Apparatus, systems, and method utilize a fluidized bed of solid particles to collect concentrated solar thermal energy in a compact receiver. Once energy is absorbed, these very hot particles are stored in a containment vessel. Heat is transferred to an air or other fluid stream and the stream is directed to a power generator or other unit.
STATEMENT AS TO RIGHTS TO APPLICATIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT
 The United States Government has rights in this application pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC for the operation of Lawrence Livermore National Laboratory.