Beam Physics and Astrophysics at NIU
Beam Physics and Astrophysics at NIU
Thank you for visiting our site. We created this page is to introduce you to our research on beam physics, astrophysics, and chaotic dynamics. We are headquartered in the Physics Department of Northern Illinois University.
Our "mission statement" is to develop the premier university accelerator physics program in the State of Illinois while leveraging and enhancing the major local accelerator research facilities at Fermi National Accelerator Laboratory (FNAL) and Argonne National Laboratory (ANL). The confluence of these major facilities makes northern Illinois an ideal location for accelerator research and development.One feature of the discipline of accelerator physics is that it uses tools from a wide range of specialties. Consequently, new tools for
accelerator physics likewise are generally useful in other specialties. Our "subsidiary mission" is, therefore, to "map" new generic techniques
we develop for the study of nonequilibrium beams onto diverse problems in astrophysics, plasmas, fluids, etc.
Last update: 06/21/2007
This site is maintained by Philippe Piot (
piot@nicadd.niu.edu)
There are currently no job opportunities.
Professor Court Bohn
Associate Professor Philippe Piot
Assistant Professor Bela Erdelyi
Adjunct Professor John Lewellen
Research Scientist Ilya Pogorelov
Research Scientist Balsa Terzic
Research Associate Daniel Mihalcea
Research Associate Nikolai Vinogradov
Graduate Student Laura Bandura
Graduate Student Donna Kubik
Graduate Student James Maloney
Graduate Student Tim Maxwell
Graduate Student Edward Nissen
Graduate Student Marwan Rihaoui
Graduate Student Ben Sprague
Research Associate Nikolai Barov: Now at Far-Tech, Inc. , San Diego, CA.
Research Associate Ioannis Sideris: Now at the
Cosmology and Computational Group, part of the
Theoretical Physics Division at the University of Zurich, Zurich, Switzerland,
where he is a Tomalla Fellow.
Graduate Student Gregory Betzel: Earned MS; presently at Univ. of Canterbury, Christchurch, NZ
working toward a PhD in medical physics.
Graduate Student Dan Bollinger: Earned MS; presently at Fermilab, Batavia, IL.
Graduate Student Elizabeth Holden: Earned MS by working at Fermilab on the Sloan Digital Sky Survey;
presently in Madison, WI pondering whether to continue in physics (she should continue!).
Graduate Student Shafaq Motem: Earned MS by working on a low energy photo-emission
electron source for electron microscopy.
Professor Henry Kandrup
(University of Florida - deceased 18 October 2003, but never forgotten)
Professor Uwe Happek (University of Georgia)
Professor David Merritt (Rochester Institute of Technology)
Professor Ben Moore (University of Zurich )
Professor Patrick O'Shea (University of Maryland)
Dr. Michael Borland (Argonne National Laboratory)
Dr. Jurgen Diemand (University of California, Santa Cruz)
Dr. Alister Graham (Australian National University)
Dr. Carlos Hernandez-Garcia (Jefferson Laboratory)
Dr. Rami Kishek (University of Maryland)
Dr. Peter Ostroumov (Argonne National Laboratory)
Dr. Ji Qiang (Lawrence Berkeley National Laboratory)
Dr. Monica Valluri (University of Chicago)
Particle accelerators are the largest and among the most expensive scientific instruments in existence. Their theory, design, and understanding requires a host of tools and methods ranging from applied physics to pure mathematics. Charged-particle beams are not isolated systems; thus, they exhibit fascinating nonlinear dynamics and chaotic behavior. They represent probably the most complex low-dimensional Hamiltonian system of practical interest. There is also a wide range of practical applications of accelerators and beams.
The context of our research spans both electron beams and hadron beams. Concerning electron beams, our focus is principally on sources, i.e., electron injectors. Of special interest are (1) high-brightness sources that will feed 4th-generation light sources (4GLS) and/or a linear electron-positron collider (ILC), and (2) high-average-current sources that will feed accelerator drivers for high-average-power free-electron lasers (link). Concerning hadron beams, our focus is on both high-average-current accelerators such as is required for copious production of spallation neutrons (SNS), and on the Rare Isotope Accelerator (RIA) envisioned for nuclear-physics experiments of astrophysical interest, wherein beam strippers (thin foils) can greatly perturb the beam dynamics.
Our main research activities center on the following general topics: (1) the production of high-brightness electron and ion beams, (2) high-resolution electron-beam diagnostics, and (3) theory and simulation of nonequilibrium beams. Our program has been primarily theoretical and has entailed the development of cross-disciplinary techniques of nonlinear dynamics and their application to charged-particle beams. These techniques are related (but not limited) to the validity of the continuum limit in N-body simulations of beams and galaxies, the existence of chaotic orbits in both time-independent and time-dependent N-body systems, chaotic mixing in these systems, the validity of the continuum limit (Vlasov-Poisson formalism), and noise-enhanced halos.
Our work includes laboratory experiments involving novel beam diagnostics that have been done at the Fermilab/NICADD Photoinjector Laboratory (FNPL). We are also collaborating with the University of Maryland in planning experiments on the fundamental dynamics of space charge in beams that will be done at the University of Maryland Electron Ring (UMER). As we explain briefly below, and more thoroughly in a recent paper (PostScript / PDF), these experiments relate to violent relaxation during the evolution of galaxies and thereby comprise a program of laboratory galactic dynamics. We (especially Prof. Philippe Piot) are also building an in-house Beam Diagnostic Laboratory, one that will include an electron gun for testing and commissioning new instrumentation. We are grateful for help from John Lewellen at Argonne and Kevin Jordan at Jefferson Lab for their assistance in this endeavor.
A major component of our research program involves the design of the proposed Rare Isotope Accelerator (RIA). RIA has the highest priority for a new construction for the Nuclear Physics community. We are involved in the modeling and design of several components of the accelerator complex: from finding novel tuning methods of approximately 400 independently phased superconducting resonators to allow acceleration of every element from protons to uranium with optimal parameters, design of high resolution isotope separators with large acceptance, high power beam dumps, to ion optics for gas catchers. The large phase spaces require precision modeling of dynamics, including higher order aberrations, and the use of sophisticated codes like COSY Infinity, an arbitrary order charged particle optics code based on differential algebra, and a general purpose nonlinear dynamics code.
Our research has revealed that the hierarchies of temporal and spatial scales are critically important drivers of the evolution of beams with space charge; we have found that details do matter. Consequently, we have embarked on an intensive effort to develop a new space-charge algorithm that faithfully preserves these hierarchies while still enabling efficient computations. The underlying methodology is multiresolution analysis, e.g., application of wavelets.
The study of Hamiltonian systems in general led to the development of seemingly two different branches of mathematics: the theory of dynamical systems and symplectic geometry. Both fields have undergone dramatic recent development and it is becoming clear that there is a common core which could lead to a new field called "symplectic dynamics". We (especially Prof. Bela Erdelyi) are investigating this connection. One of the best test beds of this new field is the accelerator (or particle beams in general).
Our group has also been involved in a number of astrophysical projects.We have investigated effects of supermassive black hole binaries as an example of resonant phase mixing and as a potential explanation of inversions and other anomalous features observed in the luminosity profiles of some elliptical galaxies. More recently, we have devised a density-potential pair for spherical galaxies capable of fitting observed light profiles (both near and away from the center) in virtually all elliptical galaxies, including the ones with depleted cores (PostScript / PDF). These spherical models may also prove appropriate for describing the dark matter distribution in halos formed from Lambda Cold Dark Matter cosmological simulations, which is what we are currently investigating along with our collaborators.
In summary, we are developing new theories and methods to describe, simulate, and gain further insight into the behavior of particle beams. The methods range from abstract mathematics from symplectic geometry and topology, through advanced numerical methods such as differential algebra and symplectic integration, to experiments.
We hope you find the description of our research and the results of our publications to be of interest.
Hardware:
Our group is equipped with a Beowulf cluster.
It consists of 56 dual processor nodes, connected through a 100 Mbit network. The operating system is Fedora Linux, and the installed software
includes up-to-date Intel Fortran 90 and GNU C++/g77 compilers, PV-WAVE, ROOT, PAW analysis packages, LATEX and OpenOffice word processors.
CONDOR batch system and support for LAM/MPI application allows effective utilization of cluster resources:
Server:
1Gb RAM, 2x Athlon 2600+, shared 1.5Tb raid array
Worker nodes:
1GB RAM/node, Amd Opteron 1800(2x15 nodes), Amd Atlon 2400+(2x24), 1800+(2x16),
shared disk space: 4.5Tb
Cluster map: Screenshot of Nagios monitoring system
Software:
- We have 21 licenses of the PV-WAVE software. PV-WAVE is a program that can be used heavily for visualization and analysis of data. It has been
used in many fields of science (mainly physics and engineering) and has a very good track record. It can be used on different platforms
(Windows or Linux) and works in command-line or graphic environments. For more information about PV-WAVE you can visit the vendor's site: http://www.vni.com/index.html.
- ROOT - a free platform independent analysis tool developed at CERN.
Very sutable for processing huge amount of data. Project home page
http://root.cern.ch.
- LAM (Local Area Multicomputer) package - allows writing/running
parallel programs on cluster.
Documentation:
http://www.lam-mpi.org/using/docs/.
- CONDOR - an effective batch job management system.
Project homepage
http://www.cs.wisc.edu/condor.
1. BP&A Group Refereed Publications
2. BP&A Group Unrefereed Publications
3. Relevant Pre-BP&A Group Publications since 2000
4. BP&A Group Student Theses
Design study of a pre-separator for the LINAG Super Separator Spectrometer
A. Drouart, B. Erdelyi, B Jacquot, S. Manikonda, J. Nolen, A Villari
NIM B (Submitted, 2007)
( PDF )
Results from the UCLA/FNPL underdense plasma lens experiment
M. C. Thompson, H. Badakov, J. B. Rosenzweig, G. Travish, H. Edwards, R. Fliller, G. M.
Kazakevich
P. Piot, J. Santucci, J. Li, R. Tikhoplav
International Journal of Modern Physics A, Vol. 22, No. 22, 3979-3987 (2007)
( PDF )
Local Calculation of Hofer's Metric and Applications to Beam Physics
B. Erdelyi
Journal of Geometry and Symmetry in Physics, 9: 9-31 (2007)
( PDF )
Symmetry-Based Design of Fragment Separator Optics
B. Erdelyi , J. Maloney, J. Nolen
Physical Review Special Topics - Accelerators and Beams 10: 064002-1 - 064002-17 (2007)
( PDF )
Realistic Triaxial Density-Potential-Force Profiles for Stellar Systems and Dark Matter Halos
Balsa Terzic and Benjamin Sprague
Monthly Notices of the Royal Astronomical Society 357: 855-866 (2007)
( PDF )
Global Theory of Extended Generating Functions
Bela Erdelyi
International Journal of Pure and Applied Mathematics 33(4): 553-578 (2006)
( PDF )
On Relaxation Processes in Collisionless Mergers
Monica Valluri, Ileana M. Vass, Stelios Kazantzidis, Andrey V. Kravtsov, and Courtlandt L.Bohn
Astrophysical Journal (in press)
( PostScript ) ( PDF )
Transverse-to-Longitudinal Emittance Exchange to Improve Performance of High-Gain Free-Electron Lasers
P. Emma, Z. Huang, K.-J. Kim, P. Piot
Physical Review Special Topics - Accelerators and Beams 9: 100702-1 - 100702-8 (2006)
( PDF )
Improved Simulations of Photoinjectors for High-Average-Current Free-Electron Lasers
Courtlandt L. Bohn, Daniel Mihalcea, Ilya V. Pogorelov, Ioannis V. Sideris, and Balsa Terzic
Journal of Directed Energy 2: 163-188 (2006)
( PDF )
Particle-in-Cell Beam Dynamics Simulations With A Wavelet-Based Poisson Solver
Balsa Terzic, Ilya V. Pogorelov, and Courtlandt L. Bohn
Physical Review Special Topics - Accelerators and Beams 10: 034201-1 - 034201-22 (2007)
( PDF )
Empirical Models for Dark Matter Halos. I. Model Comparison
David Merritt, Alister W. Graham, Ben Moore, Juerg Diemand, and Balsa Terzic
Astronomical Journal 132: 2685-2700 (2006)
( PDF )
Empirical Models for Dark Matter Halos. II. Inner profile slopes, dynamical profiles, and rho/sigma^3
Alister W. Graham, David Merritt, Ben Moore, Juerg Diemand, and Balsa Terzic
Astronomical Journal 132: 2701-2710 (2006)
( PDF )
Empirical Models for Dark Matter Halos. III. The Kormendy relation and the log rho_e - log R_e relation
Alister W. Graham, David Merritt, Ben Moore, Juerg Diemand, and Balsa Terzic
Astronomical Journal 132: 2711-2716 (2006)
( PDF )
Longitudinal Electron Bunch Diagnostics Using Coherent Transition Radiation
D. Mihalcea, C. L. Bohn, U. Happek, and P. Piot
Physical Review Special Topics - Accelerators and Beams 9: 082801-1 - 082801-7 (2006)
( PDF )
Experimental Investigation of the Longitudinal Beam Dynamics in a Photoinjector
Using a Two-Macroparticle Bunch
P. Piot, R. Tikhopav, D. Mihalcea, and N. Barov
Physical Review Special Topics - Accelerators and Beams 9: 053501-1 - 053501-7 (2006)
( PDF )
Photoinjector-Generation of a Flat Electron Beam with Transverse Emmitance Ratio of 100
P. Piot, Y.-E. Sun, K.-J. Kim
Physical Review Special Topics - Accelerators and Beams 9:, 031001-1 - 031001-7 (2006)
( PDF )
A Measure of Orbital Stickiness and Chaos Strength
Ioannis V. Sideris
Physical Review E 73: 066217 (2006)
( PostScript (23 Mbytes) )
( Zipped PostScript (6 Mbytes) )
( PDF (12 Mbytes) )
Supplementary pictures not appearing in the paper in PostScript format:
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Supplementary pictures not appearing in the paper in PDF format:
( Suppl. picture 1 )
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First Operation of a Free-Electron Laser Generating GW Power Radiation at 32 nm Wavelength
V. Ayvazyan, N. Baboi, J. Bahr, V. Balandin, B. Beutner, A. Brandt, I. Bohnet, A. Bolzmann,
R. Brinkmann, O.I. Brovko, J.P. Carneiro, S. Casalbuoni, M. Castellano, P. Castro, L. Catani,
E. Chiadroni, S. Choroba, A. Cianchi, H. Delsim-Hashemi, G. Di Pirro, M. Dohlus, S. Dusterer,
H.T. Edwards, B. Faatz, A.A. Fateev, J. Feldhaus, K. Flottmann, J. Frisch, L. Frohlich,
T. Garvey, U. Gensch, N. Golubeva, H.-J. Grabosch, B. Grigoryan, O. Grimm, U. Hahn, J.H. Han,
M. v. Hartrott, K. Honkavaara, M. Huning, R. Ischebeck, E. Jaeschke, M. Jablonka, R. Kammering,
V. Katalev, B. Keitel, S. Khodyachykh, Y. Kim, V. Kocharyan, M. Korfer, M. Kollewe, D. Kostin,
D. Kramer, M. Krassilnikov, G. Kube, L. Lilje, T. Limberg, D. Lipka, F. Lohl, M. Luong, C. Magne,
J. Menzel, P. Michelato, V. Miltchev, M. Minty, W.D. Moller, L. Monaco, W. Muller, M. Nagl,
O. Napoly, P. Nicolosi, D. Nolle, T. Nunez, A. Oppelt, C. Pagani, R. Paparella, B. Petersen,
B. Petrosyan, J. Pfluger, P. Piot, E. Plonjes, L. Poletto, D. Proch, D. Pugachov, K. Rehlich,
D. Richter, S. Riemann, M. Ross, J. Rossbach, , M. Sachwitz, E.L.Saldin, W. Sandner, H. Schlarb,
B. Schmidt, M. Schmitz6, P. Schmuser, J.R. Schneider, E.A. Schneidmiller, H.-J. Schreiber,
S. Schreiber, A.V. Shabunov, D. Sertore, S. Setzer, S. Simrock, E. Sombrowski, L. Staykov,
B. Steffen, F. Stephan, F. Stulle, K.P. Sytchev, H. Thom, K. Tiedtke, M. Tischer, R. Treusch,
D. Trines, I. Tsakov, A. Vardanyan, R. Wanzenberg, T. Weiland, H. Weise, M. Wendt, I. Will,
A. Winter, K. Wittenburg, M.V. Yurkov, I. Zagorodnov, P. Zambolin, and K. Zapfe
European Journal of Physics D 37: 297-303 (2006)
( PDF )
Optic Issues in Ongoing ERL Projects
S.L. Smith, B.D. Muratori, H.L. Owen, G.H. Hoffstaetter,
V.N. Litvinenko,I. Ben-Zvi, M. Bai, J. Beebe-Wang, M. Blaskiewicz,
J.M. Brennan, R.Calaga, W. Fischer, X.Y. Chang,
D. Kayran, J. Kewisch, W.W. MacKay, C. Montag, B.Parker,V.Ptitsyn,
T. Roser, A. Ruggiero, T. Satogata, B. Surrow,
S. Tepikian, D. Trbojevic, V. Yakimenko, S.Y. Zhang, and Ph. Piot
Nuclear Instruments and Methods in Physics Research Section A:
Accelerators, Spectrometers, Detectors, and Associated Equipment 557: 145-164 (2006)
( PDF )
Modeling and Visualizing the Particle Beam in the Rare Isotope Accelerator
Chris Rosenthal and Bela Erdelyi
DOE Journal of Undergraduate Research 6: 83-90 (2006)
( PDF )
Chaotic Dynamics and Halo Formation in Charged-Particle Beams
Courtlandt L. Bohn, Gregory T. Betzel, and Ioannis V. Sideris
Nuclear Instruments and Methods in Physics Research Section A:
Accelerators, Spectrometers, Detectors, and Associated Equipment 561: 230-236 (2006)
( PostScript )( PDF )
A Precision Tool for Dissecting Orbital Dynamics in Time-dependent Potentials
Courtlandt L. Bohn and Balsa Terzic
Physical Review E Rapid Communications (submitted)
( PostScript )( PDF )
Density-Potential Pairs for Spherical Stellar Systems with Sersic Light-Profiles and (Optional) Power-Law Cores
Balsa Terzic and Alister W. Graham
Monthly Notices of the Royal Astronomical Society 362: 197-221 (2005).
( PostScript ) ( PDF )
Generation of Angular-Momentum-Generated Electron Beams from a Photoinjector
Y.-E. Sun, P. Piot, K.-J. Kim, N. Barov, S. Lidia, J. Santucci, R. Tikhoplav, and J. Wennerberg
Physical Review Special Topics - Accelerators and Beams 7: 123501-1 - 123501-2 (2004)
( PostScript ) ( PDF )
Production of Enhanced Beam Halos via Collective Modes and Colored Noise
Ioannis V. Sideris and Courtlandt L. Bohn
Physical Review Special Topics - Accelerators and Beams 7: 104202-1 - 104202-13 (2004)
( PostScript ) ( PDF )
The Validity of the Continuum Limit in the Gravitational N-Body Problem
Ioannis V. Sideris
Celestial Mechanics 90 (1-2): 149-164 (2004)
( PostScript ) ( PDF )
Noise-Enhanced Parametric Resonance in Perturbed Galaxies
Ioannis V. Sideris and Henry E. Kandrup
Astrophysical Journal 602: 678-684 (2004)
( PostScript ) ( PDF )
Fluctuations Do Matter: Large Noise-Enhanced Halos in Charged-Particle Beams
Courtlandt L. Bohn and Ioannis V. Sideris
Physical Review Letters 91: 264801-1 - 264801-4 (2003)
( PostScript ) ( PDF )
Simulations and Experiments with Space-Charge-Dominated Beams
R.A. Kishek, S Bernal, C.L. Bohn, D. Grote,
I. Haber, H. Li, P.G. O'Shea, M. Reiser, and M. Walter
Physics of Plasmas 10: 2016-2021 (2003)
( PostScript ) ( PDF )
Energy Loss of a High Charge Bunched Electron Beam in Plasmas
N. Barov, J.B. Rosenzweig, M.C. Thompson, and R Yoder
Physical Review Special Topics - Accelerators and Beams 7: 061301-1 - 061301-11 (2004)
( PostScript ) ( PDF )
Supermassive Black Hole Binaries as Galactic Blenders
Henry E. Kandrup, Ioannis V. Sideris, Balsa Terzic, and Courtlandt L. Bohn
Astrophysical Journal 597: 111-130 (2003)
( PostScript ) ( PDF )
Chaos and the Continuum Limit in Charged-Particle Beams
Henry E. Kandrup, Ioannis V. Sideris, and Courtlandt L. Bohn
Physical Review Special Topics - Accelerators and Beams 7: 014202-1 - 014202-11 (2004)
( PostScript ) ( PDF )
Chaotic Orbits in Thermal-Equilibrium Beams: Existence and Dynamical Implications
Courtlandt L. Bohn and Ioannis V. Sideris
Physical Review Special Topics - Accelerators and Beams 6: 034203-1 - 034203-15 (2003)
( PostScript ) ( PDF )
Transient Chaos and Resonant Phase Mixing in Violent Relaxation
Henry E. Kandrup, Ileana Vass, and Ioannis V. Sideris
Monthly Notices of the Royal Astronomical Society 341: 927-936 (2003)
( PostScript ) ( PDF )
Simulation of the microbunching instability in beam delivery systems for free-electron lasers
I. Pogorelov, J. Qiang, R. Ryne, M. Venturini, A. Zholents,R. Warnock
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Plans for a 750 MeV electron beam test facility at Fermilab
M. Church, S. Nagaitsev, P. Piot
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Code development for next-generation high-intensity large acceptance fragment
separators
B. Erdelyi, L. Bandura, J. Nolen, S. Manikonda
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Optical effects of energy degraders on the performance of fragment separators
L. Bandura, B. Erdelyi, J. Nolen
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Influence of chaos on resonance crossings
E. Nissen, C. L. Bohn
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Design study of a tranverse-to-longitudinal emittance exchange proof-of-principle
Y.-E Sun, J. G. Power, K.-J. Kim, P. Piot, M. M. Rihaoui
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Vector diffraction theory and coherent transition radiation interferometry in electron linac
T. J. Maxwell, C. L. Bohn, D. Mihalcea, P. Piot
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Impact of transverse irregularities at the photocathode on the production of high-charge electron bunches
M. Rihaoui, C. L. Bohn, P. Piot, J. G. Power
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Pepper-pot based emittance measurement of the AWA photoinjector
J. G. Power, M. E. Conde, W. Gai, F. Gao, R. Konecny, W. Liu, Z. Yusof, P. Piot, M. Rihaoui
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Observation of underdense plasma lens focusing of relativistic electron beams
M. C. Thompson, H. Badakov, J. B. Rosenzweig, G. Travish, R. Fliller, G. M. Kazakevich, P. Piot, J. Santucci
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Polarized pulsed beam source for electronic microscopy
N. Vinogradov, C. L. Bohn, P. Piot, J. W. Lewellen, J. R. Noonan
Proceedings of the 22nd Particle Accelerator Conference (PAC'07),
Albuquerque, New Mexico (25-29 June 2007)
( PDF )
Photoinjectors R&D for Future Light Sources and Linear Colliders
P. Piot
Proceedings of the 2006 Linear Accelerator Conference,
Knoxville, TN (21-25 August 2006)
( PDF )
Emittance Exchange at FNPL
T. W. Koeth, R. Andrews, D. A. Edwards, H. Edwards, R. P. Fliller, M. J. Syphers, P. Piot
Proceedings of the 2006 Linear Accelerator Conference,
Knoxville, TN (21-25 August 2006)
( PDF )
Photoinjector Production of a Flat Beam with Transverse Emittance Ratio of 100
P. Piot, Y.-E Sun, K.-J. Kim
Proceedings of the 2006 Linear Accelerator Conference,
Knoxville, TN (21-25 August 2006)
( PDF )
A Compact, Normal-conducting, Polarized Electron, L-band PWT Photoinjector for the ILC
D. Yu, Y. Luo, A. Smirnov, I. V. Bazarov, R. P. Fliller, P. Piot
Proceedings of the 2006 Linear Accelerator Conference,
Knoxville, TN (21-25 August 2006)
( PDF )
UCLA/FNPL Underdense Plasma Lens Experiment: Results and Analysis
M. C. Thompson, H. Batakov, J. B. Rosenzweig, G. Travish, R. Fliller, G. M. Kazakevtch, P. Piot, J. Santucci, J. Li, and R. Tikhoplav
Proceedings of the Twelfth Advanced Accelerator Concepts Workshop,
Lake Geneva, Wisconsin (10-15 July 2006)
( PDF )
Summary Report of Working Group 5: Beam Generation, Monitoring, and Control
John Lewellen and Philippe Piot
Proceedings of the Twelfth Advanced Accelerator Concepts Workshop,
Lake Geneva, Wisconsin (10-15 July 2006)
( PDF )
Multiresolution Simulations of Photoinjectors
D. Mihalcea, C. L. Bohn, B. Terzic
Proceedings of the Twelfth Advanced Accelerator Concepts Workshop,
Lake Geneva, Wisconsin (10-15 July 2006)
( PDF )
3.9 GHz Deflecting Cavity as a Bunch Length Diagnostics
T. Koeth, L. Bellantoni, H. Edwards, and P. Piot
Proceedings of the 12th International Conference on rf Superconductivity,
Ithaca, New York (10-15 July 2005)
( PDF )
A polarized electron PWT photoinjector for the ILC
D. Yu, Y. Luo, A. Smirnov, I. Bazarov, and P. Piot
Proceedings of the Second ILC Workshop,
Snowmass, Colorado (14-27 August 2005)
( PDF )
Application of Multiscale Methodology to Beam Simulations
Balsa Terzic and Ilya Pogorelov
Proceedings of the Nanobeam 2005 Workshop,
Kyoto, Japan ( 17-21 October 2005)
( PostScript ) ( PDF )
SciDAC Advances and Applications in Computational Beam Dynamics
R. Ryne, D. Abell, A. Adelmann, J. Amundson, C. Bohn, J. Cary, P. Colella,
D. Dechow, V. Decyk, A. Dragt, R. Gerber, S. Habib, D. Higdon, T. Katsouleas,
K.-L. Ma, P. McCorquodale, D. Mihalcea, C. Mitchell, W. Mori, C.T. Mottershead,
F. Neri, I. Pogorelov, J. Qiang, R. Samulyak, D. Serafini, J. Shalf, C. Siegerist,
P. Spentzouris, P. Stoltz, B. Terzic, M. Venturini, and P. Walstrom
Journal of Physics: Conference Series 16, pp. 210-214 (2005).
( PDF )
Applications of Differential Algebraic Methods in Beam Physics
Bela Erdelyi
Proceedings of the Workshop on High Power Superconducting Linear Accelerators,
Naperville, Illinois (22-24 May 2005)
( PDF )
Extensive Halos in Beams due to Noise
Ioannis V. Sideris and Courtlandt L. Bohn
Proceedings of the Workshop on High Power Superconducting Linear Accelerators,
Naperville, Illinois (22-24 May 2005)
( PostScript ) ( PDF )
A New Wavelet-Based Particle-In-Cell Code For Beam Simulations
Balsa Terzic and Ilya Pogorelov
Proceedings of the Workshop on High Power Superconducting Linear Accelerators,
Naperville, Illinois (22-24 May 2005)
( PostScript ) ( PDF )
Chaos in Time-Dependent Space-Charge Potentials
Greg T. Betzel, Ioannis V. Sideris, Courtlandt L. Bohn
Proceedings of the 2005 Particle Accelerator Conference,
Knoxville, Tennessee (16-20 May 2005)
( PostScript )( PDF )
Longitudinal Electron Bunch Diagnostics Using Coherent Transition Radiation
Daniel Mihalcea, Courtlandt L. Bohn, Uwe Happek, Philippe Piot
Proceedings of the 2005 Particle Accelerator Conference,
Knoxville, Tennessee (16-20 May 2005)
( PostScript ) ( PDF )
Feasibility Study of Beam-Beam Compensation in the Tevatron with Wires
Tanaji Sen, Bela Erdelyi
Proceedings of the 2005 Particle Accelerator Conference,
Knoxville, Tennessee (16-20 May 2005)
( PDF )
Characterization of the Chaotic or Regular Nature of Dynamical Orbits: a New, Fast Method
Ioannis V. Sideris
Proceedings of the 2005 Particle Accelerator Conference,
Knoxville, Tennessee (16-20 May 2005)
( PostScript ) ( PDF )
Wavelet-Based Poisson Solver for Use in Particle-in-Cell Simulations
Balsa Terzic and Ilya V. Pogorelov, Daniel Mihalcea, Courtlandt L. Bohn
Proceedings of the 2005 Particle Accelerator Conference,
Knoxville, Tennessee (16-20 May 2005)
( PostScript ) ( PDF )
Simulations of Error-Induced Beam Degradation in Fermilab's Booster Synchrotron
Phil S. Yoon, Weiren Chou, Courtlandt L. Bohn
Proceedings of the 2005 Particle Accelerator Conference,
Knoxville, Tennessee (16-20 May 2005)
( PostScript ) ( PDF )
Chaotic Dynamics in Charged-Particle Beams: Possible Analogs of Galactic Evolution
Courtlandt L. Bohn
Annals of the New York Academy of Sciences 1045: 34-44
Nonlinear Dynamics in Astronomy and Physics: to honor the late Professor Henry Kandrup,
University of Florida, Gainesville, Florida (4-6 November 2004)
( PostScript ) ( PDF )
Chaotic Collisionless Relaxation in Galaxies and Charged-Particle Beams
Henry E. Kandrup, Courtlandt L. Bohn, Rami A. Kishek, Patrick. G. O'Shea,
Martin Reiser, and Ioannis V. Sideris
Annals of the New York Academy of Sciences 1045: 12-33
Nonlinear Dynamics in Astronomy and Physics: to honor the late Professor Henry Kandrup,
University of Florida, Gainesville, Florida (4-6 November 2004)
( PostScript ) ( PDF )
Characterization of Chaos: a New Fast and Effective Measure
Ioannis V. Sideris
Annals of the New York Academy of Sciences 1045: 79-92
Nonlinear Dynamics in Astronomy and Physics: to honor the late Professor Henry Kandrup,
University of Florida, Gainesville, Florida (4-6 November 2004)
( PostScript ) ( PDF )
Wavelet-Based Poisson Solver for Use in Particle-in-Cell Simulations
Balsa Terzic and Ilya V. Pogorelov
Annals of the New York Academy of Sciences 1045: 55-67
Nonlinear Dynamics in Astronomy and Physics: to honor the late Professor Henry Kandrup,
University of Florida, Gainesville, Florida (4-6 November 2004)
( PostScript ) ( PDF )
Computational Accelerator Physics Working Group Summary
John R. Cary and Courtlandt L. Bohn
American Institute of Physics Conference Proceedings 737: 231-242.
Eleventh Advanced Accelerator Concepts Workshop,
Stony Brook, New York (21-26 June 2004)
( Postscript ) ( PDF )
Collective Modes and Colored Noise as Beam-Halo Amplifiers
Courtlandt L. Bohn
American Institute of Physics Conference Proceedings 737: 456-461.
Eleventh Advanced Accelerator Concepts Workshop,
Stony Brook, New York (21-26 June 2004)
( Postscript ) ( PDF )
Large Diffuse Halos in Time-Dependent Space-Charge Potentials with Colored Noise
Courtlandt L. Bohn and Ioannis V. Sideris
Proceedings of the 2003 Particle Accelerator Conference,
Portland, Oregon (12-16 May 2003)
( PostScript ) ( PDF )
Mixing of Regular and Chaotic Orbits in Charged-Particle Beams
C.L. Bohn, I.V. Sideris, H.E. Kandrup, and R.A. Kishek
Proceedings of the XXI International Linear Accelerator Conference,
Gyeongju, Korea (19-23 August 2002)
( PostScript ) ( PDF )
Plasma Wakefield Experiments
N. Barov, M.C. Thompson, K. Bishofberger, B. Rosenzweig, H. Edwards, and J. Santucci
American Institute of Physics Conference Proceedings 649: 71-80 (2002)
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Coherent Synchrotron Radiation: Theory and Experiments
Courtlandt L. Bohn
American Institute of Physics Conference Proceedings 647: 81-95 (2002)
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Energy Loss a High Charge Bunched Electron Beam in Plasma: Nonlinear Plasma Response and Linear Scaling
J.B. Rosenzweig, N. Barov, M.C. Thompson, and R. Yoder
American Institute of Physics Conference Proceedings 647: 577-291 (2002)
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Phase Mixing of Chaotic Orbits an an Irreversible ``Relaxation'' Mechanism
C.L. Bohn, I.V. Sideris, H.E. Kandrup, and R.A. Kishek
Proceedings of the ICFA Beam Dynamics Mini-Workshop on Coherent Synchrotron Radiation,
Zeuthen, Germany (14-18 January 2002),
( PostScript ) ( PDF )
Smooth Potential Simulations and N-Body Simulations
Henry E. Kandrup and Ioannis V. Sideris
Astrophysical Journal, 585: 244-250 (2003)
( PostScript ) ( PDF )
Plasma Electron Fluid Motion and Wave Breaking near a Density Transition
R. J. England, J. B. Rosenzweig, N. Barov
Physical Review, E 66: 016501-1 - 016501-8 (2002)
( PostScript ) ( PDF )
Chaos in Cuspy Triaxial Galaxies with a Supermassive Black Hole: A Simple Toy Model
Henry E. Kandrup and Ioannis V. Sideris
Celestial Mechanics and Dynamical Astronomy 82: 61-81 (2002)
( PostScript )( PDF )
Chaos and the Continuum Limit in the Gravitational N-Body Problem.II.
Nonintegrable Potentials
Ioannis V. Sideris and Henry E. Kandrup
Physical Review E 65: 066203-1 - 066203-14 (2002)
( PostScript ) ( PDF )
Chaos and the Continuum Limit in the Gravitational N-Body Problem. Integrable Potentials
Henry E. Kandrup and Ioannis V. Sideris
Physical Review E 64: 056209-1 - 056209-11 (2001)
( PostScript )( PDF )
Chaotic Mixing in Charged-Particle Beams and Galaxies
Courtlandt L. Bohn, Henry E. Kandrup, and Rami A. Kishek
Proceedings of Snowmass 2001, edited by C. M. Sazama, eConf C01/06/30, M302 (2001)
( PostScript ) ( PDF )
Chaos, Ergodicity, and the Thermodynamics of Lower-Dimensional Hamiltonian Systems
Henry E. Kandrup, Ioannis V. Sideris, and Courtlandt L. Bohn
Physical Review E 65: 016214-1 - 016214-16 (2001)
( PostScript ) ( PDF )
Plasma Electron Trapping and Acceleration in a Plasma Wake Field Using a Density Transition
H. Suk, N. Barov, J. B. Rosenzweig, E. Esarey
Physical Review Letters 86: 1011-1014 (2001)
( PostScript ) ( PDF )
Computational Investigation of Dissipation and Reversibility of Space-Charge Driven Processes in Beams
R.A. Kishek, C.L. Bohn, I. Haber, P.G. O'Shea, M. Reiser, and H.E. Kandrup
Proceedings of the 2001 IEEE Particle Accelerator Conference,
Chicago, IL, IEEE Press, edited by P. Lucas and S. Weber, IEEE Cat. No. 01CH37268 , pp. 151-153 (2001)
( PostScript ) ( PDF )
Preserving High Multibunch Luminosity in Linear Colliders
Courtlandt L. Bohn and King-Yuen Ng
Physical Review Letters 85: 984-987 (2000)
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[erratum: ( PostScript ) ( PDF )]
Dynamics of Cuspy Triaxial Galaxies with a Supermassive Black Hole
Christos Siopis, Ioannis V. Sideris, Ilya V. Pogorelov, and Henry E. Kandrup
Proceedings of the International Conference on Stellar Dynamics: From Classical to Modern,
St. Petersburg State University, edited by L.P. Ossipkov and I.I. Nikiforov, pp. 420 - 426 (2000)
( PostScript )( PDF )
Chaotic Mixing in Noisy Hamiltonian Systems
Henry E. Kandrup, Ilya V. Pogorelov, and Ioannis V. Sideris
Monthly Notices of the Royal Astronomical Society 311: 719-732 (2000)
( PostScript )( PDF )
Observation of plasma wakefield acceleration in the underdense regime
N. Barov and J. B. Rosenzweig
Physical Review Special Topics - Accelerators and Beams 3: 011301-1 - 011301-10 (2000)
( PostScript ) ( PDF )
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. Peble, M. Shinn, T. Siggins, R. Walker, and B. Yunn
Physical Review Letters 84: 662-665 (2000)
( PostScript ) ( PDF )
Diffraction Analysis of Coherent Transition Radiation Interferometry in
Electron Linear Accelerators
Tim Maxwell
Master of Science Thesis (2007)
( PDF )
Construction and Initial Characterization of a Low Energy Electron Source for
Electron Microscopy
Shafaq Moten
Master of Science Thesis (2007)
( PDF )
Impact of Photocathode Drive Laser Transverse Density Perturbation on a
High Charge Electron Beam Produced in a Photoinjector
Marwan M. Rihaoui
Master of Science Thesis (2007)
( PDF )
Application of Symmetry Theories to Design of Fragment Separators for Exotic Isotope Accelerators
James A. Maloney
Master of Science Thesis (2006)
( PDF )
The Accuracy of the Photometric Redshift of Galaxy Clusters
Elizabeth A. Holden
Master of Science Thesis (2006)
( PDF )
Chaos in Time-Dependent Space-Charge Potentials
Gregory T. Betzel
Master of Science Thesis (2005)
( PDF )
A Possible Cure of Phase Slip for a Nonlinear Plasma Wakefield Accelerator
Daniel S. Bollinger
Master of Science Thesis (2005)
Front Matter: (DOC) ; Main Body: (PDF )