The next-generation receiver, scheduled for first light in 2015, will use a new dichroic pixel architecture with bands at 95 and 150 GHz. The focal plane will be larger in area and pixel count than POLARBEAR-1, with 1897 pixels (7588 bolometers). The receiver shown to the right currently under construction.


The Simons Array is a funded expansion of POLARBEAR to three multi-frequency telescopes based on the POLARBEAR-2 design at the Cerro Toco site. The sensitivity and multi-frequency observation will allow us to precisely characterize the inflationary and lensing B-mode signals. From the lensing signal we will be able to measure the sum of the neutrino masses with an uncertainty of 16 meV (when combined with BAO data), and constrain the equation of state of dark energy. We will also be able to remove the lensing, treating it as a "foreground contaminant" to measure the primordial inflationary B-mode signal across a wide multipole range.