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Antenna-coupled TES bolometers for the Keck Array, Spider, and Polar-1
R. O'Brient, P. A. R. Ade, Z. Ahmed +50
Between the BICEP2 and Keck Array experiments, we have deployed over 1500 dual polarized antenna coupled bolometers to map the Cosmic Microwave Background's polarization. We have b…
Optimization and sensitivity of the Keck Array
S. Kernasovskiy, P. A. R. Ade, R. W. Aikin +41
The Keck Array (SPUD) began observing the cosmic microwave background's polarization in the winter of 2011 at the South Pole. The Keck Array follows the success of the predecessor…
BICEP2 and Keck Array operational overview and status of observations
R. W. Ogburn, P. A. R. Ade, R. W. Aikin +50
The BICEP2 and Keck Array experiments are designed to measure the polarization of the cosmic microwave background (CMB) on angular scales of 2-4 degrees (l=50-100). This is the reg…
Code-division multiplexing for x-ray microcalorimeters
G. M. Stiehl, W. B. Doriese, J. W. Fowler +7
We demonstrate the code-division multiplexed (CDM) readout of eight transition-edge sensor microcalorimeters. The energy resolution is 3.0 eV (full width at half-maximum) or better…