ICAP 2006 - List of Authors (Ryne, R. D.)

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Ryne, R. D.

Paper	Title	Page
TUAPMP03	Recent Progress on the MaryLie/IMPACT Beam Dynamics Code	157
	R. D. Ryne, E. W. Bethel, I. V. Pogorelov, J. Qiang, J. M. Shalf, C. Siegerist, M. Venturini LBNL, Berkeley, California D. T. Abell Tech-X, Boulder, Colorado A. Adelmann PSI, Villigen J. F. Amundson, P. Spentzouris Fermilab, Batavia, Illinois A. Dragt University of Maryland, College Park, Maryland C. Mottershead, N. Neri, P. L. Walstrom LANL, Los Alamos, New Mexico V. Samulyak BNL, Upton, Long Island, New York
	Funding: Supported in part by the US DOE, Office of Science, SciDAC program; Office of High Energy Physics; Office of Advanced Scientific Computing Research MaryLie/IMPACT (ML/I) is a 3D parallel Particle-In-Cell code that combines the nonlinear optics capabilities of MaryLie 5.0 with the parallel particle-in-cell space-charge capability of IMPACT. In addition to combining the capabilities of these codes, ML/I has a number of powerful features, including a choice of Poisson solvers, a fifth-order rf cavity model, multiple reference particles for rf cavities, a library of soft-edge magnet models, representation of magnet systems in terms of coil stacks with possibly overlapping fields, and wakefield effects. The code allows for map production, map analysis, particle tracking, and 3D envelope tracking, all within a single, coherent user environment. ML/I has a front end that can read both MaryLie input and MAD lattice descriptions. The code can model beams with or without acceleration, and with or without space charge. Developed under a US DOE Scientific Discovery through Advanced Computing (SciDAC) project, ML/I is well suited to large-scale modeling, simulations having been performed with up to 100M macroparticles. ML/I uses the H5Part* library for parallel I/O. The code inherits the powerful fitting/optimizing capabilities of MaryLie, augmented for the new features of ML/I. The combination of soft-edge magnet models, high-order capability, and fitting/optimization, makes it possible to simultaneously remove third-order aberrations while minimizing fifth-order, in systems with overlapping, realistic magnetic fields. Several applications will be presented, including aberration correction in a magnetic lens for radiography, linac and beamline simulations of an e-cooling system for RHIC, design of a matching section across the transition of a superconducting linac, and space-charge tracking in the damping rings of the International Linear Collider. *ICAP 2006 paper ID 1222, A. Adelmann et al., "H5Part: A Portable High Performance Parallel Data Interface for Electromagnetics Simulations"
	Slides
WEPPP01	Recent Developments in IMPACT and Application to Future Light Sources	182
	I. V. Pogorelov, J. Qiang, R. D. Ryne, M. Venturini, A. Zholents LBNL, Berkeley, California R. L. Warnock SLAC, Menlo Park, California
	The Integrated Map and Particle Accelerator Tracking (IMPACT) code suite was originally developed to model beam dynamics in ion linear accelerators. It has been greatly enhanced and now includes a linac design code, a 3D rms envelope code and two parallel particle-in-cell (PIC) codes IMPACT-T, a time-based code, and IMPACT-Z, a z-coordinate based code. Presently, the code suite has been increasingly used in simulations of high brightness electron beams for future light sources. These simulations, performed using up to 100 million macroparticles, include effects related to nonlinear magnetic optics, rf structure wake fields, 3D self-consistent space charge, and coherent synchrotron radiation (at present a 1D model). Illustrations of application for a simulation of the microbunching instability are given. We conclude with plans of further developments pertinent to future light sources.
WEPPP02	Recent Improvements to the IMPACT-T Parallel Particle Tracking Code	185
	J. Qiang, I. V. Pogorelov, R. D. Ryne LBNL, Berkeley, California
	Funding: Supported in part by the US DOE, Office of Science, SciDAC program; Office of High Energy Physics; Office of Advanced Scientific Computing Research The IMPACT-T code is a parallel three-dimensional quasi-static beam dynamics code for modeling high brightness beams in photoinjectors and RF linacs. Developed under the US DOE Scientific Discovery through Advanced Computing (SciDAC) program, it includes several key features including a self-consistent calculation of 3D space-charge forces using a shifted and integrated Green function method, multiple energy bins for a beams with large energy spread, and models for treating RF standing wave and traveling wave structures. In this paper, we report on recent improvements to the IMPACT-T code including short-range transverse and longitudinal wakefield models and a longitudinal CSR wakefield model. Some applications will be presented including simulation of the photoinjector for the Linac Coherent Light Source (LCLS) and beam generation from a nano-needle photocathode.