A5054586287- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Gyrotron and Vacuum Electronics Research
- Numerical methods for differential equations
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Matrix Theory and Algorithms
- Geophysics and Sensor Technology
- Electromagnetic Simulation and Numerical Methods
- Nuclear Physics and Applications
- Fault Detection and Control Systems
- Electron and X-Ray Spectroscopy Techniques
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Semiconductor materials and devices
- Reservoir Engineering and Simulation Methods
- Medical Imaging Techniques and Applications
- Laser-Matter Interactions and Applications
- Optical Systems and Laser Technology
- Physics of Superconductivity and Magnetism
- Laser Design and Applications
- Quantum chaos and dynamical systems
RadiaSoft (United States)
2017-2023
Brookhaven National Laboratory
1999-2016
Tech-X Corporation (United States)
2005-2016
Tech-X (United Kingdom)
2011
University of Colorado Boulder
2005
RIKEN BNL Research Center
2002
University of Maryland, College Park
1988-1992
This paper summarizes the low-loss design for Spallation Neutron Source accumulator ring [``Spallation Design Manual'' (unpublished)]. A hybrid lattice consisting of FODO arcs and doublet straights provides optimum matching flexibility injection collimation. For this lattice, optimization focuses on six goals: a space-charge tune shift low enough (below 0.15) to avoid strong resonances, adequate transverse momentum acceptance efficient beam collimation, optimized desired target shape minimal...
Abstract X-ray beamlines are essential components of all synchrotron light sources. Practical operations involve frequent variation in beamline component positions and orientation, particularly when photon beam parameters shift due to experimental needs, or variations the incoming beam. The alignment process can be time consuming takes away from valuable for data collection. We describe progress automation certain tasks on tender-energy spectroscopy (TES) at National Synchrotron Light Source...
Modern map-based accelerator beam-dynamics codes model magnetic elements so as to include nonlinear effects and realistic fringe fields, but they persist in modeling rf cavities either energy kicks or linear maps. This work presents a method for including the of code.
We report progress on the R&D program for electron-cooling of Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon at storage energy using 54 MeV electrons. The source will be a superconducting RF photocathode gun. accelerator recovery linac. frequency set 703.75 MHz. maximum bunch 9.38 MHz, with charge 20 nC. has following components: photoinjector and its photocathode, linac cavity, start-to-end beam dynamics magnetized electrons, cooling...
Synchrotron beamline alignment is often a cumbersome and time-intensive task due to the many degrees of freedom high sensitivity misalignment each optical element. We develop an online learning model for autonomous optimization parameters using data collected from Tender Energy X-ray Absorption Spectroscopy (TES) at National Light Source-II (NSLS-II). test several methods, discuss effectiveness approach, as well their application different problems benchmarks performance. also practical...
Fundamental advances in experimental nuclear physics will require ion beams with orders of magnitude luminosity increase and temperature reduction. One the most promising particle accelerator techniques for achieving these goals is electron cooling, where beam repeatedly transfers thermal energy to a copropagating beam. The dynamical friction force on fully ionized gold moving through magnetized unmagnetized distributions has been simulated, using molecular dynamics that resolve close binary...
The physics interest in a luminosity upgrade of RHIC requires the development cooling-frontier facility. Detailed calculations were made electron cooling stored beams. This has been followed by beam dynamics simulations to establish feasibility creating necessary beam. accelerator will be superconducting Energy Recovery Linac (ERL). An intensive experimental R&D program engages various elements accelerator, as described 24 contributions 2007 PAC.
Accurate spin tracking is a valuable tool for understanding dynamics in particle accelerators and can help improve the performance of an accelerator. In this paper, we present detailed discussion integrators code gpuSpinTrack. We have implemented orbital based on drift-kick, bend-kick, matrix-kick splits. On top integrators, various motion. These use quaternions Romberg quadratures to accelerate both computation convergence rotations. evaluate their accuracy quantitative detail individual...
Abstract We present the initial results of a proof-of-concept ‘smart alarm’ for Continuous Electron Beam Accelerator Facility injector beamline at Jefferson Lab. To minimize machine downtime and improve operational efficiency, an autonomous alarm system able to identify diagnose unusual states is needed. Our approach leverages trained neural network capable alerting operators (a) when anomalous condition exists in (b) identifying element setting that root cause. The tool based on inverse...
High intensity proton linacs and storage rings are central for the development of advanced neutron sources, extending frontier in high energy physics, as drivers production pions neutrino factories or muon colliders, transmutation radioactive waste. Such beams not attainable using conventional linear lattices. It has been shown single particle limit that integrable nonlinear lattices permit much larger tune spreads than lattices, which would mitigate many space charge restrictions intensity....
Computational accelerator physics has changed and broadened over the last decade or so. Part of change is due to advent multiple ways parallel computing. Another part comes from algorithmic developments. The computing include distributed memory parallelism on-chip parallelism, with latter coming architectures (CPU GPU) having processing elements (cores streaming multiprocessors) wide vector (SIMD) instruction units. basics these new their application computational are briefly reviewed....
Depolarization response for a system of two orthogonal snakes at irrational tunes is studied in depth using lattice independent spin integration. In particular we consider the effect overlapping resonances this system, to understand impact phase, tune, relative location and threshold strengths resonances. These results are benchmarked compared dimensional direct tracking RHIC e-lens standard lattice. Finally longitudinal motion via chromatic scans six tracking.
Tracking simulations remain the essential tool for evaluating how multipolar imperfections in ring magnets restrict domain of stable phase-space motion. In Large Hadron Collider (LHC) at CERN, particles circulate injection energy, when multipole errors are most significant, more than ${10}^{7}$ turns, but systematic tracking studies limited to a small fraction this total time---even on modern computers. A considerable speedup is expected by replacing element-by-element with use symplectified...
A proposed luminosity upgrade to RHIC includes a novel electron cooling section, which would use ∼55 MeV electrons cool fully‐ionized 100 GeV/nucleon gold ions. High‐current bunched beams are required for the cooler, resulting in very high transverse temperatures and relatively low values magnetized logarithm. The accuracy of analytical formulae this regime requires careful examination. Simulations friction coefficient, using VORPAL code, single ions passing once through interaction region,...
SciDAC has had a major impact on computational beam dynamics and the design of particle accelerators. Particle accelerators—which account for half facilities in DOE Office Science Facilities Future 20 Year Outlook—are crucial US scientific, industrial, economic competitiveness. Thanks to SciDAC, accelerator calculations that were once thought impossible are now carried routinely, new challenging important within reach. modeling codes being used get most science out existing facilities,...
Symplectic integrators for Hamiltonian systems have been quite successful studying few-body dynamical systems. These are frequently derived using a formalism built on symplectic maps. There recent efforts to extend the approach plasmas, which focused primarily discrete Lagrangian mechanics. In this paper, we derive electromagnetic macroparticle algorithm map formalism. The resulting is designed prevent numerical instabilities such as Čerenkov, result from incorrect dispersion relations...
As the size and cost of particle accelerators escalate, high-performance computing plays an increasingly important role; optimization through accurate, detailed computermodeling increases performance reduces costs. But consequently, computer simulations face enormous challenges. Early approximation methods, such as expansions in distance from design orbit, were unable to supply accurate results, computation wake fields complex cavities. Since advent message-passing supercomputers with...