The Compact Accelerator System for Performing Astrophysical Research (CASPAR), is a National Science Foundation (NSF) funded underground accelerator laboratory housed in the Sanford Underground Research Facitily (SURF), located in the Black Hills of South Dakota.

CASPAR resides 4850 feet underground and is dedicated to the study of nuclear reactions fueling stellar environments and elemental production. CASPAR is the only deep underground accelerator laboratory in the U.S. A strong focus of the laboratory is the education and training of the next generation of nuclear physicists through strong graduate and undergraduate student involvement.

CASPAR physicist in the Sandford Underground Research Facility (SURF)

What is CASPAR?

Find out more about CASPAR's mission

Accelerator ion source

CASPAR Research

Learn about CASPAR's research

Working on the accelerator

CASPAR Facility

Explore the equipment and set-up of CASPAR