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, TC, Pietralla, N, Tonchev, AP, Ahmed, MW, Ahn, T, Angell, C, Blackston, MA, Costin, A, Keeter, KJ, Li, J, Lisetskiy, A, Mikhailov, S, Parpottas, Y, Perdue, BA, Rainovski, G, Tornow, W, Weller, HR, and Wu, YK. "First evidence for spin-flip strength in." Physical Review C 73.5 (May 2006). Full Text
Werner, V, Pietralla, N, Von Brentano, P, Kneissl, U, Pitz, HH, Tonchev, A, Ahmed, MW, Fransen, C, Von Garrel, H, Kohstall, C, Li, J, Linnemann, A, Müller, S, Pinayev, IV, Savran, D, Scheck, M, Stedile, F, Tornow, W, Walter, S, Weller, HR, and Wu, YK. "New findings for mixed-symmetry states." AIP Conference Proceedings 819 (March 13, 2006): 340-344. Full Text
Tonchev, AP, Boswell, M, Howell, CR, Karwowski, HJ, Kelley, JH, Tornow, W, and Wu, YK. "The high intensity gamma-ray source (HI gamma S) and recent results." NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 241.1-4 (December 2005): 170-175. Full Text
Wu, YK, Li, J, and Wu, J. "Anomalous hollow electron beams in a storage ring." Phys Rev Lett 94.13 (April 8, 2005): 134802-. Full Text
Savran, D, Müller, S, Zilges, A, Babilon, M, Ahmed, MW, Kelley, JH, Tonchev, A, Tornow, W, Weller, HR, Pietralla, N, Li, J, Pinayev, IV, and Wu, YK. "Parity assignments in using polarized photons and the K quantum number in rare earth nuclei." Physical Review C 71.3 (March 2005). Full Text Open Access Copy
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
Tornow, W, Esterline, JH, Howell, CR, Karwowski, HJ, Kelley, JH, Tonchev, AP, Li, J, Mikhailov, SF, Pinayev, IV, Wu, YK, Weisel, GJ, and Witała, H. "Photon analyzing power for the three-body breakup of 3He at Eγ = 15.0 MeV." AIP Conference Proceedings 768 (2005): 138-140. Full Text