Looking Forward with TolTEC, A New Multiwavelength Imaging Polarimeter for the LMT

TolTEC is an upcoming multiwavelength imaging polarimeter designed to fill the focal plane of the 50-m diameter Large Millimeter Telescope (LMT). Combined with the LMT, TolTEC will be able to offer high angular resolution (5"-10") simultaneous, polarization-sensitive observations in three wavelengths: 1.1, 1.4, and 2.0 mm. Additionally, TolTEC will feature mapping speeds greater than 2 deg2/mJy2/hr, thus enabling wider surveys of large-scale structure, galaxy evolution, and star formation. These improvements are only possible using over 7000 low-noise, high-responsivity superconducting Lumped Element Kinetic Inductance Detectors (LEKIDs). To utilize three focal planes of detector arrays requires the design and integration of unique, large-scale cryogenic, electronic, and optical systems. In this presentation, I will describe the progress we have made in the design, fabrication, and assembly of TolTEC over the past year. As we plan to see first light at the LMT in Summer 2019, I will also provide an overview and timeline for TolTEC's upcoming science through the lens of its initial four Legacy Surveys.