A U.S. Department of Energy multipurpose research laboratory on Long Island, New York — contributing to fusion through accelerator-based materials testing, superconducting magnet development, and advanced plasma diagnostics.
Brookhaven National Laboratory (BNL), operated by Brookhaven Science Associates for the U.S. Department of Energy, is a multidisciplinary research facility located in Upton, New York. While best known for discoveries in nuclear and particle physics (including seven Nobel Prizes), Brookhaven maintains active programmes in energy sciences, materials characterization, and accelerator technology that intersect directly with fusion energy development.[1]
Brookhaven has a decades-long history in superconducting magnet R&D, dating to its role in building magnets for the Relativistic Heavy Ion Collider (RHIC). This expertise translates to fusion applications: high-field superconducting coils are essential for confining plasma in tokamaks and stellarators. BNL scientists collaborate with ITER and private fusion companies on conductor testing, quench protection, and high-temperature superconductor (HTS) cable development.[2]
Fusion reactors subject structural materials to extreme neutron fluences, heat loads, and electromagnetic stresses. Brookhaven's Center for Functional Nanomaterials and the NSLS-II synchrotron enable researchers to probe radiation-induced defects, measure hydrogen isotope retention in tungsten and advanced alloys, and validate computational models of material degradation under fusion-relevant conditions.[3]
BNL's expertise in beam physics and particle acceleration supports fusion in less obvious ways: accelerator-driven neutron sources can simulate the 14.1 MeV neutron spectrum expected in D-T reactors, enabling component testing without a full fusion plasma. Additionally, Brookhaven researchers contribute to plasma diagnostics development and computational plasma physics through collaborative programmes with other DOE laboratories.
As a DOE Office of Science laboratory, Brookhaven participates in multi-lab initiatives including INFUSE partnerships and contributes to the broader U.S. fusion strategy through materials qualification, magnet engineering, and diagnostic innovation.