دورية أكاديمية
Gyrofluid analysis of electron β e effects on collisionless reconnection
| العنوان: | Gyrofluid analysis of electron β e effects on collisionless reconnection |
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| المؤلفون: | Granier C., Borgogno D., Grasso D., Tassi E. |
| المساهمون: | Granier, C., Borgogno, D., Grasso, D., Tassi, E. |
| بيانات النشر: | Cambridge University Press |
| سنة النشر: | 2022 |
| المجموعة: | PORTO@iris (Publications Open Repository TOrino - Politecnico di Torino) |
| مصطلحات موضوعية: | astrophysical plasma, plasma instabilitie, space plasma physics |
| الوصف: | The linear and nonlinear evolutions of the tearing instability in a collisionless plasma with a strong guide field are analysed on the basis of a two-field Hamiltonian gyrofluid model. The model is valid for a low ion temperature and a finite. The finite effect implies a magnetic perturbation along the guide field direction, and electron finite Larmor radius effects. A Hamiltonian derivation of the model is presented. A new dispersion relation of the tearing instability is derived for the case and tested against numerical simulations. For the equilibrium electron temperature is seen to enhance the linear growth rate, whereas we observe a stabilizing role when electron finite Larmor radius effects become more relevant. In the nonlinear phase, stall phases and faster than exponential phases are observed, similarly to what occurs in the presence of ion finite Larmor radius effects. Energy transfers are analysed and the conservation laws associated with the Casimir invariants of the model are also discussed. Numerical simulations seem to indicate that finite effects do not produce qualitative modifications in the structures of the Lagrangian invariants associated with Casimirs of the model. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/WOS:000752463100001; volume:88; issue:1; numberofpages:35; journal:JOURNAL OF PLASMA PHYSICS; http://hdl.handle.net/11583/2963649Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85125042424; https://doi.org/10.1017/S0022377822000010Test |
| DOI: | 10.1017/S0022377822000010 |
| الإتاحة: | https://doi.org/10.1017/S0022377822000010Test http://hdl.handle.net/11583/2963649Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.887781DA |
| قاعدة البيانات: | BASE |
| DOI: | 10.1017/S0022377822000010 |
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