Nuclear charge radii, a quantity crucial in many nuclear physics studies, can be extracted from H- and Li-like electronic transitions, even in heavy ions, when combined with atomic theory * **. The latter has progressed to permit such calculations from transitions in Na-like ions *** ****. Charge breeding to Na-like charge state eases experimental requirements. To this end, at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN) facility, we are developing a high-efficiency, flat-field grazing incidence extreme-ultraviolet (EUV) spectrometer, for the measurement of absolute nuclear charge radii of short-lived nuclides. It will be installed to the Electron Beam Ion Trap (EBIT), which is capable of electron beam energies up to 66 keV. The spectrometer is designed to optimize transmission efficiency in the EUV regime. The ray-tracing simulations done in Shadow3 ***** will be presented. The first measurement candidates are 211Fr and a suitable spin-0 isotope of Ra, which are relevant for atomic parity violation (APV) experiments and searches for time-reversal violating permanent electric dipole moments (EDM).

Electron Beam Ion Traps (EBIT) can be used to create highly charged ions (HCI) of almost any charged state by simply tuning the energy of the electron beam. Atomic spectroscopy with EBITs, therefore, offers a great platform to identify previously unmeasured transitions, understand atomic processes in laboratory and astrophysical plasmas, and explore the structure of unique electron configurations to benchmark modern atomic theories. An interesting case of the latter is the fine structure 3d9 2D3/2 - 2D5/2 transitions in Co-like ions with suppressed correlations and enhanced relativistic and quantum electrodynamics (QED) effects *, **. These transitions, also labeled as "Layzer quenched" transitions, can be used to accurately test current methods to compute Breit and QED effects. Here, we present direct measurements of the 3d9 2D3/2 - 2D5/2 fine structure of Co-like Yb, Re, Os, and Ir using the National Institute of Standards and Technology (NIST) EBIT facility. Comparisons with the existing theories ***, **** are made in an effort to understand the Briet interaction and the self-energy contribution to QED.