@article{THESIS,
      recid = {13832},
      author = {Dibert, Karia},
      title = {Science Forecasting and Detector Development for a  High-Frequency South Pole Telescope Camera},
      publisher = {University of Chicago},
      school = {Ph.D.},
      address = {2024-12},
      number = {THESIS},
      abstract = {I present a collection of forecasting, analysis, and  instrumentation work related to the science cases and  detector development for an upcoming camera for the  10-meter South Pole Telescope (SPT), called SPT-3G+.  SPT-3G+ is a high-frequency, high-sensitivity camera  designed to observe the cosmic microwave background (CMB)  at 220, 285, and 345 GHz, targeting a variety of  astrophysical and cosmological science cases. I first  present forecasts of the expected sensitivity of SPT-3G+ to  the recombination-era Rayleigh scattering of the CMB, a  signal which probes the expansion and ionization history of  the universe just after recombination, and whose first  detection is sought by SPT-3G+. I find that, in combination  with SPT-3G and Planck data, the expected detection  significance is about 1.6-sigma, and that the cosmic  infrared background, or CIB, is the major foreground  inhibiting a higher detection significance. I next present  an attempt to characterize the CIB using data from the  2019-2020 SPT-3G observing seasons, employing an existing  physically-motivated model that relates CIB emission to an  underlying star-formation rate. Instead of the CIB  autospectrum, I fit the CIB x CMB lensing spectrum, which  is less susceptible to systematic bias from contaminants  such as galactic dust. Finally I present my work on the  design, fabrication, and laboratory characterization of  feedhorn-coupled direct absorbing 220 GHz microwave kinetic  inductance detectors (MKIDs) for SPT-3G+. The detectors  perform well from both a microwave and an optical  perspective. Resonances are of the intended shape and  quality, and are located within the intended microwave  readout bandwidth. The detectors show background-dominated  performance under a representative optical load, indicating  that they possess the required sensitivity for use on the  SPT-3G+ focal plane. They show an optical efficiency of  approximately 70%. I have begun scaling up to triangular  submodule fabrication, and will discuss future plans for  the optical testing of deployment-scale submodules.},
      url = {http://knowledge.uchicago.edu/record/13832},
      doi = {https://doi.org/10.6082/uchicago.13832},
}