02gL

02gL is an alphanumeric designation that appears in records of the European Organisation for Nuclear Research (CERN) as the identifier of a series of small‑scale superconducting magnets used in the Compact Muon Solenoid detector construction. The designation first appeared in the internal project database of 2003 and was used to catalogue a set of prototype magnets built between 2004 and 2006. The 02gL series magnets have a bore diameter of 30 cm, are fabricated from niobium–titanium alloy, and operate at cryogenic temperatures of 1.9 kelvin. According to engineering notes, the magnets achieved field strengths of 4 teslas with a current density of 25 ampere per square centimeter. The design was later superseded by the 03gM series due to improved performance parameters and reduced maintenance.

Contemporary literature includes a 2016 technical note that references 02gL as a historical benchmark for magnet design parameters in high‑energy physics experiments. The designation has not been used in any operational equipment since 2010 and is considered obsolete. However, it remains in use in archival documentation and is cited in several scholarly articles on the evolution of superconducting magnet technology. No commercial products or consumer goods carry the 02gL designation, and it does not appear in standard coding systems such as ISO 4217, EAN, or ISBN. The designation is occasionally encountered in retrospective analyses of legacy CERN documentation.