Ion Channel Dynamics in Temperature-Dependent Weibel Instability Saturation
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908993139507200 |
|---|---|
| author | Shrivastav, Vivek Chettri, Mani K Singh, Hemam D. Singh, Britan Mukherjee, Rupak |
| author_facet | Shrivastav, Vivek Chettri, Mani K Singh, Hemam D. Singh, Britan Mukherjee, Rupak |
| contents | We present 1X2V continuum Vlasov-Maxwell simulations of interpenetrating plasma beams with mobile ions. While the early-time evolution is similar to the stationary-ion case, the late-time dynamics are dominated by the ion-Weibel instability. As ion channels merge, the magnetic energy increases and the magnetic structures extend further along the beam direction. Electrons rapidly reach thermal equilibrium, whereas ions retain distinct bulk velocities for much longer and thermalize more slowly. These results are relevant to collisionless shock formation in astrophysical compact objects and laser-plasma experiments. Wind/SWE observations place all four simulated cases in the firehose/Weibel-unstable region of the proton temperature anisotropy diagram, and MMS1 observations of a quasi-perpendicular bow shock ($θ_{Bn}\approx83^\circ$, $M_A\approx27$) show a qualitatively similar electron-ion thermalization disparity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_21875 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Ion Channel Dynamics in Temperature-Dependent Weibel Instability Saturation Shrivastav, Vivek Chettri, Mani K Singh, Hemam D. Singh, Britan Mukherjee, Rupak Plasma Physics We present 1X2V continuum Vlasov-Maxwell simulations of interpenetrating plasma beams with mobile ions. While the early-time evolution is similar to the stationary-ion case, the late-time dynamics are dominated by the ion-Weibel instability. As ion channels merge, the magnetic energy increases and the magnetic structures extend further along the beam direction. Electrons rapidly reach thermal equilibrium, whereas ions retain distinct bulk velocities for much longer and thermalize more slowly. These results are relevant to collisionless shock formation in astrophysical compact objects and laser-plasma experiments. Wind/SWE observations place all four simulated cases in the firehose/Weibel-unstable region of the proton temperature anisotropy diagram, and MMS1 observations of a quasi-perpendicular bow shock ($θ_{Bn}\approx83^\circ$, $M_A\approx27$) show a qualitatively similar electron-ion thermalization disparity. |
| title | Ion Channel Dynamics in Temperature-Dependent Weibel Instability Saturation |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2604.21875 |