target stations and dump systems modeled on designs from the Proton Synchrotron and ISOLDE facility. Supporting infrastructure includes cryogenics and cooling systems developed in collaboration with groups like CERN Cryogenics, power converters following standards from the European Organization for Nuclear Research technical teams, and data acquisition networks interoperable with computing centers such as the CERN Data Centre and grid sites like GridPP and Open Science Grid.

Accelerator Operations

Beam scheduling in the North Area coordinates with the SPS operations team, accelerator physics groups, and experiment spokespersons to allocate cycles for programs like the long-baseline neutrino initiatives and hadron physics campaigns. Operations rely on timing and control frameworks derived from the CERN Accelerator Complex control systems, with beam diagnostics developed alongside institutes such as Paul Scherrer Institute, Brookhaven National Laboratory, and CEA. Maintenance and intervention procedures mirror standards used at facilities such as Fermilab Main Injector and J-PARC, while machine studies are often conducted in collaboration with accelerator research groups including CERN BE Department and CERN EN-MME groups.

Experiments and Beamlines

The North Area supports experiments across hadron spectroscopy, heavy-ion collisions, neutrino physics, and detector development. Notable experiments include COMPASS (hadron structure), NA61/SHINE (hadron production), NA62 (rare kaon decays), and test-beam campaigns for collaborations such as ATLAS, CMS, LHCb, and ALICE. Beamlines such as H2, H4, H6, and H8 provide secondary beams derived from primary SPS protons for experiments including detector R&D by groups from ETH Zurich, University of Geneva, University of Liverpool, and University of Manchester. Instrumentation efforts engage detector groups like CERN RD51, calorimetry teams from LAPP, tracking groups affiliated with CERN EP, and data-acquisition developers working with HEP Software Foundation.

Safety and Radiation Protection

Radiation protection in the North Area follows standards established by the International Commission on Radiological Protection and regulatory frameworks coordinated with host state authorities and institutional safety services such as CERN Radiation Protection Group. Shielding, interlock systems, and access control are designed in consultation with experts from Health Physics Society, Institut de Radioprotection et de Sûreté Nucléaire, and national regulators. Environmental monitoring involves dosimetry networks, air and water sampling procedures, and waste management protocols comparable to practices at Fermilab and RAL. Emergency planning integrates local fire services, CERN Fire Brigade, and medical response units alongside contingency plans matching international best practices.

Upgrades and Future Plans

Planned upgrades and proposals involve intensity upgrades for secondary beams, improved target station designs, and enhanced beam optics developed with accelerator research projects like HiLumi LHC studies and proposals referenced in the European Strategy for Particle Physics. Detector and beamline modernization projects engage collaborations from INFN, STFC, CERN Technology Department, and universities including University of Zürich and University of Basque Country. Future programmatic directions consider synergies with neutrino initiatives such as DUNE and facilities like SHiP and SPL proposals, while infrastructure improvements plan for integration with grid and cloud computing efforts from CERN Openlab and the Worldwide LHC Computing Grid.

Category:CERN