Scientists & Staff

Benedikt Geiger

Position title: Principal Investigator, Professor


Benedikt Geiger started his career at UW-Madison in February 2019 and has become the Principle Investigator of the HSX stellarator experiment June 2023. His research interests are the experimental investigation of turbulent particle and heat transport with the aim to develop new turbulence-optimized stellarator experiments. He teaches in the field of nuclear engineering and plasma physics.

David T. Anderson

Position title: Co-Principal Investigator, Founder


David Anderson is the Jim and Anne Sorden Professor of Electrical and Computer Engineering and the Principal Investigator for the HSX Program. He has been associated with HSX since its initial design activities in 1990, and teaches in the areas of electrodynamics and plasma physics.

Benjamin Faber

Position title: Scientist


Benjamin holds a PhD in Physics for the University of Wisconsin-Madison and is an expert on turbulence in stellarator devices. A computational physicist by training, he currently holds a staff scientist position in the Department of Engineering Physics at UW-Madison working on building new tools and infrastructure for stellarator optimization, with a focus on turbulent optimization.

Ben Knowles

Position title: Instrumentation Technologist


Ben Knowles received his MS in Astrophysics from the University of Colorado at Boulder in 2001, and was the ISS Calibration Engineer for the Cassini Mission during its tour of Saturn. He has also worked in private industry as a Software and Controls Engineer, focusing on automation and scientific instrumentation. He moved to the HSX team in August of 2021, where he develops and maintains the HSX computer and data acquisition network.

Rex Wagner

Position title: Operations Director


Rex comes to HSX with 20+ years of engineering experience in aerospace, automotive, and nuclear industries.

Christopher Seyfert


Chris joined UW Madison in 2021 as an instrumentation engineer and is our expert for the HSX vacuum system, high voltage power supplies and the design of low noise amplifiers.

George Tryfonos


George joined the HSX lab in 2023.

Chris Hegna

Position title: Professor


Joseph N. Talmadge

Position title: Scientist, Founder