Gas puff imaging of plasma turbulence in the magnetic island scrape-off layer of W7-X
The turbulence characteristics of the scrape-off-layer (SOL) plasma in the W7-X stellarator are investigated using a gas-puff-imaging (GPI) diagnostic, newly installed and operated during the OP 2.1 campaign.The SOL plasma on W7-X features a set of 103 island divertors for heat and particle exhaust and provides a unique environment for studying SOL