  The Integrable Optics Test Accelerator (IOTA) is a storage ring for advanced
beam physics research currently being built and commissioned at Fermilab. It
will operate with protons and electrons using injectors with momenta of 70 and
150 MeV/c, respectively. The research program includes the study of nonlinear
focusing integrable optical beam lattices based on special magnets and electron
lenses, beam dynamics of space-charge effects and their compensation, optical
stochastic cooling, and several other experiments. In this article, we present
the design and main parameters of the facility, outline progress to date and
provide the timeline of the construction, commissioning and research. The
physical principles, design, and hardware implementation plans for the major
IOTA experiments are also discussed.

Accelerator Physics