Structure formation in magnetised plasmas
Duration: 39 mins 59 secs
Share this media item:
Embed this media item:
Embed this media item:
About this item
| Description: |
Hornig, G
Friday 22nd September 2017 - 14:50 to 15:30 |
|---|
| Created: | 2017-09-25 13:47 |
|---|---|
| Collection: | Growth form and self-organisation |
| Publisher: | Isaac Newton Institute |
| Copyright: | Hornig, G |
| Language: | eng (English) |
| Distribution: |
World
(downloadable)
|
| Explicit content: | No |
| Aspect Ratio: | 16:9 |
| Screencast: | No |
| Bumper: | UCS Default |
| Trailer: | UCS Default |
| Abstract: | Magnetic fields in high temperature plasmas have a tendency to take on the structure of Beltrami fields, also known as force-free fields. These fields play also an important role in vortex dynamics as they form stationary solutions of the Euler equation. While it is comparatively easy to show that the class of Beltrami fields are minimum energy states under certain constraints, it is much harder to predict to which particular force-free state a given magnetic field will relax to. We review what is known about the various routes of relaxation and present some newer results of simulations which show that the dynamics depends strongly on the existence of turbulence during the relaxation process and the environment in which this turbulent plasma is embedded. |
|---|---|
Available Formats
| Format | Quality | Bitrate | Size | |||
|---|---|---|---|---|---|---|
| MPEG-4 Video | 640x360 | 1.94 Mbits/sec | 582.19 MB | View | Download | |
| WebM | 640x360 | 500.04 kbits/sec | 146.44 MB | View | Download | |
| iPod Video | 480x270 | 522.1 kbits/sec | 152.90 MB | View | Download | |
| MP3 | 44100 Hz | 249.78 kbits/sec | 73.21 MB | Listen | Download | |
| Auto * | (Allows browser to choose a format it supports) | |||||