BigBOSS: enabling widefield cosmology on the Mayall Telescope

BigBOSS is a proposed DOE-NSF Stage IV ground-based dark energy experiment designed to study baryon acoustic oscillations (BAO) and the growth of large scale structure with a 14,000 square degree survey of the redshifts of galaxies and quasi-stellar objects. The project involves modification of existing facilities operated by the National Optical Astronomy Observatory (NOAO). Design and systems engineering of a preliminary 3 degree field of view refractive corrector, atmospheric dispersion corrector (ADC), and 5000 actuator fiber positioning system are presented.