...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of geophysical research >On the Quasi-linear Saturation of the Parallel Proton Firehose Instability Using a Full-f Approach
【24h】

On the Quasi-linear Saturation of the Parallel Proton Firehose Instability Using a Full-f Approach

机译：On the Quasi-linear Saturation of the Parallel Proton Firehose Instability Using a Full-f Approach

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

abstract_textpA classic example for the application of quasi-linear theory to electromagnetic wave-particle interactions, the saturation of the parallel proton firehose instability, is usually considered in the long-wavelength approximation although for beta(,p) less than or similar to 25 this instability is dominated by anomalous cyclotron resonance, which invalidates a macroscopic treatment (Gary et al., 1998, https://doi.org/10.1029/98JA01174).. To relax the long-wavelength approximation, Seough et al. (2015, https://doi.org/10.1063/1.4905230) solved the microscopic weak turbulence kinetic equation to model the temperature anisotropy reduction of the firehose also in the resonant regime. However, the employed moment-kinetic approach assumes the preservation of the initially bi-Maxwellian shape of the underlying proton velocity distribution throughout the saturation process, leading to poor results for low beta(,p). In this work, we lift the limitations of the moment-kinetic approach and we demonstrate that allowing for distribution deformation due to anomalous cyclotron-resonant scattering greatly improves the predictions of the kinetic quasi-linear model except for cases of very strong firehose growth. We conclude that quasi-linear theory can be a valid model for studying the parallel firehose saturation even in the strongly cyclotron-resonant regime as long as the initial temperature anisotropy is not too large./p/abstract_text

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号