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A. W. Chao
Researcher at University of Michigan
Publications - 8
Citations - 148
A. W. Chao is an academic researcher from University of Michigan. The author has contributed to research in topics: Betatron & Resonance. The author has an hindex of 8, co-authored 8 publications receiving 147 citations.
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Journal ArticleDOI
Experimental determination of the Hamiltonian for synchrotron motion with rf phase modulation
H. Huang,M. Ball,B. B. Brabson,J. Budnick,D. D. Caussyn,A. W. Chao,J. Collins,V. Derenchuk,S. Dutt,G. East,M. Ellison,D.L. Friesel,B. Hamilton,W.P. Jones,S. Y. Lee,Derun Li,M.G. Minty,S. Nagaitsev,King Yuen Ng,X. Pei,A. Riabko,T. Sloan,Michael Syphers,L. Teng,Y. Wang,Y.T. Yan,P.L. Zhang +26 more
TL;DR: Experimental data revealed island structure in longitudinal phase space in synchrotron motion excited by phase modulation at the third harmonic of the syn chrotron frequency.
Journal ArticleDOI
Experimental studies of nonlinear beam dynamics
D. D. Caussyn,M. Ball,B. B. Brabson,J. Collins,S. A. Curtis,V. Derenchuck,D. DuPlantis,G. East,M. Ellison,Timothy J.P. Ellison,D.L. Friesel,B. Hamilton,W.P. Jones,W. Lamble,S. Y. Lee,Derun Li,M. G. Minty,T. Sloan,G. Xu,A. W. Chao,King Yuen Ng,S. Tepikian +21 more
TL;DR: The nonlinear beam dynamics of transverse betatron oscillations were studied experimentally at the Indiana University Cyclotron Facility cooler ring and the Hamiltonian for nonlinear particle motion near the third- and fourth-integer-resonance conditions has been deduced.
Journal ArticleDOI
Experimental determination of a nonlinear Hamiltonian in a synchrotron.
S. Y. Lee,M. Ball,B. B. Brabson,D. D. Caussyn,J. Collins,S. A. Curtis,V. Derenchuck,D. DuPlantis,G. East,M. Ellison,Timothy J.P. Ellison,D.L. Friesel,B. Hamilton,W.P. Jones,W. Lamble,Derun Li,M. G. Minty,P. Schwandt,T. Sloan,G. Xu,A. W. Chao,S. Tepikian,King Yuen Ng +22 more
TL;DR: The nonlinear beam dynamics of transverse betatron oscillators were studied experimentally at the Indiana University Cyclotron Facility Cooler Ring and the Hamiltonian of particle motion near a resonance condition was deduced.
Journal ArticleDOI
Experimental measurement of resonance islands induced by rf voltage modulation.
Derun Li,M. Ball,B. B. Brabson,J. Budnick,D. D. Caussyn,A. W. Chao,G. East,M. Ellison,D.L. Friesel,B. Hamilton,H. Huang,W.P. Jones,S. Y. Lee,M.G. Minty,S. Nagaitsev,King Yuen Ng,X. Pei,T. Sloan,Michael Syphers,L. Teng,Y. Wang,Y.T. Yan,P.L. Zhang +22 more
TL;DR: The measured phase amplitudes of the centers of these resonance islands were found to agree well with theory, and Beam particles, in the presence of electron cooling, were observed to damp to the basins of resonance islands.
Journal ArticleDOI
Effects of the synchro-betatron coupling induced by dipole-field modulation.
Y. Wang,M. Ball,B. B. Brabson,J. Budnick,D. D. Caussyn,A. W. Chao,J. Collins,V. Derenchuk,S. Dutt,G. East,M. Ellison,D.L. Friesel,B. Hamilton,H. Huang,W.P. Jones,S. Y. Lee,Derun Li,J.Y. Liu,M.G. Minty,King Yuen Ng,X. Pei,A. Riabko,T. Sloan,Michael Syphers,L. Teng,Y.T. Yan,P.L. Zhang +26 more
TL;DR: The synchro-betatron coupling induced by modulating a transverse dipole field at a frequency close to the synchrotron frequency was studied experimentally and the combination of the electron cooling and transverse-field modulation on the synChrotron oscillation is equivalent to a dissipative parametric resonant system.