Progress in accelerators has always gone hand in hand with the achievable strength and quality of magnets. As we look toward upgrades of the Large Hadron Collider and beyond it toward a notional future circular collider, pushing magnets beyond the present state of the art — in both performance and affordability — looms even larger in importance. The U.S. Magnet Development Program, led by Berkeley Lab, aggressively pursues the development of superconducting accelerator magnets that operate as closely as possible to the fundamental limits. More…