Prof. Wu is interested in nonlinear dynamics of charged particle beams, coherent radiation sources, and the development of novel accelerators and light sources. One of his research focuses is to study the charged particle nonlinear dynamics using the modern techniques such as Lie Algebra, Differential Algebra, and Frequency Analysis. This direction of research will significantly further the understanding of the nonlinear phenomena in light source storage rings and collider rings, improve their performance, and provide guidance for developing next generation storage rings. The second area of research is to study and develop coherent radiation sources such as broad-band far infrared radiation from dipole magnets and coherent mm-wave radiation from a free-electron-laser (FEL). With this direction of research, he hopes to study the beam stability issues, in particular, the single bunch instabilities in the storage ring, develop diagnostics to monitor and improve the stability of the light source beams, and eventually develop novel means to overcome instabilities. These areas of research will provide foundations for developing a femto-second hard x-ray Compton back scattering radiation source driven by a mm-wave FEL - a next generation light source.
Li, J, Wu, YK, and Sun, C. "Improved long radius of curvature measurement system for FEL mirrors." Proceedings of the IEEE Particle Accelerator Conference 2005 (2005): 1787-1789. Full Text
Steier, C, Robin, D, Decking, W, Laskar, J, Nadolski, L, and Wu, Y. "Measuring and understanding the momentum aperture in a storage ring." Proceedings of the IEEE Particle Accelerator Conference 2005 (2005): 645-649. Full Text
Hartmant, SM, Mikhailov, SF, and Wu, YK. "A control system for the duke booster synchrotron." Proceedings of the IEEE Particle Accelerator Conference 2005 (2005): 3792-3794. Full Text
Wu, YK, Li, J, and Wu, J. "Observations and measurements of anomalous hollow electron beams in the duke storage ring." Proceedings of the IEEE Particle Accelerator Conference 2005 (2005): 3082-3084. Full Text
Kurkin, G, Pinaev, I, Hartman, S, Mikhailov, S, and Wu, Y. "A new timing system for the Duke booster and storage ring." Proceedings of the IEEE Particle Accelerator Conference 2005 (2005): 3159-3160. Full Text
Wu, YK, Mikhailov, S, Li, J, Popov, V, Vinokurov, NA, Gavrilov, NG, Shevchenko, OA, Vobly, PD, and Kulipanov, GN. "First lasingand initial operation ofa circularly polarized optical klystron ok-5 felandavariably polarized distributed optical klystron DOK-1 FEL at DUKE." Proceedings of the 27th International Free Electron Laser Conference, FEL 2005 (2005): 407-410.
Feng, J, Forest, E, MacDowell, AA, Marcus, M, Padmore, H, Raoux, S, Robin, D, Scholl, A, Schlueter, R, Schmid, P, Stöhr, J, Wan, W, Wei, DH, and Wu, Y. "An x-ray photoemission electron microscope using an electron mirror aberration corrector for the study of complex materials." Journal of Physics Condensed Matter 17.16 (2005): S1339-S1350. Full Text
Schmid, P, Feng, J, Padmore, H, Robin, D, Rose, H, Schlueter, R, Wan, W, Forest, É, and Wu, Y. "Correction and alignment strategies for the beam separator of the photoemission electron microscope 3 (PEEM3)." Review of Scientific Instruments 76.2 (2005): 023302-1-023302-14-. Full Text
Tonchev, AP, Boswell, M, Howell, CR, Karwowski, HJ, Kelley, JH, Tornow, W, and Wu, YK. "The high intensity γ-ray source (HIγS) and recent results." Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 241.1-4 (2005): 170-175. Full Text
Fransen, C, Pietralla, N, Tonchev, AP, Ahmed, MW, Chen, J, Feldman, G, Kneissl, U, Li, J, Litvinenko, VN, Perdue, B, Pinayev, IV, Pitz, HH, Prior, R, Sabourov, K, Spraker, M, Tornow, W, Weller, HR, Werner, V, Wu, YK, and Yates, SW. "Parity assignments to strong dipole excitations of and." Physical Review C 70.4 (October 2004). Full Text