DC Field | Value | Language |
---|---|---|
dc.contributor.author | Na, D.-Y. | - |
dc.contributor.author | Nicolini, J.L. | - |
dc.contributor.author | Lee, R. | - |
dc.contributor.author | Borges, B.-H.V. | - |
dc.contributor.author | Omelchenko, Y.A. | - |
dc.contributor.author | Teixeira, F.L. | - |
dc.date.accessioned | 2022-10-04T09:50:06Z | - |
dc.date.available | 2022-10-04T09:50:06Z | - |
dc.date.created | 2022-09-05 | - |
dc.date.issued | 2020-02 | - |
dc.identifier.issn | 0021-9991 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/113870 | - |
dc.description.abstract | Numerical Cherenkov radiation (NCR) or instability is a detrimental effect frequently found in electromagnetic particle-in-cell (EM-PIC) simulations involving relativistic plasma beams. NCR is caused by spurious coupling between electromagnetic-field modes and multiple beam resonances. This coupling may result from the slow down of poorly-resolved waves due to numerical (grid) dispersion and from aliasing mechanisms. NCR has been studied in the past for finite-difference-based EM-PIC algorithms on regular (structured) meshes with rectangular elements. In this work, we extend the analysis of NCR to finite-element-based EM-PIC algorithms implemented on unstructured meshes. The influence of different mesh element shapes and mesh layouts on NCR is studied. Analytic predictions are compared against results from finite-element-based EM-PIC simulations of relativistic plasma beams on various mesh types. | - |
dc.language | English | - |
dc.publisher | Academic Press | - |
dc.relation.isPartOf | Journal of Computational Physics | - |
dc.title | Diagnosing numerical Cherenkov instabilities in relativistic plasma simulations based on general meshes | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.jcp.2019.108880 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Journal of Computational Physics, v.402, pp.108880 | - |
dc.identifier.wosid | 000503387600014 | - |
dc.citation.startPage | 108880 | - |
dc.citation.title | Journal of Computational Physics | - |
dc.citation.volume | 402 | - |
dc.contributor.affiliatedAuthor | Na, D.-Y. | - |
dc.identifier.scopusid | 2-s2.0-85074127108 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | FINITE-ELEMENT-METHOD | - |
dc.subject.keywordPlus | LASER WAKEFIELD ACCELERATORS | - |
dc.subject.keywordPlus | TIME-DOMAIN | - |
dc.subject.keywordPlus | UNSTRUCTURED GRIDS | - |
dc.subject.keywordPlus | MAXWELL EQUATIONS | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | DISCRETIZATION | - |
dc.subject.keywordPlus | DISPERSION | - |
dc.subject.keywordPlus | ALGORITHM | - |
dc.subject.keywordPlus | RADIATION | - |
dc.subject.keywordAuthor | Particle-in-cell | - |
dc.subject.keywordAuthor | Numerical Cherenkov radiation | - |
dc.subject.keywordAuthor | Finite element method | - |
dc.subject.keywordAuthor | Plasmas | - |
dc.relation.journalWebOfScienceCategory | Computer Science, Interdisciplinary Applications | - |
dc.relation.journalWebOfScienceCategory | Physics, Mathematical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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