Fundamental Plasma Physics最新文献_第5页

Symmetric Compton Scattering: A way towards plasma heating and tunable mono-chromatic gamma-rays 对称康普顿散射：一种实现等离子体加热和可调谐单色伽马射线的方法

Fundamental Plasma Physics Pub Date : 2023-10-01 DOI: 10.1016/j.fpp.2023.100026

L. Serafini , A. Bacci , C. Curatolo , I. Drebot , V. Petrillo , A. Puppin , M. Rossetti Conti , S. Samsam

{"title":"Symmetric Compton Scattering: A way towards plasma heating and tunable mono-chromatic gamma-rays","authors":"L. Serafini , A. Bacci , C. Curatolo , I. Drebot , V. Petrillo , A. Puppin , M. Rossetti Conti , S. Samsam","doi":"10.1016/j.fpp.2023.100026","DOIUrl":"https://doi.org/10.1016/j.fpp.2023.100026","url":null,"abstract":"<div><p>This paper explores the transition between Compton Scattering and Inverse Compton Scattering (ICS), which is characterized by an equal exchange of energy and momentum between the colliding particles (electrons and photons). This regime has been called Symmetric Compton Scattering (SCS) and has the unique property of eliminating the energy-angle correlation of scattered photons, and, when the electron recoil is large, transferring monochromaticity from one colliding beam to the other, resulting in back-scattered photon beams that are intrinsically monochromatic. The paper suggests that large-recoil SCS or quasi-SCS can be used to design compact intrinsic monochromatic <em>γ</em>-ray sources based on compact linacs, thus avoiding the use of GeV-class electron beams together with powerful laser/optical systems as those typically required for ICS sources. Furthermore, at low recoil and low energy collisions (in the 10 keV energy range), SCS can be exploited to heat the colliding electron beam, which is widely scattered with large transverse momenta over the entire solid angle, offering a technique to trap electrons into magnetic bottles for plasma heating.</p></div>","PeriodicalId":100558,"journal":{"name":"Fundamental Plasma Physics","volume":"7 ","pages":"Article 100026"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50203527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A D-3He fusion reactor for the mitigation of global warming 用于减缓全球变暖的D-3He聚变反应堆

Fundamental Plasma Physics Pub Date : 2023-08-01 DOI: 10.1016/j.fpp.2023.100022

E. Mazzucato

{"title":"A D-3He fusion reactor for the mitigation of global warming","authors":"E. Mazzucato","doi":"10.1016/j.fpp.2023.100022","DOIUrl":"https://doi.org/10.1016/j.fpp.2023.100022","url":null,"abstract":"<div><p>Since a fusion reactor using the Deuterium-Tritium fuel cycle cannot be a source of clean energy because of the deleterious effects of energetic neutrons carrying 80% of the energy output, and it is very doubtful that it will be able to achieve Tritium self-sufficiency because of an extremely problematic and still unproven breeding procedure, this paper proposes a new reactor scheme capable of confining hot and dense plasmas using the Deuterium – Helium-3 fuel cycle. Such a reactor must be considered a source of clean energy because of its very low level of neutrons production, and its fuel is available in large quantity since we can get the needed Deuterium from seawater and likewise Helium-3 from the moon, as it was found from the samples of lunar soil brought back by the astronauts of the Apollo Mission. The proposed reactor consists of two 100 m long cylindrical plasmas, connected by semicircular sections to form a racetrack configuration. It should be capable of producing from 16 to 20 GW of fusion power when operating with an electron density of 3 × 10<sup>20</sup> m<sup>−3</sup>, a magnetic field of 10 T and average temperatures from 40 to 45 keV. Out of this power, up to 10 GW will be used for replacing the loss of electron energy from bremsstrahlung radiation, with a consequent reduction in the reactor power output. However, such a loss could be mitigated by a partial recovery of the energy plasma radiation.</p></div>","PeriodicalId":100558,"journal":{"name":"Fundamental Plasma Physics","volume":"6 ","pages":"Article 100022"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50204580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Collisionless relativistic magnetic reconnection driven by electron vortices in laser-plasma interaction 激光等离子体相互作用中电子涡旋驱动的无碰撞相对论性磁重联

Fundamental Plasma Physics Pub Date : 2023-08-01 DOI: 10.1016/j.fpp.2023.100018

Yan-Jun Gu , Kirill V. Lezhnin , Sergei V. Bulanov

引用次数: 0

Shaping the edge radial electric field to create shearless transport barriers in tokamaks 整形边缘径向电场以在托卡马克中产生无剪切传输势垒

Fundamental Plasma Physics Pub Date : 2023-08-01 DOI: 10.1016/j.fpp.2023.100023

L.A. Osorio-Quiroga , M. Roberto , I.L. Caldas , R.L. Viana , Y. Elskens

{"title":"Shaping the edge radial electric field to create shearless transport barriers in tokamaks","authors":"L.A. Osorio-Quiroga , M. Roberto , I.L. Caldas , R.L. Viana , Y. Elskens","doi":"10.1016/j.fpp.2023.100023","DOIUrl":"https://doi.org/10.1016/j.fpp.2023.100023","url":null,"abstract":"<div><p>In tokamak-confined plasmas, particle transport can be reduced by modifying the radial electric field. In this paper, we investigate the influence of both a well-like and a hill-like shaped radial electric field profile on the creation of shearless transport barriers (STBs) at the plasma edge, which are a type of barrier that can prevent chaotic transport and are related to the presence of extreme values in the rotation number profile. For that, we apply an <span><math><mrow><mi>E</mi><mo>×</mo><mi>B</mi></mrow></math></span> drift model to describe test particle orbits in large aspect-ratio tokamaks. We show how these barriers depend on the electrostatic fluctuation amplitudes and on the width and depth (height) of the radial electric field well-like (hill-like) profile. We find that, as the depth (height) increases, the STB at the plasma edge becomes more resistant to fluctuations, enabling access to an improved confinement regime that prevents chaotic transport. We also present parameter spaces with the radial electric field parameters, indicating the STB existence for several electric field configurations at the plasma edge, for which we obtain a fractal structure at the barrier/non-barrier frontier, typical of quasi-integrable Hamiltonian systems.</p></div>","PeriodicalId":100558,"journal":{"name":"Fundamental Plasma Physics","volume":"6 ","pages":"Article 100023"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50204581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vertical displacements close to ideal-MHD marginal stability in tokamak plasmas 托卡马克等离子体中接近理想MHD边缘稳定性的垂直位移

Fundamental Plasma Physics Pub Date : 2023-06-01 DOI: 10.1016/j.fpp.2023.100017

F. Porcelli , T. Barberis , A. Yolbarsop

引用次数: 0

A Hamiltonian and geometric formulation of general Vlasov-Maxwell-type models 一般Vlasov-Maxwell型模型的哈密顿量和几何公式

Fundamental Plasma Physics Pub Date : 2023-06-01 DOI: 10.1016/j.fpp.2023.100016

William Barham , Philip J. Morrison , Eric Sonnendrücker

引用次数: 0

Formation and Ejection of Helical Plasma Structures from Gravitational Wave Emitters 引力波发射器螺旋等离子体结构的形成和喷射

Fundamental Plasma Physics Pub Date : 2023-04-01 DOI: 10.1016/j.fpp.2022.100007

B. Coppi

{"title":"Formation and Ejection of Helical Plasma Structures from Gravitational Wave Emitters","authors":"B. Coppi","doi":"10.1016/j.fpp.2022.100007","DOIUrl":"https://doi.org/10.1016/j.fpp.2022.100007","url":null,"abstract":"<div><p>Helical plasma structures have been identified and shown to form in and propagate from the high density plasmas in which Black Hole binaries can be imbedded. These structures are envisioned to extend to very low density and distant plasma regions up to where they can be disrupted by encountering plasma patches where the waves, of which the structures are composed, become dissipated. By now experimental observations and analyses of the morphology of jets have found that they can involve double-helix magnetic topologies in one case and, more recently, a single helix in other cases. Thus, plasma structures originating in the plasmas surrounding binary systems are proposed, instead of particle beams emitted by black holes directly, as a possible explanation of the origin of the highly collimated jets associated with a variety of celestial objects that are currently observed. Theoretically, double-helix structures are found to emerge as non-linearly coupled torsional ion-sound waves which, in the presence of a background magnetic field, in both the formation and terminal plasmas generate helical magnetic field configurations while remaining nearly “electrostatic” in regions where no significant background magnetic field is present. These (helical) structures can propagate independently in either of the two vertical directions. The coupling involves Intrinsic Gravitational Modes originating in the circumbinary disk and Inner Gravitational Fluctuations emerging from the Swept (Toroidal) Regions carved, within the highest density plasma region, by one or both Black Holes.</p></div>","PeriodicalId":100558,"journal":{"name":"Fundamental Plasma Physics","volume":"4 ","pages":"Article 100007"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50203975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Observation of poloidal magnetic flux emission from the post-pinch phase of a plasma focus and its significance for laboratory simulation of astrophysical jets 等离子体焦点后箍缩阶段极向磁通发射的观测及其对天体物理喷流实验室模拟的意义

Fundamental Plasma Physics Pub Date : 2023-04-01 DOI: 10.1016/j.fpp.2023.100012

S.K.H. Auluck , A.B. Blagoev

{"title":"Observation of poloidal magnetic flux emission from the post-pinch phase of a plasma focus and its significance for laboratory simulation of astrophysical jets","authors":"S.K.H. Auluck , A.B. Blagoev","doi":"10.1016/j.fpp.2023.100012","DOIUrl":"https://doi.org/10.1016/j.fpp.2023.100012","url":null,"abstract":"<div><p>Astrophysical jets are plasma flows, which are observed to substantially maintain their transverse size while travelling distances orders-of-magnitude larger. They are found in many astrophysical contexts, spanning several decades in energy and size, suggesting operation of an underlying scale-invariant mechanism. Similar phenomena observed in laboratory plasmas are often studied as surrogate models for astrophysical jets under the conjecture that the scale-invariance of that as-yet-unconfirmed mechanism continues to hold down to laboratory spatial and energy scales. The plasma focus is one such laboratory plasma device which offers the advantage of diagnostic accessibility at a relatively modest resource cost. The present paper uses the plasma focus to address one of the intriguing aspects of the astrophysical jet phenomenon. Theoretical models of astrophysical jets require presence of a poloidal magnetic flux but there is no observational basis for assuming its existence. Indeed, there is a fundamental theoretical impossibility of existence of poloidal magnetic flux in the natural symmetry of the jet phenomena about its axis in the context of magnetohydrodynamics. The next best evidence in support of the poloidal magnetic flux hypothesis of such theoretical models would be to look for it in surrogate experimental simulations of astrophysical jets. In this context, this paper demonstrates a new diagnostic method for detection of poloidal magnetic flux emission from a plasma focus. The results indicate that poloidal magnetic flux continues to be emitted even after the disruption of the plasma focus pinch phase and shows evidence of its being decoupled from the externally supplied discharge current. This observation is interpreted along with previous knowledgebase in terms of a conjecture regarding the scale-invariant mechanism that might also be involved in astrophysical jet phenomena.</p></div>","PeriodicalId":100558,"journal":{"name":"Fundamental Plasma Physics","volume":"4 ","pages":"Article 100012"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50203973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Exact expression for the hot plasma conductivity kernel in configuration space 组态空间中热等离子体电导率核的精确表达式

Fundamental Plasma Physics Pub Date : 2023-02-01 DOI: 10.1016/j.fpp.2023.100008

Mike Machielsen , Joey Rubin , Jonathan Graves

引用次数: 0

Map of suprathermal onto nonextensive parameters describing Langmuir waves 描述Langmuir波的超热到非扩展参数的映射

Fundamental Plasma Physics Pub Date : 2023-02-01 DOI: 10.1016/j.fpp.2022.100006

F.E.M. Silveira , M.H. Benetti

引用次数: 1