Wulf Kunkel, a physicist who joined Berkeley Lab in 1956 and retired in 1991, passed away on Sept. 3. Kunkel served as the lead of the Fusion Research Group at the Lab from 1971 to 1991. After his retirement, he continued as an affiliate of the Accelerator and Fusion Research Division. He was also a professor at UC Berkeley, where he received his B.A. and Ph.D. degrees. Kunkel’s research focused on astrophysics, basic aspects of plasma physics, controlled nuclear fusion power, developing novel powerful deuterium injectors for heating, ionization phenomena in gases, physics, plasma in the large magnetic confinement fusion experiments, and space sciences.