Rami A. Kishek Research Professor Institute for Research in Electronics & Applied Physics Electrical & Computer Engineering ramiakumd.edu Ph.: (301) 405-5012 FAX: (301) 314-9437 Biography What I Do Publications Courses Taught Schedule

Rami A. Kishek, Research Professor B i o g r a p h y

B.S.E. in Electrical Engineering (1993), M.S.E. in Nuclear Engineering (1995), and Ph.D. in Nuclear Engineering (1997), from the University of Michigan, Ann Arbor, MI. After obtaining his Ph.D., Professor Kishek joined the Institute for Research in Electronics & Applied Physics at the University of Maryland, College Park, MD. Kishek is a Senior Member of IEEE, as well as a member of American Physics Society, Tau Beta Pi, Alpha Nu Sigma, and Eta Kappa Nu. Photograph of UMER

W h a t   I   D o

What are Particle Accelerators? Particle accelerators are a foundation pillar for modern science and technology. By propelling subatomic particles to high energy, accelerators function as powerful microscopes peering on scales too small to see, from DNA molecules down to elementary particles. Lower-energy accelerators have many uses, such as cancer therapy or industrial processing. Future accelerators can also aid in harnessing fusion energy to fuel the future. Mission At the University of Maryland, we aspire to understand the science of accelerated beams so we can build better accelerators. Our quest is to increase the brightness of beams so as to make accelerators more efficient, to enable detection of rare particles, and to illuminate nano-sized molecules in motion. We do so with an innovative program based on low-cost, scaled experiments that are closely-coupled with theory and computer simulation. We are committed to educating students by involving them in a first-rate research program and exposing them to many aspects of designing, building, and running an accelerator. Approach Accelerator science is a broad interdisciplinary endeavor that offers opportunities for graduate and undergraduate students from different departments like electrical engineering, physics, or computer science. Here are some examples of what we do: The partial merger of five beamlets in configuration space and x-x' phase space: (right) simulation with WARP, 2002; (left) experimental measurement and tomographic phase-space reconstruction, 2007. Simulate: Beams are complex systems that involve the interaction of billions of particles. We employ sophisticated computational techniques to predict their behavior from first principles. Measure: We build, simulate, and test high-precision instruments to measure or diagnose the beams. Many of these are specially-made and involve significant mechanical and electronic challenges. Perturb: Real beams are not perfect. We developed several methods to deliberately introduce controlled imperfections so we can measure their effect on the beam. Control: Accelerators often have hundreds and thousands of components. Being able to adjust each of these for optimal performance is a complex problem in controls. Conversely, we use accelerators to test sophisticated controls techniques developed for process control in industry. Recent graduates from our group are now working at national laboratories such as SLAC, Lawrence Berkeley, Brookhaven, Los Alamos, and Jefferson Lab, and at companies such as General Electric and Microsoft.

Back to Top

R e p r e s e n t a t i v e   P u b l i c a t i o n s

Professor Kishek has authored over 165 publications on myriad topics. For a full list of linked publications, visit the publications page.   R.A. Kishek, "Ping-Pong Modes: A New Form of Multipactor," Physical Review Letters 108, 035003 (2012). B. Beaudoin, I. Haber, R.A. Kishek, S. Bernal, T. Koeth, D. Sutter, P.G. O'Shea, and M. Reiser, "Longitudinal Confinement and Matching of an Intense Electron Beam," Physics of Plasmas 18, 013104 (2011). K. Tian, R.A. Kishek, I. Haber, M. Reiser, and P.G. O'Shea, "Experimental Study of Large-Amplitude Perturbations in Space-Charge Dominated Beams," Physical Review Special Topics - Accelerators & Beams 13, 034201 (2010). Invited: D. Stratakis, R.A. Kishek, S. Bernal, R.B. Fiorito, I. Haber, M. Reiser, P.G. O'Shea, K. Tian, and J.C.T. Thangaraj, "Generalized Phase-Space Tomography for Intense Beams," Physics of Plasmas 17, 056701 (2010). David K. Abe, Rami Kishek, John J. Petillo, David P. Chernin, and Baruch Levush, "Periodic Permanent-Magnet Quadrupole Focusing Lattices for Linear Electron-Beam Amplifier Applications," IEEE Transactions on Electron Devices 56(5), 965-973 (2009). Invited: K. Tian, R.A. Kishek, P.G. O'Shea, R.B. Fiorito, D.W. Feldman, and M. Reiser, "Time-Dependent Imaging of Space-Charge-Dominated Electron Beams," Physics of Plasmas 15, 056707 (2008). R.A. Kishek, P.G. O'Shea, S. Bernal, I. Haber, J. Harris, Y. Huo, H. Li, and M. Reiser, "The University of Maryland Electron Ring: A Platform for Study of Galactic Dynamics on a Laboratory Scale," Annals of the New York Academy of Sciences 1045, 45-54 (2005). Invited: R.A. Kishek, S. Bernal, C.L. Bohn, D. Grote, I. Haber, H. Li, P.G. O'Shea, M. Reiser, and M. Walter, "Simulations and experiments with space-charge-dominated beams," Physics of Plasmas 10(5), 2016 (2003). R.A. Kishek, P.G. O'Shea, and M. Reiser, "Energy Transfer in non-Equilibrium Space-Charge-Dominated Beams," Physical Review Letters 85(21), 4514 (2000). S. Bernal, R.A. Kishek, M. Reiser, and I. Haber, "Observation and Simulation of Radial Density Oscillations in Space-Charge Dominated Electron Beams," Physical Review Letters 82, 4002 (1999). Invited: R.A. Kishek, Y.Y. Lau, L.K. Ang, A. Valfells, and R.M. Gilgenbach, "Multipactor Discharge on Metals and Dielectrics: Historical Review and Recent Theories," Physics of Plasmas 5(5), 2120 (1998). R.A. Kishek and Y.Y. Lau, "Multipactor Discharge on a Dielectric," Physical Review Letters 80(1), 193 (1998).   Particle-in-cell simulation of the merger of 5 beamlets showing phase mixing by chaotic particle orbits. Colored particles start from the same localized spot in phase space but exponentially diverge in a few plasma periods.

Back to Top

C o u r s e s   T a u g h t

Fall 2011: ENEE 686 Charged Particle Dynamics Fall 2009: ENEE 686 Charged Particle Dynamics Summer 2008: US Particle Accelerator School Beam Dynamics Experiments on the University of Maryland Electron Ring Spring 2007: ENEE 686 Charged Particle Dynamics Summer 2006: US Particle Accelerator School Beam Physics with Intense Space Charge Spring 2006: HONR 219L Working with Computers to Solve Real-World Problems: Science and the Computer Revolution Fall 2004: HONR 219L Working with Computers to Solve Real-World Problems: Science and the Computer Revolution Spring 2003: ENEE 686 Charged Particle Dynamics Spring 2001: HONR 219L Counting Faster: Science and the Computer Revolution Student Evaluations: "The teacher is awesome and I recommend this class to anyone!" "Your presentations have shown your dedication to prepare for every class." Output from HONR219L project on diffusion-limited aggregation process.

Back to Top

Biography What I Do Publications Courses Taught Schedule

index.html / © 2004-2012, contact Rami A. Kishek at ramiakumd.edu / Last Revised Thursday, Jun 7, 2012