Wilson Prize Recipient (2022): The Evolution of the Fermilab Accelerator Complex*

With the commissioning of the Fermilab Tevatron proton-antiproton collider in the mid-1980s, the stage was set for operations at the energy frontier for the next several decades. Yet, two things were clear even then:  the performance demands on the Tevatron would grow dramatically over the years; and the ultimate fate of the Tevatron collider would most likely be obsolescence. This talk will describe how the Fermilab accelerator complex evolved from the 1990s onward in response to the needs of the collider program, while establishing a post-Tevatron capability. Particular emphasis will be placed on the roles of flexibility, opportunity, and risk in developing and constructing particle accelerators with long-term, evolving, missions.