Gravity Group Lunch Seminar, Heather McCarrick (Columbia University), "KIDs for CMB Polarimetry"

Fri, Oct 13, 2017, 12:00 pm

I will talk about the development of kinetic inductance detectors (KIDs) optimized for cosmic microwave background (CMB) polarization studies. We have designed, fabricated, and tested arrays of dual-polarization lumped-element KIDs (LEKIDs). The arrays are mounted in 64-element modules where each element contains a conical horn and two resonators sensitive to orthogonal polarizations. I will discuss the constraints and motivations behind the detector design and array architecture. I will show measured results from these arrays including responsivity, noise, and polarization selectivity. I will outline our work towards integrating a LEKID array comprised of four dual-polarization LEKID modules into the Atacama B-mode Search (ABS) cryostat. This ABS project will allow us to demonstrate LEKIDs in a CMB polarimeter with on-sky measurements and test a multiplexing factor of 512. Finally, I will talk about both our multi-chroic KIDs, which are based on the Advanced ACTPol orthomode transducer design, and low-frequency (<90 GHz) KID development.

Salads, sandwiches, and wraps are catered by D'Angelo Italian Market.
Bottled water will be provided.

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102 Jadwin Hall