Suppression of phase mixing in drift-kinetic plasma turbulence
Transfer of free energy from large to small velocity-space scales by phase mixing leads to Landau damping in a linear plasma. In a turbulent drift-kinetic plasma, this transfer is statistically nearly canceled by an inverse transfer from small to large velocity-space scales due to “anti-phase-mixing...
| Main Authors: | , , , |
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| Format: | Journal article |
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AIP Publishing
2016
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| _version_ | 1826259050144202752 |
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| author | Parker, J Highcock, E Schekochihin, A Dellar, P |
| author_facet | Parker, J Highcock, E Schekochihin, A Dellar, P |
| author_sort | Parker, J |
| collection | OXFORD |
| description | Transfer of free energy from large to small velocity-space scales by phase mixing leads to Landau damping in a linear plasma. In a turbulent drift-kinetic plasma, this transfer is statistically nearly canceled by an inverse transfer from small to large velocity-space scales due to “anti-phase-mixing” modes excited by a stochastic form of plasma echo. Fluid moments (density, velocity, temperature) are thus approximately energetically isolated from the higher moments of the distribution function, so phase mixing is ineffective as a dissipation mechanism when the plasma collisionality is small. |
| first_indexed | 2024-03-06T18:43:45Z |
| format | Journal article |
| id | oxford-uuid:0dca7b88-8236-4f48-a675-9bb90a4394ce |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:43:45Z |
| publishDate | 2016 |
| publisher | AIP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:0dca7b88-8236-4f48-a675-9bb90a4394ce2022-03-26T09:42:24ZSuppression of phase mixing in drift-kinetic plasma turbulenceJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0dca7b88-8236-4f48-a675-9bb90a4394ceSymplectic Elements at OxfordAIP Publishing2016Parker, JHighcock, ESchekochihin, ADellar, PTransfer of free energy from large to small velocity-space scales by phase mixing leads to Landau damping in a linear plasma. In a turbulent drift-kinetic plasma, this transfer is statistically nearly canceled by an inverse transfer from small to large velocity-space scales due to “anti-phase-mixing” modes excited by a stochastic form of plasma echo. Fluid moments (density, velocity, temperature) are thus approximately energetically isolated from the higher moments of the distribution function, so phase mixing is ineffective as a dissipation mechanism when the plasma collisionality is small. |
| spellingShingle | Parker, J Highcock, E Schekochihin, A Dellar, P Suppression of phase mixing in drift-kinetic plasma turbulence |
| title | Suppression of phase mixing in drift-kinetic plasma turbulence |
| title_full | Suppression of phase mixing in drift-kinetic plasma turbulence |
| title_fullStr | Suppression of phase mixing in drift-kinetic plasma turbulence |
| title_full_unstemmed | Suppression of phase mixing in drift-kinetic plasma turbulence |
| title_short | Suppression of phase mixing in drift-kinetic plasma turbulence |
| title_sort | suppression of phase mixing in drift kinetic plasma turbulence |
| work_keys_str_mv | AT parkerj suppressionofphasemixingindriftkineticplasmaturbulence AT highcocke suppressionofphasemixingindriftkineticplasmaturbulence AT schekochihina suppressionofphasemixingindriftkineticplasmaturbulence AT dellarp suppressionofphasemixingindriftkineticplasmaturbulence |