My research interests are in beam and plasma physics, trapping and measuring the spectral and gravitational properties of antihydrogen, free electron lasers, and climate change. He shared the John Dawson Award for Excellence in Plasma Physics Research (2011). He is a Member of the ALPHA (Antihydrogen Laser Physics Apparatus) Collaboration, which reported the first trapping of neutral antimatter in 2010, and the Berkeley Earth Surface Temperature Study.