ELM pacing and high-density operation using pellet injection in the ASDEX Upgrade all-metal-wall tokamak

PT Lang, A Burckhart, M Bernert, L Casali… - Nuclear …, 2014 - iopscience.iop.org
Edge-localized mode (ELM) triggering and pacing in an all-metal wall environment shows
significant differences to a first-wall configuration containing carbon. Here we report on …

ELM pace making and mitigation by pellet injection in ASDEX Upgrade

PT Lang, GD Conway, T Eich, L Fattorini… - Nuclear …, 2004 - iopscience.iop.org
In ASDEX Upgrade, experimental efforts aim to establish pace making and mitigation of type-
I edge localized modes (ELMs) in high confinement mode (H-mode) discharges. Injection of …

ELM triggering by local pellet perturbations in type-I ELMy H-mode plasma at JET

PT Lang, B Alper, R Buttery, K Gal, J Hobirk… - Nuclear …, 2007 - iopscience.iop.org
The pellet pacing ELM control concept developed at the mid-sized tokamak ASDEX
Upgrade is considered for the larger machines JET and ITER as well. By driving up the ELM …

ELM control at the L→ H transition by means of pellet pacing in the ASDEX Upgrade and JET all-metal-wall tokamaks

PT Lang, H Meyer, G Birkenmeier… - Plasma Physics and …, 2015 - iopscience.iop.org
In ITER, pellets are used for ELM pacing and fueling. More importantly, ELM control and in
particular control of the first ELM needs to be demonstrated in the non-nuclear phase of …

Impact of lithium pellets on plasma performance in the ASDEX Upgrade all-metal-wall tokamak

PT Lang, R Maingi, DK Mansfield, RM McDermott… - Nuclear …, 2016 - iopscience.iop.org
The impact of lithium (Li) on plasma performance was investigated at the ASDEX Upgrade
tokamak, which features a full tungsten wall. Li pellets containing 1.6× 10 20 Li atoms were …

ELM frequency control by continuous small pellet injection in ASDEX Upgrade

PT Lang, J Neuhauser, LD Horton, T Eich… - Nuclear …, 2003 - iopscience.iop.org
Injection of cryogenic deuterium pellets has been successfully applied in ASDEX Upgrade
for external edge localized mode (ELM) frequency control in type-I ELMy H-mode discharge …

ELM pacing and trigger investigations at JET with the new ITER-like wall

PT Lang, D Frigione, A Géraud, T Alarcon… - Nuclear …, 2013 - iopscience.iop.org
During the installation of the new ITER-like wall (ILW) at JET, the high frequency pellet
injector has been further improved. The launching system is now capable of delivering …

High-density H-mode operation by pellet injection and ELM mitigation with the new active in-vessel saddle coils in ASDEX Upgrade

PT Lang, W Suttrop, E Belonohy, M Bernert… - Nuclear …, 2012 - iopscience.iop.org
Recent experiments at ASDEX Upgrade demonstrate the compatibility of ELM mitigation by
magnetic perturbations with efficient particle fuelling by inboard pellet injection. ELM …

Fully pellet-controlled ELMs sustaining identical pedestal conditions of natural ELMy H-mode in ASDEX Upgrade

H Urano, W Suttrop, PT Lang, LD Horton… - Plasma physics and …, 2004 - iopscience.iop.org
For identical edge pedestal conditions in plasmas with gas puff and with pellet injection,
edge localized mode (ELM) mitigation during fully pellet-controlled ELMy H-modes has …

Density control by pellets in plasmas with ELM mitigation by RMPs in the ASDEX Upgrade tokamak

M Valovič, PT Lang, A Kirk, W Suttrop… - Plasma Physics and …, 2018 - iopscience.iop.org
This paper describes the extension of the previous experimental database on density control
by pellets and ELM control by RMPs in the ASDEX Upgrade tokamak. A stationary low …