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Pulsars are observed to emit bright and spatially extended emission atmulti-TeV energies. Although such "TeV halos" appear to be an approximatelyuniversal feature of middle-aged pulsars, there remains much to be understoodabout these systems. In this paper, we project the ability of the CherenkovTelescope Array (CTA) to measure the properties of TeV halos, focusing on thecase of the nearby Geminga pulsar. We conclude that CTA will be able to provideimportant information about this source, allowing us to discriminate between arange of different models that are currently consistent with all existing data.In particular, such observations will help us to measure the normalization,energy dependence, and spatial dependence of the diffusion coefficient in theregion that surrounds Geminga, as well as the spectrum of the electrons thatare injected from this source.

Unraveling TeV Halos with the Cherenkov Telescope Array