Contributions to Plasma Physics最新文献

{"title":"HL-2A's ELM cycle simulations by integrating BOUT++'s drift MHD and transport code","authors":"Xinliang Xu,&nbsp;Zhanhui Wang,&nbsp;Nami Li,&nbsp;Na Wu,&nbsp;Yulin Zhou,&nbsp;Xueke Wu,&nbsp;Cailong Fu","doi":"10.1002/ctpp.202300144","DOIUrl":"10.1002/ctpp.202300144","url":null,"abstract":"<p>A new integrating model has been developed to couple tokamak edge multiscale magnetohydrodynamic (MHD) events and transport simulations, such as edge-localized mode (ELM) cycles. As a proof of principle, we first start from a set of three-field two-fluid model equations, which includes the pressure, current, and vorticity. The equations are separated into the slowly evolving part of the axisymmetric component by taking a time average of the axisymmetric component. The time-averaged fluxes, which are quadratic in fluctuating quantities, act as driven terms for the time-averaged axisymmetric quantities that determine the plasma transport, and therefore the large-scale evolution of the plasma profiles. Then the HL-2A's ELM cycles are simulated using the model. Good agreements of ELM size and pedestal recovery time have been achieved for the solutions obtained from the coupled simulation compared with experiment. For one ELM cycle simulation, the coupled code can achieve a speedup of a factor of up to 30 over standalone code.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 7-8","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213593","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":"Shear-modified ion-acoustic instability in ionospheric multi-ion plasmas","authors":"K. Shahzad,&nbsp; Aman-ur-Rehman,&nbsp;S. Ali,&nbsp;Muhammad Yousaf Hamza","doi":"10.1002/ctpp.202300157","DOIUrl":"https://doi.org/10.1002/ctpp.202300157","url":null,"abstract":"&lt;p&gt;The linear properties of the low-frequency ion-acoustic (IA) waves are studied in a collisionless magnetoplasma using both fluid and kinetic descriptions in the presence of particle shear flows and field-aligned currents. Two different compositions of plasmas such as &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mfenced&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;mo&gt;+&lt;/mo&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;O&lt;/mi&gt;\u0000 &lt;mo&gt;+&lt;/mo&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;e&lt;/mi&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mfenced&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ left({H}^{+},{O}^{+},{e}^{-}right) $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; and &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mfenced&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;O&lt;/mi&gt;\u0000 &lt;mo&gt;+&lt;/mo&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;e&lt;/mi&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mfenced&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ left({H}^{-},{O}^{+},{e}^{-}right) $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; are analyzed under the drift approximation and plan wave solution. Calculating a generalized linear dispersion function, shear-modified IA waves are investigated with various limiting cases. In contrast, relying on the kinetic treatment, a generalized dielectric response function is also solved to study the real frequency and growth rate of the shear-modified IA waves. Numerically, it is shown that a small concentration of negative hydrogen ions in the oxygen ionospheric plasma may lead to an increase in the growth rate and real frequency of the IA waves. The growth rate of negative hydrogen ion plasma is relatively found larger than that of positive hydrogen ion plasma. It is also noted that growth rate increases significantly with field-aligned flow of lighter species as compared with heavier ones. The magnitudes of the wave frequency and growth rate become larger when plasma species stream in the same direction as compared with counter-streaming of plasma species. Additionally, the shear flow modifies the profiles of wave instability and IA oscillations are greatly influenced by the same and opposite sides' particle shear flows. The growth rate increases as the shear flow increases, resulting in wider curves. The present findings are important for understanding the low-frequency electrostatic ","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"65 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114578","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":"Effect of temperature on the wave breaking amplitude of nonlinear relativistic strong plasma waves","authors":"Govind Singh Yadav,&nbsp;Mithun Karmakar","doi":"10.1002/ctpp.202400075","DOIUrl":"10.1002/ctpp.202400075","url":null,"abstract":"<p>The wave-breaking amplitude of a strong nonlinear plasma wave has been determined in a warm plasma. Pseudopotential technique has been adopted to describe the wave-breaking phenomena in such plasma. The solution is obtained with the consideration that the phase velocity of the plasma wave is equal to the velocity of light in vacuum. This assumption is justified since the wave which is excited usually by the relativistic charged particle bunches or laser pulses has phase speed very close to the speed of light in vacuum. The investigation shows that the breaking amplitude decreases with the increase of the electron temperature. Furthermore, the wavelength of the plasma wave is seen to decrease as we increase the electron temperature. The obtained results have relevance in the astrophysical situation as well as in the field of plasma based charged particle acceleration process.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"65 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141886006","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":"Cover Picture: Contrib. Plasma Phys. 06/2024","authors":"","doi":"10.1002/ctpp.202490011","DOIUrl":"10.1002/ctpp.202490011","url":null,"abstract":"<p>Ken Golden (top photo) and Gabor Kalman (bottom photo). Photos by P. Hartmann.\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 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870823","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":"Issue Information: Contrib. Plasma Phys. 06/2024","authors":"","doi":"10.1002/ctpp.202490012","DOIUrl":"10.1002/ctpp.202490012","url":null,"abstract":"","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 6","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870824","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":"Parametric coupling of whistler waves with gyrating ion beam in a complex plasma","authors":"Twinkle Pahuja,&nbsp;Amit Kumar,&nbsp;Jyotsna Sharma,&nbsp;Anuj Vijay","doi":"10.1002/ctpp.202400055","DOIUrl":"10.1002/ctpp.202400055","url":null,"abstract":"<p>This manuscript examines the non-linear interaction between the negative energy beam cyclotron mode and the high-frequency whistler waves. The negative energy beam mode is supported in the vicinity of the beam gyro-frequency harmonics by a gyrating ion beam with <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>a</mi>\u0000 </mrow>\u0000 <annotation>$$ mathrm{a} $$</annotation>\u0000 </semantics></math> ring-shaped velocity distribution. Using a gyrating ion beam, we have examined how dust charge variations affect the parametric up-conversion of high-frequency whistler waves (WWs) into a side band wave and a low-frequency mode. For the linked modes, a non-linear dispersion relation is obtained. It is demonstrated that the WWs divided by beam gyro-frequency harmonics are up-converted by a gyrating ion-beam frequency. An expression for the ion cyclotron mode wave growth rate has been obtained. The estimation of the turbulence growth rate takes into account for the typical parameters of existing dusty plasma. It has been observed that an increased growth rate is reported with a rise in the pump wave amplitude, beam gyro-frequency, number density of dust grains, and the relative density of dust grains. However, a decline in the growth rate has been observed with increasing gyrating ion beam density and dust grain's size.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"65 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779877","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":"Numerical study of sheath formation in multi-ion species plasmas","authors":"Panupong Rintarak,&nbsp;Yasuhiro Suzuki,&nbsp;Gakushi Kawamura","doi":"10.1002/ctpp.202300140","DOIUrl":"10.1002/ctpp.202300140","url":null,"abstract":"<p>A study of multi-ion species plasmas in divertor region through kinetic simulation helps us understand particle transports and wall interactions. We analyzed plasma sheath behavior without collisions involving electrons, hydrogen isotopes, and helium ions using a one-dimensional spatial space and three-dimensional velocity space (1D3V) Particle-In-Cell (PIC) simulation. The PIC simulation model follows Maxwellian velocity distributions with the pre-sheath acceleration for each particle species in the plasma source, and the plasmas move to the absorption wall with equal and constant flux. This revealed spatial potential variations due to differences in masses and charges of multi-ion species plasmas, including independent sound velocities of each ion species. Increasing ion masses result in a more negative wall potential. The electrostatic force repels electrons and accelerates multi-ions to reach the absorption wall. This information is found in the phase spaces of velocity in the sheath.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 7-8","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141608202","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":"Numerical investigation of thermal damage in rocks under high-voltage electric pulse","authors":"Xiaohua Zhu,&nbsp;Siqi Liu,&nbsp;Weiji Liu,&nbsp;Xin Zhou,&nbsp;Wuji Tang","doi":"10.1002/ctpp.202400058","DOIUrl":"10.1002/ctpp.202400058","url":null,"abstract":"<p>The high-voltage electric pulse fracturing (HVEPF) technology represents a novel and highly promising approach in rock fracturing. The investigation of thermal damage inflicted upon rocks by high-voltage electrical pulses under multi-physical field coupling is of great significance in the development of deep geothermal energy. This study establishes a damage model for rocks under electric fragmentation conditions by integrating electric field, heat transfer field, and solid mechanics field. Based on the developed damage model, the insulating properties, temperature variations, and forms of damage of rocks during electric fracturing are explored. Subsequently, the influence of voltage on rock damage status is investigated. The findings reveal that damage to the rock does not occur immediately after electrical breakdown; rather, it increases with the growth of current and temperature within the breakdown channel. Initial damage occurs at the ends of the breakdown channel, followed closely by damage in the central region of the channel. The predominant form of damage in rocks is tensile failure, with shear failure playing a secondary role, and the volume of damage increases with voltage. These results elucidate the characteristics of rock damage during electric fracturing, providing valuable insights for the engineering application of electric fracturing techniques.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"65 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586277","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":"Cover Picture: Contrib. Plasma Phys. 05/2024","authors":"","doi":"10.1002/ctpp.202490009","DOIUrl":"https://doi.org/10.1002/ctpp.202490009","url":null,"abstract":"<p>Yuri Lvovich Klimontovich in Moscow in 1999. Photo by M. Bonitz. Fig. 1 of the paper by Michael Bonitz et al. https://doi.org/10.1002/ctpp.202400014\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 5","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141487942","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":"Issue Information: Contrib. Plasma Phys. 05/2024","authors":"","doi":"10.1002/ctpp.202490010","DOIUrl":"https://doi.org/10.1002/ctpp.202490010","url":null,"abstract":"","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 5","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202490010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141487943","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}