TJ-II:Plasma Wall Interaction

To condition the wall of the TJ-II vacuum vessel, a number of techniques is used.

Glow Discharge Cleaning

Glow discharge cleaning is routinely used at TJ-II. ^[1] ^[2]

Wall conditioning

Careful control of wall conditions is essential for successful operation. ^[3]

The walls can be coated by various materials, using a set of 4 evaporation ovens: two fixed and two mounted on retractable manipulators. TJ-II was the first stellarator to be operated with Lithium-coated walls.

Metal wall
Boron-coated wall ^[4]
Lithium-coated wall ^[5] ^[6]

References

[1] D. Tafalla and F.L. Tabarés, Journal of Nuclear Materials 290-293 (2001) 1195-1198

[2] D. Tafalla and F.L. Tabarés, Vacuum 64, Issues 3-4 (2002) 411-415

[3] F.L. Tabarés et al, Journal of Nuclear Materials 290-293 (2001) 748-752

[4] D. Tafalla and F.L. Tabarés, Vacuum 67, Issues 3-4 (2002) 393-397

[5] F.L. Tabarés at al, Plasma Phys. Control. Fusion 50 (2008) 124051

[6] J. Sánchez et al, Journal of Nuclear Materials 390-391 (2009) 852-857

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