{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1363388844358200704.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1063/1.870563"}},{"identifier":{"@type":"URI","@value":"https://pubs.aip.org/aip/pop/article-pdf/1/1/109/19142408/109_1_online.pdf"}}],"dc:title":[{"@value":"Effect of electron collisions on ion-acoustic waves and heat flow"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The damping rate of ion-acoustic waves in a plasma is calculated by numerically solving the electron Fokker–Planck and cold-ion fluid equations for arbitrary electron collisionality kλei and charge number Z. The damping rate reaches a maximum at kλei∼(Zme/mi)1/2, as predicted by fluid theory, but then remains above fluid-theory predictions for kλei≳(Zme/mi)1/2. This enhancement is most significant for high-Z plasmas, where the thermalization due to electron–electron (e–e) collisions is least effective. For kλei≫1, the damping approaches the collisionless Landau limit. The isotropic-Rosenbluth-potential approximation for e–e collisions gives rise to errors of up to 10% in the damping rates. A further approximation that involves adjusting the e–i angular scattering collision strength to simulate the contribution from e–e collisions is found to be similarly accurate. In the high-Z limit, there is a strong reduction in the effective thermal conductivity κ relative to the classical Spitzer–Härm value κSH for kλei≳10−4. For low-Z plasmas, this reduction only becomes significant for kλei≳10−2. By introducing a spatially modulated inverse-bremsstrahlung heating source and solving for the steady-state distribution function, a further reduction in the value of κ/κSH is obtained.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383388844358200704","@type":"Researcher","foaf:name":[{"@value":"E. M. Epperlein"}],"jpcoar:affiliationName":[{"@value":"Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"1070664X"},{"@type":"EISSN","@value":"10897674"}],"prism:publicationName":[{"@value":"Physics of Plasmas"}],"dc:publisher":[{"@value":"AIP Publishing"}],"prism:publicationDate":"1994-01-01","prism:volume":"1","prism:number":"1","prism:startingPage":"109","prism:endingPage":"115"},"reviewed":"false","url":[{"@id":"https://pubs.aip.org/aip/pop/article-pdf/1/1/109/19142408/109_1_online.pdf"}],"createdAt":"2002-07-26","modifiedAt":"2024-02-05","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390282681490693760","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Nonlocal Transport Phenomena and Various Structure Formations in Plasmas. Nonlocal Transport in Laser Implosion and Supernova Explosion."},{"@language":"ja","@value":"プラズマの非局所輸送現象と様々な構造形成　２．　　レーザー爆縮および超新星爆発における非局所輸送"},{"@value":"レーザー爆縮および超新星爆発における非局所輸送"},{"@language":"ja-Kana","@value":"レーザーバクシュク オヨビ チョウシンセイ バクハツ ニ オケル ヒキョクショ ユソウ"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1063/1.870563"},{"@type":"CROSSREF","@value":"10.1585/jspf.78.861_references_DOI_8sYVeoNo89955wu9vbq7jDgoh60"}]}