The BICEP Array telescopes search for primordial B-mode polarization from inflationary gravitational waves. This signal is exceedingly faint, demanding excellent map depth and systematics control. The new BA4-90/150 receiver introduces a wide 80–169 GHz dichroic band, requiring upgrades throughout the optics chain to r...
A. Polish, P. Ade, Z. Ahmed et al.· Astronomical Telescopes + In...· 0 citations
Measurements of the polarization of the cosmic microwave background are critical for modern cosmology as they constrain the physics of the early universe and cosmic inflation. BICEP Array is using a series of small-aperture polarimeters located at the South Pole to measure this signal with a projected σ(r) ≈ 0.001 by 2...
S. Steiger, P. Ade, Z. Ahmed et al.· Astronomical Telescopes + In...· 0 citations
Early observations with the BICEP Array 150 GHz (BA2-150) and 220/270 GHz (BA3-220/270) receivers revealed detector noise equivalent temperatures (NETs) higher than expected, together with substantial detector-to-detector and module-to-module scatter. Noise measurements acquired with multiplexing off and high frequency...
S. Fatigoni, P. Ade, Z. Ahmed et al.· Astronomical Telescopes + In...· 0 citations
BICEP Array (BA) is the current-generation instrument in the BICEP series of small-aperture, on-axis refracting telescopes at the South Pole, designed to constrain the tensor-to-scalar ratio r through degree-scale measurements of B-mode polarization in the cosmic microwave background (CMB). As BA pushes to deeper sensi...
M. Poza, P. Ade, Z. Ahmed et al.· Astronomical Telescopes + In...· 0 citations
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