Photo of Rami A. Kishek Rami A. Kishek

Research Professor

Institute for Research in Electronics & Applied Physics

Electrical & Computer Engineering
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ramiak_at_umd.edu
Ph.: (301) 405-5012
FAX: (301) 314-9437

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Rami A. Kishek, Research Professor
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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 Fellow of the American Physics Society, a Senior Member of IEEE, as well as a member of Tau Beta Pi, Alpha Nu Sigma, and Eta Kappa Nu. Photograph of UMER
Photograph of UMER

Professor Kishek leads the effort on the University of Maryland Electron Ring Facility, a small research accelerator investigating space charge dynamics. He has nearly 20 years' experience in charged particle dynamics and is an expert on space charge effects, computation, and multipactor, where he made groundbreaking contributions to its theoretical modeling. He has published over 190 scientific papers, delivered 45 invited talks, and has over 1000 citations to his work. Kishek is a scientific consultant for multiple companies and has chaired several workshops, most recently the 4th Workshop on the Microbunching Instability in FELs, held at University of Maryland, in April 2012. He has advised or co-advised 11 graduate students and guided the research of dozens more graduate, undergraduate, and high school students, and regularly teaches both at University of Maryland, and at the US Particle Accelerator School.
   
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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:
Photo comparing 5-beamlet experiment with simulation
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.
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Professor Kishek has authored over 190 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).
 
Chaotic mixing photo
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.
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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."


Diffusion-Limited Aggregation
Output from HONR219L project on diffusion-limited aggregation process.
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index.html / © 2004-2014, contact Rami A. Kishek at ramiak_at_umd.edu / Last Revised Friday, Apr 25, 2014