Cosmic Visions Dark Energy: Small Projects Portfolio
  Understanding cosmic acceleration is one of the key science drivers for
astrophysics and high-energy physics in the coming decade (2014 P5 Report).
With the Large Synoptic Survey Telescope (LSST) and the Dark Energy
Spectroscopic Instrument (DESI) and other new facilities beginning operations
soon, we are entering an exciting phase during which we expect an order of
magnitude improvement in constraints on dark energy and the physics of the
accelerating Universe. This is a key moment for a matching Small Projects
portfolio that can (1) greatly enhance the science reach of these flagship
projects, (2) have immediate scientific impact, and (3) lay the groundwork for
the next stages of the Cosmic Frontier Dark Energy program. In this White
Paper, we outline a balanced portfolio that can accomplish these goals through
a combination of observational, experimental, and theory and simulation
efforts.
