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About

W. Fischer is a leading figure in accelerator physics and vacuum technology, whose work has been instrumental in overcoming critical performance limitations at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. His primary research focuses on developing innovative *in-situ* coating and cleaning techniques for long, small-diameter vacuum tubes. Fischer’s major contributions include the design and operation of a robotic plasma magnetron “mole” that can deposit thick, low-secondary-electron-yield (SEY) copper coatings directly inside accelerator beam pipes. This technology simultaneously tackles two major challenges: suppressing electron clouds that degrade beam quality, and mitigating unacceptable ohmic heating in high-resistivity stainless steel tubes. His most-cited works, including a 2015 paper on the plasma sputtering robotic device (4 citations) and a 2010 paper on a versatile discharge cleaning and coating device (4 citations), have laid the groundwork for future accelerator upgrades. By enabling *in-situ* deposition of oxygen-free high-conductivity (OFHC) copper, Fischer’s innovations provide a practical, scalable solution to enhance machine performance and reliability, making him a key contributor to the advancement of high-energy particle accelerators.