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.

Wall conditioning

Careful control of wall conditions is essential for successful operation.

The walls can be coated by various materials, using a set of ovens. TJ-II was the first stellarator to be operated with Lithium-coated walls.

• Metal wall
• Boron-coated wall
• Lithium-coated wall