Computational Methods in the Warp Code Framework for Kinetic Simulations of Particle Beams and Plasmas

Friedman, A.; Cohen, R. H.; Grote, D.P.; Lund, Steven M.; Sharp, W.M.; Vay, Jean‐Luc; Haber, I.; Kishek, R. A.

doi:10.1109/tps.2014.2308546

Cited by 60 publications

(36 citation statements)

References 47 publications

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“…Warp [6], [7] is an advanced particle-in-cell (PIC) simulation framework that supports a broad range of electrostatic and electromagnetic field solvers; a variety of geometries (3-D x,y,z; 2-D r,z; 2-D x,y); the use of "warped" coordinates for bent beam lines (hence the name Warp); Adaptive Mesh Refinement (AMR); models for particle interactions with gas and walls; Lorentz-boosted frame solver, and many other advanced features. Warp has a broad range of applications, including modeling of laser-based electron and ion acceleration, non-neutral plasmas in traps, or stray "electron clouds" in accelerators.…”

Section: Warpmentioning

confidence: 99%

WarpIV: In Situ Visualization and Analysis of Ion Accelerator Simulations

Rübel

Loring

Vay

et al. 2016

IEEE Comput. Grap. Appl.

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The generation of short pulses of ion beams through the interaction of an intense laser with a plasma sheath offers the possibility of compact and cheaper ion sources for many applications; from fast ignition and radiography of dense targets to hadron therapy and injection into conventional accelerators. To enable the efficient analysis of large-scale, high-fidelity particle accelerator simulations using the Warp simulation suite, we introduce the Warp In situ Visualization Toolkit (WarpIV). WarpIV integrates state-of-the-art in situ visualization and analysis using VisIt with Warp, supports management and control of complex in situ visualization and analysis workflows, and implements integrated analytics to facilitate query and feature-based data analytics and efficient large-scale data analysis. WarpIV enables for the first time distributed parallel, in situ visualization of the full simulation data using highperformance compute resources as the data is being generated by Warp. We describe the application of WarpIV to study and compare large 2D and 3D ion accelerator simulations, demonstrating significant differences in the acceleration process in 2D and 3D simulations. WarpIV is available to the public via https://bitbucket.org/berkeleylab/warpiv . IEEE CG&A, SPECIAL ISSUE ON HIGH PERFORMANCE VISUALIZATION AND ANALYSIS, SEPTEMBER 2015 1In situ Visualization and Analysis of Ion Accelerator Simulations using Warp and VisIt Oliver Rübel*, Burlen Loring*, Jean-Luc Vay, David P. Grote, Remi Lehe, Stepan Bulanov, Henri Vincenti, and E .Wes Bethel Abstract-The generation of short pulses of ion beams through the interaction of an intense laser with a plasma sheath offers the possibility of compact and cheaper ion sources for many applications; from fast ignition and radiography of dense targets to hadron therapy and injection into conventional accelerators. To enable the efficient analysis of large-scale, high-fidelity particle accelerator simulations using the Warp simulation suite, we introduce the Warp In situ Visualization Toolkit (WarpIV). WarpIV integrates state-of-the-art in situ visualization and analysis using VisIt with Warp, supports management and control of complex in situ visualization and analysis workflows, and implements integrated analytics to facilitate query and feature-based data analytics and efficient large-scale data analysis.

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Section: Warpmentioning

confidence: 99%

WarpIV: In Situ Visualization and Analysis of Ion Accelerator Simulations

Rübel

Loring

Vay

et al. 2016

IEEE Comput. Grap. Appl.

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“…Table I 5 summarizes the beam size and emittance at maximum focusing for a variety of foil thicknesses. Plots of particlein-cell simulation results obtained from WARP [17] (see Sec. IV) are also included in Fig.…”

Section: E Example: Application Of the Envelope Model To Intense Promentioning

confidence: 99%

“…The envelope model is compared to particle-in-cell simulations using the WARP code [17] in axisymmetric cylindrical (r − z) geometry with a regular grid. The basic simulation model is also discussed in Ref.…”

Section: Simulationsmentioning

confidence: 99%

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Scattering effects in passive foil focusing of ion beams

Yuen

Lund

Barnard

et al. 2015

Phys. Rev. ST Accel. Beams

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A stack of thin, closely spaced conducting foils has been investigated by Lund et al. [Phys. Rev. ST Accel. Beams 16, 044202 (2013)] as a passive focusing lens for intense ion beams. The foils mitigate spacecharge defocusing forces to enable the beam self-magnetic field to focus. In this study, we analyze possible degradation of focusing due to scattering of beam ions resulting from finite foil thickness using an envelope model and numerical simulations with the particle-in-cell code WARP. Ranges of kinetic energy where scattering effects are sufficient to destroy passive focusing are quantified. The scheme may be utilized to focus protons produced in intense laser-solid accelerator schemes. As an example, the spot size of an initially collimated 30 MeV proton beam with initial rms radius 200 μm, perveance Q ¼ 1.8 × 10 −2 , and initial transverse emittance ε x;rms ¼ 0.87 mm mrad propagating through a stack of 6.4 μm thick foils, spaced 100 μm apart, gives a 127.5 μm spot with scattering and a 81.0 μm spot without scattering, illustrating the importance of including scattering effects.

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“…Warp, PIConGPU and Smilei [4][5][6] can be mentioned specially: all of them are professionally developed and overall of very high quality. Unfortunately, while source code of these programs is open, it seems that massive changes in the architecture would be required to incorporate certain necessary features.…”

Section: Introductionmentioning

confidence: 99%

Ef: Software for Nonrelativistic Beam Simulation by Particle-in-Cell Algorithm

Boytsov

Bulychev

2018

EPJ Web Conf.

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Abstract. Understanding of particle dynamics is crucial in construction of electron guns, ion sources and other types of nonrelativistic beam devices. Apart from external guiding and focusing systems, a prominent role in evolution of such low-energy beams is played by particle-particle interaction. Numerical simulations taking into account these effects are typically accomplished by a well-known particle-in-cell method. In practice, for convenient work a simulation program should not only implement this method, but also support parallelization, provide integration with CAD systems and allow access to details of the simulation algorithm. To address the formulated requirements, development of a new open source code -Ef -has been started. It's current features and main functionality are presented. Comparison with several analytical models demonstrates good agreement between the numerical results and the theory. Further development plans are discussed.

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Computational Methods in the Warp Code Framework for Kinetic Simulations of Particle Beams and Plasmas

Cited by 60 publications

References 47 publications

WarpIV: In Situ Visualization and Analysis of Ion Accelerator Simulations

WarpIV: In Situ Visualization and Analysis of Ion Accelerator Simulations

Scattering effects in passive foil focusing of ion beams

Ef: Software for Nonrelativistic Beam Simulation by Particle-in-Cell Algorithm

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