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Transition Edge Sensor for CMB polarization

Abstract: Transition edge sensors (TESs) are now widely used to constrain cosmological parameters and to search for physics beyond the standard model, including inflation and neutrino mass. They are used to search for the signal of primordial gravitational waves in the polarization of the cosmic microwave background (CMB), to survey galaxy clusters at high redshift, and to probe structure evolution through lensing of the CMB. These measurements have been enabled by the sensitivity provided by TESs and by the readout of multi-kilopixel detector arrays by superconducting multiplexer technology. I will discuss the development of the polarimeters for the South Pole Telescope (SPTpol) and Atacama Cosmology Telescope (ACTpol), and highlight the recent detection of lensing B-modes with SPTpol.
Speaker: Hsiao-Mei (Sherry) Cho - NIST Boulder and University of Colorado Boulder
Speaker Bio: I joined National Institute of Standards & Technology (NIST) in Boulder, Colorado in 2007, where I have led the research and development effort for detectors for several astrophysics projects, a stand-off body imaging millimeter-wave system for security, and an ultra-low field magnetic resonance imaging system for medical applications. Prior to NIST, I was a postdoc at University of California at Berkeley and was responsible for the successful development of two cosmology projects, APEX-SZ and SPT-SZ. I received my Ph.D. from University of Houston with the bulk of my doctoral research being conducted under Professor John Clarke at the University of California, Berkeley.
Poster Link: Poster