The $^3$He-$^3$H Charge Radius Difference

The upcoming E12-14-009 experiment at Jefferson Lab will determine the charge radius difference between $^3$He and $^3$H from elastic electron scattering. This measurement will utilize a low-activity tritium target that is available for a limited time at Jefferson Lab. We will measure the ratio of the $^3$He and $^3$H electric form factors at 0.05--0.09 GeV$^2$ using a high-resolution spectrometer in Hall A. The relative charge radii will be extracted from the data with a statistical(systematic) uncertainty \textless 0.5(2.5)\%. These data will reduce the uncertainty in the charge radius difference from $\sim$0.1 fm to $\sim$0.03 fm. The results will provide a direct comparison to recent calculations of the charge radii. Additionally, the individual proton and neutron radii can be determined and compared to ab initio calculations of the three-body nuclei.