Center for Advanced Studies of Accelerators

CASA Staff

Rui Li
Senior Staff Scientist

Contact:

lir@jlab.org

Education:

Career:

Senior Staff Scientist, Center for Advanced Studies of Accelerators, Jefferson Lab, 1990 - Present
Adjunct Professor, Department of Physics, Virginia Tech, 2013 - 2017

Prizes and Awards:

Mentorship:

Research Highlights:

Analytical, numerical and experimental studies of collective effects and their interplay on the trasnport of high-brightness electron beams in linac drivers of FELs (such as the JLAB FEL) and recirculation accelerators or ERLs

Frequency-domain Maxwell-Vlasov analysis of microbunching instability due to interplay of coherent synchrtron radiation (CSR) and longitudinal space charge (LSC) in magnetic chicanes or recirculating arcs
Time-domain 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 high-intensity beams
Enhancement of CSR Self-Interaction due to local charge concentration
Analysis and simulation of 2D CSR effects for an energy chirped bunch
Developing fully self-consistent 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 high-brightness charged beams, including transport of magnetized beams

Selected Recent Publications:

"Curvature-induced bunch self-interaction for an energy-chirped bunch in magnetic bends”
R. Li
Phys. Rev. ST Accel. Beams, 11, 024401 (2008).
“Sensitivity of the CSR self-interaction 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 Free-Electron Laser with Same-Cell 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 urvature-induced 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 Beam-Beam Effects in a Linac-Ring 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)

"Two-dimensional Effects on the CSR Interaction Forces for an Energy Chirped Bunch", the CSR Workshop, Canadian Light Source (2010)

"New Particle-In-Cell 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) Vice-Chair (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