Enhanced dynamically assisted pair production in frequency chirped spatially inhomogeneous electric fields is studied using the Dirac-Heisenberg-Wigner formalism. The effects of the chirp parameter on the reduced momentum spectrum and the total particle yield are investigated in detail for the single field or the dynamically assisted combined fields at various spatial scales. For the single high frequency field and the combined fields, the interference effect of momentum spectrum becomes more and more remarkable with the increasing chirp, meanwhile, in the chirped dynamically assisted case, the reduced total yield is enhanced significantly when chirping of two fields are present. Specifically, in the assisted case, the reduced particle number is increased by more than one order of magnitude at the small spatial scale, while it is enhanced about two times at the large spatial scale. We also obtain some optimal chirp and spatial scale parameters for the total yield and the enhancement factor for various scenarios.
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