Shallow pellet fuelling under conditions of RMP ELM mitigation or divertor detachment in ASDEX Upgrade

Shallow pellet fuelling under conditions of RMP ELM mitigation or divertor detachment in ASDEX Upgrade

Shallow pellet fuelling under conditions of RMP ELM mitigation or divertor detachment in ASDEX Upgrade 150 150 UKAEA Opendata
UKAEA-CCFE-CP(18)05

Shallow pellet fuelling under conditions of RMP ELM mitigation or divertor detachment in ASDEX Upgrade

M Valovic P T Lang A Kirk W Suttrop M Bernert M Cavedon M Dunne R Fischer L Garzotti L Guimarais F Janky N Leuthold PJ Mc Carthy A Mlynek B Plockl G Tardini E Viezzer E Wolfrum the ASDEX Upgrade team the EUROfusion MST1 team

Preprint

Pellets are used in ASDEX Upgrade [1] to control plasma density under conditions of ELM control or divertor detachment. In experiments presented here direct fuelling by gas is negligible. Relative pellet size and pellet deposition are aimed to approach those in ITER but differences still remain. ELMs are controlled by n=2 RMPs in feed forward mode [2]. Divertor detachment is controlled by nitrogen gas in feedback mode.

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45th European Physical Society Conference on Plasma Physics (EPS), Prague, 2-6 July 2018