Contributions to Plasma Physics最新文献

{"title":"SOL impurity transport analysis with SONIC code with a kinetic effect on a thermal force transport model in JT-60U","authors":"M. Kobayashi,&nbsp;S. Yamoto,&nbsp;K. Hoshino,&nbsp;N. Asakura,&nbsp;Y. Homma,&nbsp;N. Aiba,&nbsp;T. Nakano,&nbsp;R. Sano,&nbsp;G. Kawamura,&nbsp;Y. Hayashi","doi":"10.1002/ctpp.202300141","DOIUrl":"10.1002/ctpp.202300141","url":null,"abstract":"<p>The latest version of the SONIC code with the extended thermal force model that is capable to treat collisionality dependence of the force has been applied to the interpretative simulation of L-mode discharge of JT-60 U to investigate the impact of kinetic correction of the thermal force on the scrape-off layer (SOL) plasma properties. As a first attempt, we have selected an L-mode attached discharge #39090 (<i>I</i>_p = 1.6 MA, <i>B</i>_t = 3.1 T, and <i>P</i>_NBI = 4.5 MW), where <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mover>\u0000 <mi>n</mi>\u0000 <mo>‾</mo>\u0000 </mover>\u0000 <mi>e</mi>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {overline{n}}_e $$</annotation>\u0000 </semantics></math> = 2.08 × 10¹⁹ m⁻³, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mover>\u0000 <mi>n</mi>\u0000 <mo>‾</mo>\u0000 </mover>\u0000 <mi>e</mi>\u0000 </msub>\u0000 <mo>/</mo>\u0000 <msub>\u0000 <mi>n</mi>\u0000 <mi>Gr</mi>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {overline{n}}_e/{n}_{Gr} $$</annotation>\u0000 </semantics></math> = 0.392 with deuterium plasmas. It has been found that the peak values of SOL impurity density are reduced by a factor of 2, with the kinetic correction, because the thermal force is reduced by the low collisionality of SOL plasma between the X-point and the (inner and outer) midplane. On the other hand, the profiles near the divertor plates are unaffected by the kinetic correction due to the highly collisional condition. The kinetic correction is found more pronounced for the higher charge states impurity due to the charge dependence of the parallel impurity force balance. Overall effects due to the kinetic correction on the total impurity radiation and the divertor heat load are confirmed to be a few % in the present discharge condition of JT-60U.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 7-8","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202300141","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140324499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlated ion stopping in dense plasmas with a temperature-dependent plasmon pole approximation","authors":"Zhanerke Zakirova,&nbsp;Bekbolat Tashev,&nbsp;Claude Deutsch","doi":"10.1002/ctpp.202300159","DOIUrl":"10.1002/ctpp.202300159","url":null,"abstract":"<p>The plasmon pole approximation used for the stopping function in a dense electron plasma is given a temperature-dependent cutoff wavenumber via the ion projectile thermal wavelength. Excepted for projectile inter-ion distance smaller than the target electron screening length and small ion fragment velocities, featuring a attosecond interaction time with a maximum correlated ion stopping (CIS) in inertial confinement fusion and warm dense matter (WDM), the given procedure is shown to yield back accurately the CIS estimated within the standard random phase approximation framework at any temperature, provided the ion fragment distribution is taken Gaussian.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202300159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140202704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of a quasi-aperiodic substrate on diffusion in a strongly coupled quasi-one-dimensional system","authors":"Ahmed Bekda,&nbsp;Mourad Djebli","doi":"10.1002/ctpp.202300173","DOIUrl":"10.1002/ctpp.202300173","url":null,"abstract":"<p>This study investigates the diffusion of charged particles interacting through a Yukawa potential. Confined by a parabolic potential along the <i>y</i>-axis, the particles experience an aperiodic substrate potential along the <i>x</i>-axis. To analyze their diffusion behavior, we employ molecular dynamics simulations based on the Langevin equation. We primarily focus on the influence of particle density, system temperature, particle charge, and the aperiodicity parameter (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>L</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {L}_2 $$</annotation>\u0000 </semantics></math>) of the quasi-aperiodic substrate on the system's diffusion characteristics. By adjusting <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>L</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {L}_2 $$</annotation>\u0000 </semantics></math> for various system parameters, we can manipulate diffusion and observe diverse diffusion modes. Our findings reveal that the aperiodicity's effect becomes pronounced at lower densities and smaller <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>L</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {L}_2 $$</annotation>\u0000 </semantics></math> values, leading to faster diffusion compared with the periodic case. However, over longer timescales, the system transitions to normal diffusion regardless of the specific parameters.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140202711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issue Information: Contrib. Plasma Phys. 03/2024","authors":"","doi":"10.1002/ctpp.202490006","DOIUrl":"https://doi.org/10.1002/ctpp.202490006","url":null,"abstract":"","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140164215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cover Picture: Contrib. Plasma Phys. 03/2024","authors":"","doi":"10.1002/ctpp.202490005","DOIUrl":"https://doi.org/10.1002/ctpp.202490005","url":null,"abstract":"<p>Discharge images under airflow, water level 150 mm, <i>L</i> = 40 mm, condition II (a) <i>U</i> = 10 kV, (b) <i>U</i> = 14 kV, (c) <i>U</i> = 18 kV. Fig. 4 of the paper by Desheng Zhou et al. https://doi.org/10.1002/ctpp.202300080\u0000 \u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140164445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the ion core on relaxation processes in dense plasmas","authors":"T. S. Ramazanov,&nbsp;S. K. Kodanova,&nbsp;M. K. Issanova,&nbsp;B. Z. Kenzhegulov","doi":"10.1002/ctpp.202300127","DOIUrl":"10.1002/ctpp.202300127","url":null,"abstract":"<p>The effect of an ionic core on the temperature relaxation in dense hot plasma of beryllium is studied using the pseudpotential model by Gericke et al [Phys. Rev. E 2010, 81, 065401(R)]. Employing the screened version of the ion pseudpotential [by Ramazanov et al, Phys. Plasmas 2021, 28 (9), 092702], we computed the quantum transport cross section for the electron-ion collisions in dense beryllium plasma, where screening is taking into account using the density response function in the long-wavelength regime. The results for the transport cross section are used to compute a generalised Coulomb logarithm and electron-ion collision frequency. Utilizing the latter, we show the effect of the ionic core on the temperature relaxation. To understand the role of the ionic core, we compare the results with the data computed considering ions as point-like charges.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 5","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140152330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface functional group regulation of Ti3C2Tx based on atmospheric pressure cold plasma","authors":"Weisheng Cui,&nbsp;Shuxiao Chen,&nbsp;Jialu Duan,&nbsp;Ruobing Zhang","doi":"10.1002/ctpp.202300103","DOIUrl":"10.1002/ctpp.202300103","url":null,"abstract":"<p>The modulation of surface properties of Ti₃C₂T_x plays a crucial role in its diverse applications across various fields. However, a straightforward and reliable technique for controlling its surface functional groups remains elusive. In this study, we achieved controlled modification of Ti₃C₂T_x surface functional groups using atmospheric-pressure cold plasma. We evaluated the plasma generation characteristics and found that the gas parameters could influence the discharge power and lead to different gas temperatures with the same voltage. Spectral analysis confirmed the presence of numerous reactive species in the plasma, facilitating the breaking and recombination of chemical bonds of functional groups on the Ti₃C₂T_x surface. The interaction between the plasma jet and Ti₃C₂T_x film revealed that the semiconductor properties of the Ti₃C₂T_x film limit the plasma diffusion area, while N₂ doping and increased gas flow rates respectively reduce and enlarge the coverage area of cold plasma. A brief one-minute cold plasma treatment induced a slight etching effect on the Ti₃C₂T_x film surface, effectively altering the -O and -F functional groups. However, it is noteworthy that excessive cold plasma treatment in the air may result in partial oxidation of Ti₃C₂T_x, necessitating the use of custom gas environments in further applications. This research provides valuable insights into surface modification techniques for Ti₃C₂T_x with potential implications in a wide range of applications.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 9","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140128768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elastic and breaking properties of epitaxial face-centered crystals in neutron star crusts and white dwarf cores","authors":"D. A. Baiko","doi":"10.1002/ctpp.202400004","DOIUrl":"10.1002/ctpp.202400004","url":null,"abstract":"<p>Crystallization of dense matter in neutron star crusts and white dwarf cores may be similar to epitaxial crystal growth in terrestrial laboratories. However, in stellar crystals, the spacing between horizontal planes has to gradually increase with the outward movement of the crystallization front, tracing decrease of the electron density. This process produces Coulomb crystals with stretched rather than cubic elementary cells. We extend the analysis of the elastic and breaking properties of such crystals to the face-centered (fc) lattice. Shear deformations orthogonal to the stretch direction have been studied for 22 crystallographic shear planes. A common property for all these planes is the reduction and eventual nulling of the breaking shear strain with deviation from the unstretched configuration. The effective shear moduli for deformations orthogonal to the stretch direction have been calculated. It is possible that the epitaxial crystallization in compact stars results in a formation of large-scale crystallites or, at least, in growth of the whole crystallization front perpendicular to particular crystallographic planes. For fc structure growth orthogonal to the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mrow>\u0000 <mo>{</mo>\u0000 <mn>111</mn>\u0000 <mo>}</mo>\u0000 </mrow>\u0000 </mrow>\u0000 <annotation>$$ left{111right} $$</annotation>\u0000 </semantics></math> planes, we expect that, at any density, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>∼</mo>\u0000 <mn>5</mn>\u0000 <mo>%</mo>\u0000 </mrow>\u0000 <annotation>$$ sim 5% $$</annotation>\u0000 </semantics></math> (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>∼</mo>\u0000 <mn>0.5</mn>\u0000 <mo>%</mo>\u0000 </mrow>\u0000 <annotation>$$ sim 0.5% $$</annotation>\u0000 </semantics></math>) of crystallite height is occupied by layers one (two) orders of magnitude weaker than the bulk of the crystallite. This may be important for realistic modeling of crustquakes on neutron stars.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140129889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Yuri L'vovich Klimontovich, his theory of fluctuations and its impact on the kinetic theory","authors":"Michael Bonitz,&nbsp;Anatoly Zagorodny","doi":"10.1002/ctpp.202400014","DOIUrl":"10.1002/ctpp.202400014","url":null,"abstract":"<p>Yuri L'vovich Klimontovich (September 28, 1924–October 26, 2002) was an outstanding theoretical physicist who made major contributions to kinetic theory. On the occasion of his 100th birthday, we recall his main scientific achievements.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 5","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202400014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140128764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toward plasma drifts in EMC3: Implementation of gradient, divergence, and particle tracing schemes","authors":"Ruben De Wolf,&nbsp;Felix Reimold,&nbsp;Yuhe Feng,&nbsp;Matthieu Jacobs,&nbsp;Wouter Dekeyser,&nbsp;Giovanni Samaey,&nbsp;Martine Baelmans","doi":"10.1002/ctpp.202300154","DOIUrl":"10.1002/ctpp.202300154","url":null,"abstract":"<p>This paper presents a first implementation of gradient, divergence, and particle tracing schemes for the EMC3 code, a stochastic 3D plasma fluid code widely employed for edge plasma and impurity transport modeling in tokamaks and stellarators. These schemes are essential to accommodate plasma drift computations, which are currently absent in the code. Plasma drifts have been recognized to significantly influence transport of particles and energy, and their inclusion in future code upgrades will substantially enhance the code's predictive capabilities. For gradient and divergence calculations, we introduce a second-order least-squares gradient scheme. We confirm the second-order convergence properties and assess the accuracy of several analytical test cases in the presence of synthetic noise. In the second part of this paper, we employ the validated gradient scheme in a fourth-order Runge–Kutta particle tracing scheme to trace a particle through a generic drift velocity field. The impact of synthetic noise on the scheme's performance is investigated by evaluating various error metrics. We find that the implemented schemes function as intended and exhibit sufficient accuracy to enable drift computations.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 7-8","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202300154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}