Preparing a residual resistivity ratio measurement apparatus to be lowered into a cryostat.

Central to all progress in materials and magnets is the ability to test and evaluate performance under relevant conditions. This requires both advanced testing facilities and the expertise to design, build, support, and properly utilize the facilities to meet research and project needs.

The BCMT has extensive materials and magnet testing facilities for superconductors and superconducting magnets. Materials testing equipment includes microscopy facilities, Instron mechanical testing capabilities, and in-field transport-current measurements up to 16 T. For magnets, BCMT operates a helium liquefier and a magnet testing facility with an approximately 900 mm diameter test cryostat; a main (24 kA) power supply with high-speed data collection, magnet protection, and an energy extraction system; and a secondary (4.8 kA) power supply and magnet protection system. All these tools are designed to support testing of two interconnected systems, such as hybrid low- and high-temperature superconducting magnets.

Using a coordinate-measurement machine for 3-D mapping of magnetic fields of an ALS Upgrade quadrupole magnet.

The magnet test facility features a rotating coil measurement system for assessing local and integrated multipoles of accelerator magnets. A key feature of BCMT superconducting magnet testing is the capacity to incorporate innovative diagnostics and instruments, including acoustic sensors, fiber optics, and Hall-probe arrays.

For permanent magnet-based systems and resistive multipole magnets, several specialized field measurement systems are available, including systems to measure the magnetization vector of permanent magnet blocks, Hall probe systems to gauge the field along the axis of undulators, stretched-wire systems to measure integrated multipoles, and a modified Coordinate Measuring Machine with a 3-axis Hall probe, enabling complex 3D mapping of magnetic fields.