Breakdown field distortion of three liquid media: (a) Electric field under deionized water; (b) electric field underwater-based drilling fluid action; (c) electric field under oil-based drilling fluid action. Fig. 7 of the paper by X. Zhu et al. https://onlinelibrary.wiley.com/doi/10.1002/ctpp.202400035
{"title":"Cover Picture: Contrib. Plasma Phys. 10/2024","authors":"","doi":"10.1002/ctpp.202490017","DOIUrl":"https://doi.org/10.1002/ctpp.202490017","url":null,"abstract":"<p>Breakdown field distortion of three liquid media: (a) Electric field under deionized water; (b) electric field underwater-based drilling fluid action; (c) electric field under oil-based drilling fluid action. Fig. 7 of the paper by X. Zhu et al. https://onlinelibrary.wiley.com/doi/10.1002/ctpp.202400035<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 10","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142641513","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}
F. X. Bronold and F. Willert. About the quantum-kinetic derivation of boundary conditions for quasiparticle Boltzmann equations at interfaces. Contributions to Plasma Physics. 2024; 64:e202300168. https://doi.org/10.1002/ctpp.202300168.
We sincerely regret the lapses.
F.X. Bronold 和 F. Willert.关于界面上准粒子玻尔兹曼方程边界条件的量子动力学推导。对等离子体物理学的贡献.2024; 64:e202300168。https://doi.org/10.1002/ctpp.202300168.We，对失误表示诚挚的歉意。
{"title":"Corrigendum: About the Quantum-Kinetic Derivation of Boundary Conditions for Quasiparticle Boltzmann Equations at Interfaces","authors":"","doi":"10.1002/ctpp.202400119","DOIUrl":"https://doi.org/10.1002/ctpp.202400119","url":null,"abstract":"<p>F. X. Bronold and F. Willert. About the quantum-kinetic derivation of boundary conditions for quasiparticle Boltzmann equations at interfaces. Contributions to Plasma Physics. 2024; 64:e202300168. https://doi.org/10.1002/ctpp.202300168.</p><p>We sincerely regret the lapses.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 10","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202400119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142641511","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}
Mylar/Au thin foil (a), irradiated target in different places with different laser shots (b), scheme (c), and photo (d) of the used experimental setup. Fig. 1 of the paper by L. Torrisi et al. https://doi.org/10.1002/ctpp.202300166
{"title":"Cover Picture: Contrib. Plasma Phys. 09/2024","authors":"","doi":"10.1002/ctpp.202490015","DOIUrl":"https://doi.org/10.1002/ctpp.202490015","url":null,"abstract":"<p>Mylar/Au thin foil (a), irradiated target in different places with different laser shots (b), scheme (c), and photo (d) of the used experimental setup. Fig. 1 of the paper by L. Torrisi et al. https://doi.org/10.1002/ctpp.202300166<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 9","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429123","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}
Snapshots of poloidal planes with established electromagnetic turbulent profiles on a toroidal geometry with an outer limiter. Results are shown after 0.8 ms simulated time: (a) electron density, (b) electron temperature, (c) radial ExB drift, (d) electric potential, (e) parallel current density, and (f) parallel electromagnetic potential. Fig. 4 of the paper by R. Düll et al. https://onlinelibrary.wiley.com/doi/10.1002/ctpp.202300147
{"title":"Cover Picture: Contrib. Plasma Phys. 07/2024","authors":"","doi":"10.1002/ctpp.202490013","DOIUrl":"https://doi.org/10.1002/ctpp.202490013","url":null,"abstract":"<p>Snapshots of poloidal planes with established electromagnetic turbulent profiles on a toroidal geometry with an outer limiter. Results are shown after 0.8 ms simulated time: (a) electron density, (b) electron temperature, (c) radial ExB drift, (d) electric potential, (e) parallel current density, and (f) parallel electromagnetic potential. Fig. 4 of the paper by R. Düll et al. https://onlinelibrary.wiley.com/doi/10.1002/ctpp.202300147<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 7-8","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275085","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}
EMEC waves driven by kinetic anisotropies and suprathermal particles are expected to play an important role at dissipative scales in the solar wind and planetary magnetospheres. Moreover, the correlation of EMEC waves with electric field magnitude and direction can be a tool to probe the inner magnetosphere. Thus, in this manuscript, we present the study of EMEC waves driven by temperature anisotropy in bi‐Kappa distributed space plasmas in the presence of a parallel DC electric field. The dispersion equation bearing the influence of electric field and suprathermal particles followed by the analytical expressions for wave frequency and wave growth rate is derived. The general dispersion equation is solved numerically to unveil the effect of suprathermal particles, temperature anisotropy, and the magnitude of the electric field on growth rate as well as the domain of unstable wave numbers, and the obtained numerical outcomes are compared with those of the bi‐Maxwellian model. Moreover, the maximum growth rates for EMEC waves have also been obtained.
{"title":"On EMEC Instability in Bi‐Kappa Distributed Space Plasmas Under the Influence of Parallel DC Electric Field","authors":"M. Nazeer","doi":"10.1002/ctpp.202300089","DOIUrl":"https://doi.org/10.1002/ctpp.202300089","url":null,"abstract":"EMEC waves driven by kinetic anisotropies and suprathermal particles are expected to play an important role at dissipative scales in the solar wind and planetary magnetospheres. Moreover, the correlation of EMEC waves with electric field magnitude and direction can be a tool to probe the inner magnetosphere. Thus, in this manuscript, we present the study of EMEC waves driven by temperature anisotropy in bi‐Kappa distributed space plasmas in the presence of a parallel DC electric field. The dispersion equation bearing the influence of electric field and suprathermal particles followed by the analytical expressions for wave frequency and wave growth rate is derived. The general dispersion equation is solved numerically to unveil the effect of suprathermal particles, temperature anisotropy, and the magnitude of the electric field on growth rate as well as the domain of unstable wave numbers, and the obtained numerical outcomes are compared with those of the bi‐Maxwellian model. Moreover, the maximum growth rates for EMEC waves have also been obtained.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"11 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264127","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}
The hydraulic‐electric pulsed discharge(HEPD) rock‐breaking technology is a new high‐efficiency technology that generates plasma shock waves to rupture rocks. Since the plasma channel formation mechanism involved in HEPD rock‐breaking technology is difficult to describe, there are fewer theoretical models of this technology. This paper establishes a HEPD plasma model, which integrally considers the mutual coupling between five physical fields. The multi‐physical field model realizes the whole process of plasma channels, breakdown channels, plasma shock waves, and plasma shock wave rock‐breaking during the HEPD. The changes in mass fraction, density, and diffusion flux of relevant elements in the electrochemical reaction equation of the plasma channel are comprehensively analyzed. The obtained plasma multiphysics field model shows that the interpenetration of charged ions forms the breakdown channel and plasma channel. The anion number density is related to the H‐ number density, and the decrease in H‐ number density is due to the fact that the energy in the plasma channel is not sufficient to satisfy the relevant chemical equations to continue the collision reaction. The damage to the rock by the plasma shock wave takes the form of a gradual spreading of the plasma shock wave from the center of the rock to the edges, which leads to rock fragmentation. The model has the potential to establish a link between HEPD rock‐breaking parameters and the efficiency of HEPD rock‐breaking, which could provide a practical way for the development and parameter optimization of hydraulic‐electric pulsed discharge rock‐breaking tools.
{"title":"Electrochemical Investigation of Plasma Channels During Hydraulic‐Electric Pulsed Discharges","authors":"Weiji Liu, Xin Zhou, Zhimin Zhang, Xiaohua Zhu","doi":"10.1002/ctpp.202400066","DOIUrl":"https://doi.org/10.1002/ctpp.202400066","url":null,"abstract":"The hydraulic‐electric pulsed discharge(HEPD) rock‐breaking technology is a new high‐efficiency technology that generates plasma shock waves to rupture rocks. Since the plasma channel formation mechanism involved in HEPD rock‐breaking technology is difficult to describe, there are fewer theoretical models of this technology. This paper establishes a HEPD plasma model, which integrally considers the mutual coupling between five physical fields. The multi‐physical field model realizes the whole process of plasma channels, breakdown channels, plasma shock waves, and plasma shock wave rock‐breaking during the HEPD. The changes in mass fraction, density, and diffusion flux of relevant elements in the electrochemical reaction equation of the plasma channel are comprehensively analyzed. The obtained plasma multiphysics field model shows that the interpenetration of charged ions forms the breakdown channel and plasma channel. The anion number density is related to the H‐ number density, and the decrease in H‐ number density is due to the fact that the energy in the plasma channel is not sufficient to satisfy the relevant chemical equations to continue the collision reaction. The damage to the rock by the plasma shock wave takes the form of a gradual spreading of the plasma shock wave from the center of the rock to the edges, which leads to rock fragmentation. The model has the potential to establish a link between HEPD rock‐breaking parameters and the efficiency of HEPD rock‐breaking, which could provide a practical way for the development and parameter optimization of hydraulic‐electric pulsed discharge rock‐breaking tools.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"31 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264128","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}
Qianghua Yuan, Liwen Shan, Guiqin Yin, Yutian Huang, Zhaohui Liu
This paper examines the impact of different type external matching networks on the discharge characteristics of dual‐frequency capacitively coupled plasma. A nonlinear global model is employed to analyze the discharge of dual‐frequency capacitively coupled argon plasma, with a low frequency of 8 MHz and 60 W and a high frequency of 100 MHz at 10–80 W. Discharge voltage waveforms, current waveforms, and emission spectra of the plasma were measured, while electron density and electron temperature were determined using the Boltzmann method. The electron density and electron temperature are utilized as input parameters for the nonlinear global model, while the plasma discharge is simulated with a fixed low‐frequency radio frequency (RF) source power (60 W) and a varied high‐frequency RF source power ranging from 10 to 80 W. The results indicate that the plasma discharge current, sheath capacitance, plasma resistance, plasma inductance, and the ratio of stochastic heating to Ohmic heating increase, while the sheath thickness decreases with increasing power. It is also found that the fundamental frequency current as well as 12th and 13th harmonic currents in the plasma are caused by the matching network and the nonlinear interaction between the sheath and the plasma. An optimal matching network can be designed to eliminate the effects of the harmonics and to meet industrial requirements for discharge uniformity.
{"title":"Influence of Matching Network on the Discharge Characteristic of Dual—Frequency Capacitively Coupled Ar Plasma","authors":"Qianghua Yuan, Liwen Shan, Guiqin Yin, Yutian Huang, Zhaohui Liu","doi":"10.1002/ctpp.202400059","DOIUrl":"https://doi.org/10.1002/ctpp.202400059","url":null,"abstract":"This paper examines the impact of different type external matching networks on the discharge characteristics of dual‐frequency capacitively coupled plasma. A nonlinear global model is employed to analyze the discharge of dual‐frequency capacitively coupled argon plasma, with a low frequency of 8 MHz and 60 W and a high frequency of 100 MHz at 10–80 W. Discharge voltage waveforms, current waveforms, and emission spectra of the plasma were measured, while electron density and electron temperature were determined using the Boltzmann method. The electron density and electron temperature are utilized as input parameters for the nonlinear global model, while the plasma discharge is simulated with a fixed low‐frequency radio frequency (RF) source power (60 W) and a varied high‐frequency RF source power ranging from 10 to 80 W. The results indicate that the plasma discharge current, sheath capacitance, plasma resistance, plasma inductance, and the ratio of stochastic heating to Ohmic heating increase, while the sheath thickness decreases with increasing power. It is also found that the fundamental frequency current as well as 12th and 13th harmonic currents in the plasma are caused by the matching network and the nonlinear interaction between the sheath and the plasma. An optimal matching network can be designed to eliminate the effects of the harmonics and to meet industrial requirements for discharge uniformity.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"37 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264131","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}
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