Fermilab engineers Mohamed Hassan, left, and Donato Passarelli stand near an accelerator cavity and the patented balloons used to tune, or reshape, the cavity from the inside. Photo: Reidar Hahn
August 14, 2019
Fermilab engineers Mohamed Hassan, left, and Donato Passarelli stand near an accelerator cavity and the patented balloons used to tune, or reshape, the cavity from the inside. Photo: Reidar Hahn