The Zwicky Transient Facility (ZTF) is the next generation of the optical, time-domain survey iPTF and will be commissioned in 2017. ZTF has a 47 square degree field of view camera composed of sixteen 6144x6160 pixel CCDs. ZTF will attain a very precise flat focus plane by positioning the CCDs carefully in the lab, installing the camera on the Palomar 48-inch telescope, testing the CCD height and tilt to within 10 microns, and bringing the camera back to Caltech to perform a final adjustment following the tests recommendations. I have developed this test to accurately map each of the CCDs height and tilt, and have tested it on the current iPTF CCD array.
Arguably the largest gap in our knowledge of stellar nucleosynthesis is the origin of elements heavier than iron—specifically those elements created by the rapid neutron-capture process (r-process). The chemical enrichment of galaxies—especially dwarf galaxies—helps distinguish between the proposed origins based on the continual build-up of r-process elements. I have measured the r-process element barium with Keck/DEIMOS medium-resolution spectroscopy. This work results in the largest sample of barium abundances (almost 300 stars) in dwarf galaxies ever assembled. By analyzing the chemical abundance trends, I have found that a large contribution of barium needs to occur at timescales similar to Type Ia supernovae in order to recreate our observed abundances, namely the flat or slightly rising trend of [Ba/Fe] vs. [Fe/H]. On going work using a galactic chemical evolution model concludes that neutron star mergers are the main contribution of r-process enrichment in dwarf galaxies.