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The LHCb recorded $\sim$ 210 $\mu b^{-1}$ integrated luminosity of PbPbcollisions at $\sqrt{s_{NN}}$ = 5.02 TeV in 2018. With an increase of theluminosity by a factor of 20 compared to the previous 2015 PbPb dataset,precise measurements on photo-produced charmonia in ultra-peripheral collisionsare now possible. Moreover, the great momentum resolution of the detectorallows photo-produced $J/\psi$ in collisions with a nuclear overlap to bestudied. This new type of probe is sensitive to the geometry of the collisionsbut also to the electromagnetic field of the Pb nuclei. In this contribution,we present the latest results on $J/\psi$ photo-production measured by LHCb inperipheral and ultra-peripheral PbPb collisions.

Charmonia photo-production in ultra-peripheral and peripheral PbPb collisions with LHCb