Yi Wu, a PhD student at the EPFL Laboratory of Particle Accelerator Physics, has been selected to present her research at the International Particle Accelerator Conference 2026 (https://indico.jacow.org/event/95/contributions/12371/editing/slides/46453/125260/WEO1T03_talk.pdf) and has earned the Best Student Poster Award for her outstanding contribution. Her doctoral work is fully supported by the CHART Polarization Project, which is strengthening European expertise in polarized beam dynamics and precision energy measurement—fields where CHART has been actively filling long‑standing knowledge gaps.

Yi’s research introduces Near Resonance Polarization Modulation (NRPM), a breakthrough technique that achieves unprecedented accuracy in determining beam energy in storage rings. By coherently driving spin motion with a constant‑frequency AC dipole, NRPM enables exceptionally precise and robust extraction of the spin tune. Demonstrated on the FCC‑ee Z‑pole lattice, the method already surpasses established approaches such as resonant depolarization and free spin precession. Through CHART, Yi has also contributed to the first full simulations of resonant depolarization for FCC‑ee, enabling essential studies and tools for future precision‑physics programs. 

The impact of NRPM extends far beyond FCC‑ee. Its underlying principles are broadly applicable to modern synchrotron facilities, opening the door to a new generation of high‑precision energy calibration methods across the accelerator community. Yi is now advancing toward experimental validation of NRPM, a crucial step toward deploying this technique in operational machines.

Her achievements embody CHART’s mission: driving transformative accelerator technologies and empowering the next generation of scientific leaders.