LUX was the first dark matter experiment to use a $^{83textrm{m}}$Kr calibration source. In this paper we describe the source preparation and injection. We also present several $^{83textrm{m}}$Kr calibration applications in the context of the 2013 LUX exposure, including the measurement of temporal and spatial variation in scintillation and charge signal amplitudes, and several methods to understand the electric field within the time projection chamber.
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