Fabrication of a Monolithic 5-Meter Aluminum Reflector for Millimeter-Wavelength Observations of the Cosmic Microwave Background

astro-ph.IM

/ Authors

Tyler Natoli, Bradford Benson, John Carlstrom, Eric Chauvin, Bruno Clavel, Nick Emerson, Patricio Gallardo, Mike Niemack, Steve Padin, Klaus Schwab

and 2 more authors

Lutz Stenvers, Jeff Zivick

/ Abstract

We have demonstrated the fabrication of a monolithic, 5-meter diameter, aluminum reflector with 17.4 $μ$m RMS surface error. The reflector was designed to avoid the problem of pickup due to scattering from panel gaps in a large, millimeter-wavelength telescope that will be used for measurements on the cosmic microwave background.