Center for Advanced Studies of Accelerators
CASA Staff
Rui Li 
Contact:

Center for Advanced Studies of Accelerators
Thomas Jefferson National Accelerator Facility
12050 Jefferson Avenue, Ste. 704
Newport News, VA 23606
7572697096 (phone)
7572695024 (fax)
lir@jlab.org
Education:
 M.S./Ph.D., Physics, University of Maryland, 1990
 B.A., Physics, Peking University, 1984
Career:
 Staff Scientist, Center for Advanced Studies of Accelerators, Jefferson Lab, 1990  Present
 Adjunct Professor, Department of Physics, Virginia Tech, 2013  Present
Prizes and Awards:
 Outstanding Referee Award for the Journals of American Physical Society, 2010
Mentorship:
 PhD Thesis Advisor for ChengYing Tsai (Virginia Tech, 2013  2017) Investigation of Microbunching Instabilities in Modern Recirculating Accelerators"
Research Highlights:
 Analytical, numerical and experimental studies of collective effects and their interplay on the trasnport of highbrightness electron beams in linac drivers of FELs (such as the JLAB FEL) and recirculation accelerators or ERLs
 Frequencydomain MaxwellVlasov analysis of microbunching instability due to interplay of coherent synchrtron radiation (CSR) and longitudinal space charge (LSC) in magnetic chicanes or recirculating arcs
 Timedomain particle tracking of CSR and space charge effects, and their impact on beam phase space degradation
 Benchmark of analysis with simulations for longitudinal and transverse emittance growth and for microbunching instability
 Effects of CSR and space charge induced microbunching on the beam dynamics for beam transport in magnetic bending systems including bunch compression chicanes and recirculating arcs
 Effect of resistive wall heating for highintensity beams
 Enhancement of CSR SelfInteraction due to local charge concentration
 Analysis and simulation of 2D CSR effects for an energy chirped bunch
 Developing fully selfconsistent simulation of the 2D CSR effect based on first principle
 Investigation of the cancelation effect of the Talman’s force and noninertial space charge force on the transverse beam dynamics for a bunch on a curved orbit
 Theoretical study of the effects of potential energy spread on the beam dynamics as a remnant of cancellation of the CSR effects
 Experimental measurement of CSR and LSC effects on beam phase space and benchmark with numerical modeling
 Phase space manipulation for highbrightness charged beams, including transport of magnetized beams
 Analytical, numbercial and experimental studies of collective effects of high intensity charged electron or hadron beams in accelerators, in particular, for the JLEIC design.
 Impedance budget studies for the JLEIC design
 Longitudinal single and multi bunch instabilities from wakefield or impedances, effects of electron cloud and ion trapping, and scattering effects
 Analysis of beambeam kink instabilities for a linacring collider
 Numerical modeling Beambeam effects in linacring and ringring colliders
 MaxwellVlasov analysis for the study of instabilities in beam physics
 Selfconsistent simulation of collective particle interaction based on first principle
Selected Recent Publications:
 "Curvatureinduced bunch selfinteraction for an energychirped bunch in magnetic bends”
R. Li
Phys. Rev. ST Accel. Beams, 11, 024401 (2008).
 “Sensitivity of the CSR selfinteraction to the local longitudinal charge concentration of an electron bunch”
R. Li
Nucl. Instr. and Meth. A 475, p. 498 (2001).
 “Sustained Kilowatt Lasing in a FreeElectron Laser with SameCell Energy Recovery”
G.R. Neil, C.L. Bohn, S.V. Benson, G. Biallas, D. Douglas, H.F. Dylla, R. Evans, J. Fugitt, A. Grippo, J. Gubeli, R. Hill, K. Jordan, R. Li, L. Merminga, P. Piot, J. Preble, M. Shinn, T. Siggins, R. Walker, and B. Yunn
Physical Review Letters, 84, 662 (2000).
 “Emittance growth and energy loss due to coherent synchrotron radiation in a bunch compressor urvatureinduced bunch”
H.H. Braun, R. Corsini, L. Groening, F. Zhou, A. Kabel, T. O.Raubenheimer, R. Li, T. Limberg
Phys. Rev. ST Accel. Beams 3, 124402 (2000).
Seminars and Conference Presentations:
 "Updates on the 2D CSR Effects", R. Li, 6th Microbunching Instability Workshop, Trieste (2014)
 "Effects of Potential Energy Spread on Particle Dynamics in Magnetic Bending Systems", R. Li, Proc. 36th Int'l. Free Electron Laser Conference, Basal (2014)
 "The Early Studies of BeamBeam Effects in a LinacRing Collider", EIC14, Newport News (2014)
 "Overview of Theory and Simulation of Microbunching Instability", 5th Microbunching Instability Workshop, Pohang (2013)
 "Radial Eigenmodes for a Toroidal Waveguide with Rectangular Cross Section", R. Li, Proc. 2012 Int'l. Particle Accelerator Conference, New Orleans (2012)
 "Twodimensional Effects on the CSR Interaction Forces for an Energy Chirped Bunch", the CSR Workshop, Canadian Light Source (2010)
 "New ParticleInCell Code for Numerical Simulation of Coherent Synchrotron Radiation", B. Terzic and R. Li, Proc. 2010 Int'l. Particle Accelerator Conference, Kyoto (2010)
 "Discussions on the cancellation effect on a circular orbit", R. Li, Ya.S. Derbenev, Proc. 2005 Particle Accelerator Conference, Knoxville (2005)
 Cancellation Effects in CSR Induced Bunch Transverse Dynamics in Bends", R. Li, Proc. 2002 European Particle Accelerator Conference, Paris (2002)
Complete list of Publications
Professional Activities:
 DOE SBIR.STTR Review Panel
 Doctoral Research Award Committee, Division of Physics of Beams in American, American Physical Society Chair (2017) ViceChair (2016) Member (2007  2009)
 Institutional PI for the Community Petascale Project for Accelerator Science and Simulation (COMPASS), a multilab SciDac project of DOE (2007  2012)
 Scientific Program Committee, 6th Microbunching Instability Workshop, Trieste, Italy (2014)
 Scientific Program Committee, High Brightness Hadron Beam Workshop, Nashville, Tennessee (2008)
 Member of the Scientific Program Committee for several International workshops
 Mentor for young staff scientists, PhD students, undergraduate and high school students