The return to CERN as a Member State in 1983 marked the renaissance of high-energy physics in Spain. In the same year, a special programme for particle physics was created within the framework of the Spanish National Plan for research and development. The continuation of the original programme serves today to coordinate and fund most of the experimental and theoretical particle and astroparticle physics research in Spain.
A substantial part of the experimental high-energy physics activities in Spain is carried out at research institutes. Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT) in Madrid, Institut de Fisica d'Altes Energies (IFAE) in Barcelona and Consejo Superior de Investigaciones Científicas (CSIC) in Valencia play leading roles in detector construction and R&D activities. This effort is complemented by the activities of several other university groups such as Santander, Santiago de Compostela and Zaragoza, and research centres. Additional support to all groups is provided by the National Center for Particle, Astroparticle and Nuclear Physics (CPAN). Several theory groups are very active in particle physics, studying a wide range of topics from phenomenology to mathematical physics. Spain also actively participates in most European Grid activities.
Spanish industry has participated in the construction of the LHC and its detectors, and has benefitted from an important transfer of technologies from CERN to Spain.