12/12: 2nd Year Project: Natalie DeNigris

LGRT 533
LGRT 533 Lecture Area

Open to everyone

postponed from 12/2 to 12/12 due to snow day

Title: The Pre-Shipment Status of TolTEC: A New Multiwavelength Imaging Polarimeter for the LMT

Abstract: TolTEC is an upcoming millimeter-wave imaging polarimeter designed to fill the focal plane of the 50-m diameter Large Millimeter Telescope (LMT). Combined with the LMT, TolTEC will offer high angular resolution (5”-10”) for simultaneous, polarization-sensitive observations in three wavelength bands: 1.1, 1.4, and 2.0 mm. Additionally, TolTEC will feature mapping speeds greater than 2 deg^2/mJy^2/hr enabling wider surveys of large-scale structure, galaxy evolution, and star formation than is currently possible at these resolutions. We intend to commission TolTEC at the LMT in Winter 2020. In this talk, I will provide an update on TolTEC’s in-lab testing occurring at UMass Amherst in preparation for installation at the LMT. The improvements that TolTEC will offer are only possible through the integration of three separate focal planes totalling approximately 7000 low-noise, high-responsivity superconducting Lumped Element Kinetic Inductance Detectors (LEKIDs). As of November 2019, we have integrated and tested two of the three detector arrays (1.1 mm and 2.0 mm) to determine their responsivity and, where possible, their bandpasses. I will conclude my talk with some of the novel galaxy cluster physics I hope to study with TolTEC using the Sunyaev-Zel’dovich Effect.