As of 2012, and put in a journal in 2013, Dyson came up with criteria as to the Gertsenshtein process in photon-graviton coupling, with criteria as to the likelihood as to if the Gertsenshtein process actually can occur. This methodology is applied to a small spatial geometry as to Tokamak’s with a 100% probability of Gertsenshtein coupling of gravitons and photons, if there is a magnetic field of magnitude 10 to the 9th power, Gauss. This coupled with a GW and graviton frequency of order 10 to the 9th power, Hertz. The high GW frequency is justified in a prior analysis done by the author, and the magnetic field of 10 to the 9th power Gauss is enough to insure that within a GW detector that there is the likelihood of the Gertsenshtein process occurring. This threshold magnetic field strength is tied into a probability of measurement of the Gertsenshtein process, allowing for GW measurements as a signature, in the Tokamak GW experiment. As a first finding, should these criteria be verified, the next focus will be on beginning to determine if higher dimensional versions of gravity have experimental signature, which will be the focus of the next paper. That and trying to determine if a graviton could have a small mass. The GW signatures are then finally discussed in terms of early space-time geometry alternations which is in terms of GW signatures if a refinement of the Gertsenshtein process is proved and finalized after the Tokamak GW experiment.