One of the major goals of the Dynamical Systems and Accelerator Theory Group is the education of students and postdoctoral research associates, and fostering the research of visiting scientists. Listed below are past students associated with the program, and past visiting faculty, scientists, and postdoctoral research associates.

**David Douglas**, Ph.D. 1982

Thesis: Lie Algebraic Methods for Particle Accelerator Theory.

Employment: Previously employed by the Lawrence Berkeley Laboratory.
Currently employed by the Thomas Jefferson National Accelerator Laboratory (CEBAF).

**Etienne Forest**, Ph.D. 1984.

Thesis: Lie Algebraic Methods for Charged Particle Beams and Light Optics.

Employment: Previously employed by the Lawrence Berkeley Laboratory. Currently
employed by the KEK High Energy Physics Laboratory, Tsukuba, Japan and an
Associate Professor at the Graduate University for Advanced Studies, Kanagawa,
Japan.

**Janko Milutinovic**, Ph.D. 1984.

Thesis work done in Elementary Particle Theory while simultaneously receiving
training in Accelerator Theory.

Employment: Previously employed by the Brookhaven National Laboratory.
Presently employed on Wall Street.

**Liam Healy**, Ph.D. 1986.

Thesis: Lie Algebraic Methods for Treating Lattice Parameter Errors in Particle
Accelerators.

Employment: Previously at CERN. Currently with Celestial Mechanics Group at the
Naval Research Laboratory.

**Robert Ryne**, Ph.D. 1987

Thesis: Lie Algebraic Treatment of Space Charge.

Employment: Previously employed by Lawrence Livermore National Laboratory and
the Los Alamos National Laboratory.
Presently employed by the Lawrence Berkeley National Laboratory.

**Petra Schuett**(1987-88).

Worked one year at Maryland on Lie algebraic methods and Poisson solvers while
simultaneously completing her Ph.D. thesis work on Wake-Field Acceleration
under Thomas Weiland at DESY.

Employment: Presently with the Theoretische Elektrotechnik Group at the
Darmstadt Technische Hochschule.

**Govindan Rangarajan**, Ph.D. 1990.

Thesis: Invariants for Symplectic Maps and Symplectic Completion of Symplectic Jets.

Employment: Previously at Lawrence Berkeley Laboratory. Now Chairman of the
Mathematics Faculty, Indian Institute of Science, Bangalore, India.

**Rui Li**, Ph.D. 1990.

Thesis: Analytical and Numerical Investigation of the Longitudinal Coupling
Impedance.

Employment: Thomas Jefferson National Accelerator Laboratory (CEBAF).

**John Diamond**, M.S. 1990.

Spent two years as a Graduate Research Assistant working on the penetration of
electromagnetic fields through circular holes in a thick metallic wall. Also
carried out symbolic manipulation program calculations for various complicated
beamline elements such as combined-function quadrupoles and combined-function
bends. In addition, responsible for general computational support. Now working
at Adroit Systems, Alexandria, VA.

**William Detlefs**, M.S. (in Applied Math with Thesis) 1991.

Thesis: Longitudinal Coupling Impedance of a Thin Iris Collimator.

Employment: Subsequently a graduate student with support in Physics at Cal
Tech.

**Dan Abell**, Ph.D. 1995.

Thesis: Analytic Properties and Cremona Approximation of Transfer Maps for
Hamiltonian Systems.

Employment: Previously a Postdoctoral Research Associate, Physics Department,
University of Maryland.
Subsequently employed by Brookhaven National Laboratory. Now employed by Tech-X Corporation.

**Wen-hao Cheng**, Ph.D. 1995.

Thesis: Beam Dynamics of the Alternating Phase Focusing Linac and Frequency
Dependence of the Penetration of Electromagnetic Fields Through a Small
Coupling Hole in a Thick Wall.

Employment: Previously employed by Lawrence Berkeley Laboratory. Now with
Intel, Inc.

**Shicheng Jiang**, Ph.D. 1996.

Thesis: An Analytical and Numerical Investigation of the Coupling Impedance of
Irises in a Beam Pipe.

Employment: Cable & Wireless, Inc.

**Alexei Fedotov**, Ph.D. 1997.

Thesis: Longitudinal Coupling Impedance of a Hole in an Accelerator Beam Pipe
at Finite Frequencies.

Employment: Previously Postdoctoral Research Associate, Physics Department,
University of Maryland. Presently
employed by Brookhaven National Laboratory.

**Marco Venturini**, Ph.D. 1998.

Thesis: Lie Methods, Exact Map Computation, and the Problem of Dispersion in
Space Charge Dominated Beams.

Employment: Previously Postdoctoral Research Associate, Physics Department,
University of Maryland.
Subsequently employed by Stanford Linear Accelerator Center. Now employed by Lawrence Berkeley
Laboratory.

**Patrick Roberts**, M.S. 2000.

Scholarly Paper: Computation of Interior Vector Potential from Magnetic Field
Boundary Values.

Employment: Solipsys Corporation

**Timothy Stasevich**, M.S. 2001.

Scholarly Paper: Computing Transfer Maps from Magnetic Field Boundary Values.

Now carrying out nanoscience thesis
research in the Maryland Materials Research Science and Engineering Center.

**Maura Williams Roberts,**M.S. 2004

Scholarly Paper: Numerical Study of the Vlasov Equation in Spherical
Coordinates.

**Chad Mitchell**, Ph.D. December 2007.

Thesis: Calculation of Realistic Charged-Particle Transfer Maps.

Employment: Postdoctoral Research Associate, University of Maryland.

**Eric N. Opp**(1984-85)

Spent one year working on the development of a computer program to calculate
dispersion curves for azimuthally symmetric modes in an azimuthally symmetric
periodic chain of coupled cavities. Now has earned Ph.D. in Plasma Physics.

**Dimitris Vassiliadis**(1987-88)

Spent 1 1/2 years working as a Graduate Research Assistant on Alternating Phase
Focussing. Now has earned Ph.D. in a group working on chaos.

**Jeffrey Skibo**(1988-89)

Spent one year exploring possible further work on the use of Lie algebraic
methods in the treatment of space charge. Also responsible for general
computational support. Now has earned Ph.D. in High Energy Astrophysics.

**Eric Salter**(1990-91)

Spent one year working on the calculation of the impedance of a thick
iris. Also did programming for
MaryLie and provided general computational support. Subsequently worked toward a Ph.D. degree with space physics
group.

**Glenn VanderWoude**(1988-1992)

Undergraduate student and National Merit Scholar. Responsible for general computational support. Has since earned the Ph.D. degree in
applied mathematics from the State University of New York (Stony Brook) and is
now employed by SAIC..

**Suresh Aryangat**(1998)

Undergraduate Computer Science Student. Wrote Computer Science Senior
Honors Thesis on "Optimization of Multivariable Truncated Power Series
Multiplication Routines." Subsequently a graduate student in Computer
Science.

**David Fiske**(1999-2001)

Department Fellow and second year graduate student. Worked on optimized Truncated Power Series Algebra
algorithms and on properties of the Symplectic Group. Currently working with General Relativity Group.

**Frederick Strauch**(2001)

Third year graduate student.
Worked on factorization of general maps. Currently completing Ph.D. thesis research in Quantum
Computing.

**Aaron Bodoh-Creed**(B.S. 2001)

Undergraduate Physics Honors student.
Learned general Dynamical Systems and Accelerator Physics theory and provided
programming support.

**John Palastro**(Summer 2003)

First year graduate student. Worked on the program PREP. Currently interested
in Plasma Physics and Fusion.

**Benjamin Cooper**(Academic year 2004)

Second-year graduate student. Supported half by Department Fellowship and half
by DSAT Graduate Research Assistantship. Developed Mathematica programs for
determining factored Lie product concatenation formulas (for origin preserving
maps) to arbitrary order. Currently carrying out Ph.D. thesis research in the
Physics of Finance.

**Christos Papadopoulos**(Academic years 2003 and 2004)

First- and Second-year graduate student. Supported half by Department
Fellowship and half by DSAT Graduate Research Assistantship. Worked on
factorizing general maps and the one-turn map for the PEP II B-Factory
including synchrotron radiation damping, and on the computation of Taylor maps
for dissipative systems. Currently a Teaching Assistant.

Dr. **Herbert O. Moser** was a Visiting Scientist, supported by the German Government, during the year 1985. During that time he worked on applying Lie methods to dipoles with fringe fields. He is currently Director of the Singapore Synchrotron Light Source at the National University of Singapore.

Dr. **Hiromi Okamoto** was a Visiting Scientist, partially supported by the Japanese Government, during the years 1989-1990 and 1992-1993. During that time he worked on impedance and beam stability problems. He is currently at the Nuclear Science Laboratory, Institute for Chemical Research, Kyoto, Japan.

Dr. **Iliya M.
Kapchinsky** was a Visiting Professor of Physics
and Electrical Engineering from February 1, 1993 to April 30, 1993. During his
visit he interacted with graduate students and many colleagues (both from
Maryland and nearby Government Laboratories) who took advantage of his vast
expertise in many aspects of accelerator theory. In addition, he presented
about 10 lectures on the theory of linear accelerators. Unfortunately Dr.
Kapchinsky died May 2, 1993, before he was able to return to Russia. In
recognition of the widespread interest in his achievements and perspectives on
these subjects, and as a service to the Accelerator Science Community, his
lecture notes have been assembled and have been issued and broadly circulated
as a Los Alamos Report.

Dr. **Richard K. Cooper** was a Visiting
Professor of Physics from August 28, 1994 to December 24, 1994. During his
visit he worked with several of our graduate students and postdoctoral research
associates on their research and also on a new method of measuring the
transverse beam position in a beam pipe.

Dr. **Bruno Zotter **of CERN was a
visiting Professor of Physics during July 1999. During this visit he collaborated with Dr. Gluckstern on
shielding of coupling impedance by thin conducting layers around an intense
beam. He also interacted with
graduate students and post-docs in our Dynamical Systems and Accelerator Theory
Group, as well as with Dr. Reiser's group in Electrical Engineering. As a result of this visit, Drs. Zotter
and Gluckstern are continuing their collaboration, which is expected to result
in a major publication on shielding of intense beams by a thin conducting
layer, or thin conducting stripes.
Dr. Zotter was again a visiting Professor of Physics during July 2001. During this visit, he and Dr.
Gluckstern worked on the impedance of a cylindrical ferrite ring, a
configuration under consideration at Brookhaven National Laboratory by Drs.
Y.Y. Lee and M. Blaskiewicz.

Dr. Zotter also visited UMCP as a Visiting Professor of Physics during the periods 5/3-6/2/2002, 9/12-10/12/2003 and 5/15-6/13/2004. During these visits he and Dr. Gluckstern worked on the longitudinal and transverse impedance of a dielectric tube partially covered by a conducting layer, a configuration of interest to the LHC at CERN.

Dr. **Tugrul Hakioglu** was a visiting
Associate Professor of Physics in spring 2001 while on sabbatical leave from
Bilkent University in Turkey. He
and Dr. Dragt collaborated on work at the boundary between classical and
quantum mechanics by developing a Moyal-Lie theory of operators. It is expected that this work will
facilitate the passage between ray and wave optics in the case of light optics,
and classical and quasiclassical behavior in the case of quantum systems.

**Filippo Neri**(1983-90)

Postdoctoral Research Associate. Presently at Los Alamos National Laboratory.

**Fernando Casas**(1992-1993)

Visiting Postdoctoral Fellow, supported by Spanish Government. Presently a
Postdoctoral Fellow at Oxford University.

**Branislav Radak**(1992-1993)

Postdoctoral Research Associate. Presently employed on Wall Street.

**Johannes van Zeijts**(1987-1993)

Postdoctoral Research Associate. Presently at
Brookhaven National Laboratory.

**Ivan Gjaja**(1991-1994)

Postdoctoral Research Associate and SSC Fellow. Subsequently at the Center for
Nonlinear Studies at the Los Alamos National Laboratory. Presently employed on
Wall Street

**Huanchun Ye**(1993-1995)

Postdoctoral Research Associate. Presently employed at Skystation.

**Sergio Blanes**(1994-95 and 1995-96)

Visiting Postdoctoral Fellow, supported by Spanish Government.

**Sergey S. Kurennoy**(1994-96)

Postdoctoral Research Associate. Now at Los Alamos National Laboratory.

**Dan T. Abell**(1995-98)

Postdoctoral Research Associate. Subsequently at Brookhaven National
Laboratory. Presently at Tech-X
Corporation.

**Alexei Fedotov**(1997-99)

Postdoctoral Research Associate. Now at Brookhaven National Laboratory.

**Marco Venturini**(1998-1999)

Postdoctoral Research Associate. Subsequently at Stanford Linear
Accelerator Center. Presently at Lawrence Berkeley National Laboratory.

**Philip Johnson**(2000-2004)

Postdoctoral Research Associate. Now an Assistant Professor at American University.

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