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TJ-II: Difference between revisions
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In TJ-II, the magnetic trap is obtained by means of various sets of coils that completely determine the magnetic surfaces before plasma initiation. The toroidal field is created by 32 coils. The tree-dimensional twist of the central axis of the configuration is generated by means of two central coils: one circular and one helical. The horizontal position of the plasma is controlled by the vertical field coils. The combined action of these magnetic fields generate bean-shaped magnetic surfaces that guide the particles of the plasma so that they do not collide with the vacuum vessel wall. | In TJ-II, the magnetic trap is obtained by means of various sets of coils that completely determine the magnetic surfaces before plasma initiation. The toroidal field is created by 32 coils. The tree-dimensional twist of the central axis of the configuration is generated by means of two central coils: one circular and one helical. The horizontal position of the plasma is controlled by the vertical field coils. The combined action of these magnetic fields generate bean-shaped magnetic surfaces that guide the particles of the plasma so that they do not collide with the vacuum vessel wall. | ||
TJ-II discharges last 0. | TJ-II discharges last around 0.25 s, with a repetition frequency of about 7 minutes. | ||
== Goals == | == Goals == | ||
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* [[TJ-II:Helium Beam|Helium Beam]] | * [[TJ-II:Helium Beam|Helium Beam]] | ||
* [[TJ-II:Fast camera|Fast camera]] | * [[TJ-II:Fast camera|Fast camera]] | ||
== Numerical resources == | |||
=== Simulation codes === | |||
* [[VMEC]] - 3D Plasma equilibrium, assuming nested flux surfaces | |||
* [[PIES]] - 3D Plasma equilibrium | |||
* [[ASTRA]] - Plasma transport | |||
* [[PROCTR]] - Plasma transport | |||
* [[EIRENE]] | |||
* [[FAFNER]] | |||
* [[Master]] - 1D Master Equation solver for non-diffusive transport | |||
=== Data analysis === | |||
* [[Wave_ana]] - Linear and non-linear data analysis, spectral analysis using Fourier and Wavelets | |||
* [[EBITA]] - Tomographic reconstruction | |||
* [[TJII:Tomography|Tomography]] - Tomographic reconstruction based on mode decomposition in flux surface geometry | |||
* [[TJII:FM|FM]] - Density reconstruction for the reflectometer | |||
== Research == | == Research == | ||
Some research topics | Some research topics at TJ-II are: | ||
* [[TJ-II:Transport and the magnetic configuration|Transport and the magnetic configuration]] | * [[TJ-II:Transport and the magnetic configuration|Transport and the magnetic configuration]] | ||
* [[TJ-II:Confinement transitions|Confinement transitions]] | * [[TJ-II:Confinement transitions|Confinement transitions]] | ||
* [[TJ-II:Plasma Wall Interaction|Plasma Wall Interaction]] | |||