The inside view of a custom-built machine that makes atomically precise lenses that focus x-ray beams to within a single nanometer. Inside this chamber, substrates travel along that central track and collect plasma-borne particles that form the lenses (a technique called sputter deposition). Once the completed materials are etched down to the proper size, they will be precisely designed to work with Brookhaven's forthcoming National Synchrotron Light Source II. When completed, NSLS-II will be the world's leading storage-ring-based synchrotron light source. Scheduled for completion in 2015, NSLS-II will allow the characterization of the atomic and electronic structure, chemical composition, and magnetic properties of materials in a wide range of temperatures and environments. Its unique aspects will help researchers explore solutions to the grand energy challenges faced by the nation, and open up new regimes of scientific discovery. A synchrotron is a particular type of cyclic particle accelerator (atom smasher), descended from the cyclotron, in which the guiding magnetic field (bending the particles into a closed path) is time-dependent, being synchronized to a particle beam of increasing kinetic energy.