Alternating magnetic fields cause electrons to emit light in a free electron laser at KEK.As Intel, Samsung, TSMC, and Japan’s upcoming advanced foundry Rapiduseach make their separate preparations to cram more and more transistors into every square millimeter of silicon, one thing they all have in common is that the extreme ultraviolet (EUV) lithography technology underpinning their efforts is extremely complex, extremely expensive, and extremely costly to operate. A prime reason is that the so...