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[[File:W7X.png|400px|thumb|right|W7-X model]] | |||
Wendelstein 7-X (W7-X) is an experimental stellarator currently being built in Greifswald, Germany by the [[:Wikipedia:Max-Planck-Institut_f%C3%BCr_Plasmaphysik|Max-Planck-Institut für Plasmaphysik]] (IPP). W7-X is an optimized [[Stellarator|stellarator]], i.e. the magnetic field has been tailored to meet several physical optimization criteria. | Wendelstein 7-X (W7-X) is an experimental stellarator currently being built in Greifswald, Germany by the [[:Wikipedia:Max-Planck-Institut_f%C3%BCr_Plasmaphysik|Max-Planck-Institut für Plasmaphysik]] (IPP). W7-X is an optimized [[Stellarator|stellarator]], i.e. the magnetic field has been tailored to meet several physical optimization criteria. | ||
{| class="wikitable" align="center" border="1" | |||
!''Parameter'' !!''Value''!!''Unit'' | |||
|- | |||
|Major radius, ''R<sub>0</sub>'': || 5.5 || m | |||
|- | |||
|Minor radius, ''a'': || 0.53 || m | |||
|- | |||
|Plasma volume, ''V'': || 30 || m<sup>3</sup> | |||
|- | |||
|Non-planar coils: || 50 || | |||
|- | |||
|Planar coils: || 20 || | |||
|- | |||
|Number of ports: || 253 || | |||
|- | |||
|Rotational transform, ''ι/2π'': || 5/6-5/4 || | |||
|- | |||
|Magnetic field on axis, ''B<sub>0</sub>'': || <3 || T | |||
|- | |||
|Stored energy, ''W'': || 600 || MJ | |||
|- | |||
|Heating power, ''P'': || 15-30 || MW | |||
|- | |||
|Pulse length: || 30 || min | |||
|- | |||
|Machine height: || 4.5 || m | |||
|- | |||
|Machine diameter: || 16 || m | |||
|- | |||
|Machine mass: || 725 || t | |||
|} | |||
== Optimization criteria == | |||
* Feasible modular coils | |||
* Good, nested magnetic surfaces | |||
* Good finite-[[Beta|β]] equilibria | |||
* Good MHD [[Plasma instability|stability]] | |||
* Small [[neoclassical transport]] | |||
* Small [[bootstrap current]] | |||
* Good confinement of fast particles | |||
== See also == | == See also == | ||
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* [http://www.ipp.mpg.de/ippcms/eng/for/bereiche/w7xaufbau/index.html Wendelstein 7-X] (division) | * [http://www.ipp.mpg.de/ippcms/eng/for/bereiche/w7xaufbau/index.html Wendelstein 7-X] (division) | ||
* [http://www.ipp.mpg.de/ippcms/eng/for/projekte/w7x/index.html Wendelstein 7-X] (project) | * [http://www.ipp.mpg.de/ippcms/eng/for/projekte/w7x/index.html Wendelstein 7-X] (project) | ||
Revision as of 10:18, 25 September 2011
Wendelstein 7-X (W7-X) is an experimental stellarator currently being built in Greifswald, Germany by the Max-Planck-Institut für Plasmaphysik (IPP). W7-X is an optimized stellarator, i.e. the magnetic field has been tailored to meet several physical optimization criteria.
| Parameter | Value | Unit |
|---|---|---|
| Major radius, R0: | 5.5 | m |
| Minor radius, a: | 0.53 | m |
| Plasma volume, V: | 30 | m3 |
| Non-planar coils: | 50 | |
| Planar coils: | 20 | |
| Number of ports: | 253 | |
| Rotational transform, ι/2π: | 5/6-5/4 | |
| Magnetic field on axis, B0: | <3 | T |
| Stored energy, W: | 600 | MJ |
| Heating power, P: | 15-30 | MW |
| Pulse length: | 30 | min |
| Machine height: | 4.5 | m |
| Machine diameter: | 16 | m |
| Machine mass: | 725 | t |
Optimization criteria
- Feasible modular coils
- Good, nested magnetic surfaces
- Good finite-β equilibria
- Good MHD stability
- Small neoclassical transport
- Small bootstrap current
- Good confinement of fast particles
See also
- Wendelstein 7-X (division)
- Wendelstein 7-X (project)