Reduction of fast ion drag in the presence of ‘hollow’ non-Maxwellian electron distributions

IF 2.1 2区 物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS Plasma Physics and Controlled Fusion Pub Date : 2024-02-13 DOI:10.1088/1361-6587/ad238f
A P L Robinson
{"title":"Reduction of fast ion drag in the presence of ‘hollow’ non-Maxwellian electron distributions","authors":"A P L Robinson","doi":"10.1088/1361-6587/ad238f","DOIUrl":null,"url":null,"abstract":"It is argued that the electronic stopping power in a plasma should be expected to exhibit significant differences in the presence of effects that shift the electron distribution function away from a Maxwellian. This is potentially important for nuclear reactions produced by laser-driven ion beams, where non-Maxwellian effects may have to be considered. We have calculated the electronic stopping power for a number of model distributions. Importantly, comparisons with the Maxwellian are done under the condition of energy density parity. ‘Hollow’ electron distribution functions (e.g. <inline-formula>\n<tex-math><?CDATA $f \\propto v^nf_{\\text{max}}$?></tex-math>\n<mml:math overflow=\"scroll\"><mml:mi>f</mml:mi><mml:mo>∝</mml:mo><mml:msup><mml:mi>v</mml:mi><mml:mi>n</mml:mi></mml:msup><mml:msub><mml:mi>f</mml:mi><mml:mrow><mml:mtext>max</mml:mtext></mml:mrow></mml:msub></mml:math>\n<inline-graphic xlink:href=\"ppcfad238fieqn1.gif\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula>) could be expected to show a reduced stopping power (when <inline-formula>\n<tex-math><?CDATA $v_\\mathrm{i}/v_\\mathrm{t} \\lt 1$?></tex-math>\n<mml:math overflow=\"scroll\"><mml:msub><mml:mi>v</mml:mi><mml:mrow><mml:mi mathvariant=\"normal\">i</mml:mi></mml:mrow></mml:msub><mml:mrow><mml:mo>/</mml:mo></mml:mrow><mml:msub><mml:mi>v</mml:mi><mml:mrow><mml:mi mathvariant=\"normal\">t</mml:mi></mml:mrow></mml:msub><mml:mo>&lt;</mml:mo><mml:mn>1</mml:mn></mml:math>\n<inline-graphic xlink:href=\"ppcfad238fieqn2.gif\" xlink:type=\"simple\"></inline-graphic>\n</inline-formula>). We show that this is indeed the case and that the difference can become a factor of 70. The super-Gaussian electron distribution function, on the other hand, will always show a higher stopping power than the Maxwellian for orders greater than 2.","PeriodicalId":20239,"journal":{"name":"Plasma Physics and Controlled Fusion","volume":"5 1","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasma Physics and Controlled Fusion","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1088/1361-6587/ad238f","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, FLUIDS & PLASMAS","Score":null,"Total":0}
引用次数: 0

Abstract

It is argued that the electronic stopping power in a plasma should be expected to exhibit significant differences in the presence of effects that shift the electron distribution function away from a Maxwellian. This is potentially important for nuclear reactions produced by laser-driven ion beams, where non-Maxwellian effects may have to be considered. We have calculated the electronic stopping power for a number of model distributions. Importantly, comparisons with the Maxwellian are done under the condition of energy density parity. ‘Hollow’ electron distribution functions (e.g. fvnfmax ) could be expected to show a reduced stopping power (when vi/vt<1 ). We show that this is indeed the case and that the difference can become a factor of 70. The super-Gaussian electron distribution function, on the other hand, will always show a higher stopping power than the Maxwellian for orders greater than 2.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
在存在 "空心 "非麦克斯韦电子分布的情况下减少快速离子阻力
有观点认为,等离子体中的电子阻挡功率在电子分布函数偏离麦克斯韦效应的情况下应表现出显著差异。这对于激光驱动离子束产生的核反应可能非常重要,因为在这种情况下可能必须考虑非麦克斯韦效应。我们计算了一些模型分布的电子停止功率。重要的是,与麦克斯韦分布的比较是在能量密度奇偶性条件下进行的。空心 "电子分布函数(如f∝vnfmax)可能会显示出较低的停止功率(当vi/vt<1时)。我们的研究表明,情况确实如此,而且两者之间的差异可以达到 70 倍。另一方面,当阶数大于 2 时,超高斯电子分布函数总是比麦克斯韦电子分布函数显示出更高的停止功率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Plasma Physics and Controlled Fusion
Plasma Physics and Controlled Fusion 物理-物理:核物理
CiteScore
4.50
自引率
13.60%
发文量
224
审稿时长
4.5 months
期刊介绍: Plasma Physics and Controlled Fusion covers all aspects of the physics of hot, highly ionised plasmas. This includes results of current experimental and theoretical research on all aspects of the physics of high-temperature plasmas and of controlled nuclear fusion, including the basic phenomena in highly-ionised gases in the laboratory, in the ionosphere and in space, in magnetic-confinement and inertial-confinement fusion as well as related diagnostic methods. Papers with a technological emphasis, for example in such topics as plasma control, fusion technology and diagnostics, are welcomed when the plasma physics is an integral part of the paper or when the technology is unique to plasma applications or new to the field of plasma physics. Papers on dusty plasma physics are welcome when there is a clear relevance to fusion.
期刊最新文献
Reduced order modeling for real-time monitoring of structural displacements due to electromagnetic forces in large scale tokamaks He II line intensity measurements in the JET tokamak Sheath constraints on turbulent magnetised plasmas Vertical instability forecasting and controllability assessment of multi-device tokamak plasmas in DECAF with data-driven optimization Identifying L-H transition in HL-2A through deep learning
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1