149 citations · 894 across the 21 of their papers we have counts for
21 papers
Initial observations in X-point target divertor discharges on MAST-U
N. Lonigro, K. Verhaegh, J. Harrison +14
The first high-power (> 3 MW) H-mode experiments using a double-null X-point-target (XPT) divertor configuration have been performed on MAST-U. The XPT geometry is obtained by comb…
First data and preliminary experimental results from a new Doppler Backscattering system on the MAST-U spherical tokamak
P. Shi, R. Scannell, J. Wen +7
A new Doppler backscattering (DBS) system, consisting of Q-band and V-band, has been installed and achieved its first data on the MAST-U spherical tokamak. The Q-band and V-band ha…
Effect of mismatch on Doppler backscattering in MAST and MAST-U plasmas
Valerian H. Hall-Chen, Felix I. Parra, Jon C. Hillesheim +14
The Doppler backscattering (DBS) diagnostic, also referred to as Doppler reflectometry, measures turbulent density fluctuations of intermediate length scales. However, when the bea…
Overview of recent physics results from MAST
A Kirk, J Adamek, RJ Akers +160
New results from MAST are presented that focus on validating models in order to extrapolate to future devices. Measurements during start-up experiments have shown how the bulk ion…
Pellet refuelling of particle loss due to ELM mitigation with RMPs in the ASDEX Upgrade tokamak at low collisionality
M Valovič, P T Lang, A Kirk +17
The complete refuelling of the plasma density loss (pump-out) caused by mitigation of Edge Localised Modes (ELMs) is demonstrated on the ASDEX Upgrade tokamak. The plasma is refuel…
Characterisation of the L-mode Scrape Off Layer in MAST: decay lengths
F. Militello, L. Garzotti, J. Harrison +7
This work presents a detailed characterisation of the MAST Scrape Off Layer in L-mode. Scans in line averaged density, plasma current and toroidal magnetic field were performed. A…
Electron and ion heating characteristics during magnetic reconnection in MAST
H. Tanabe, T. Yamada, T. Watanabe +16
Local electron and ion heating characteristics during merging reconnection startup on the MAST spherical tokamak have been revealed for the first time using a 130 channel YAG-TS sy…
Effect of resonant magnetic perturbations on low collisionality discharges in MAST and a comparison with ASDEX Upgrade
A. Kirk, W. Suttrop, Yueqiang Liu +19
Sustained ELM mitigation has been achieved on MAST and AUG using RMPs with a range of toroidal mode numbers over a wide region of low to medium collisionality discharges. The ELM e…
Impact of Resonant Magnetic Perturbations on the L-H Transition on MAST
R. Scannell, A. Kirk, M. Carr +7
The impact of resonant magnetic perturbations (RMPs) on the power required to access H-mode is examined experimentally on MAST. Applying RMP in n=2,3,4 and 6 configurations causes…
Dependence of intrinsic rotation reversals on collisionality in MAST
J. C. Hillesheim, F. I. Parra, M. Barnes +6
Tokamak plasmas rotate even without external injection of momentum. A Doppler backscattering system installed at MAST has allowed this intrinsic rotation to be studied in Ohmic L-m…
Microstability analysis of pellet fuelled discharges in MAST
L. Garzotti, J. Figueiredo, C. M. Roach +7
Reactor grade plasmas are likely to be fuelled by pellet injection. This technique transiently perturbs the profiles, driving the density profile hollow and flattening the edge tem…
MAST-Upgrade Divertor Facility and Assessing Performance of Long-Legged Divertors
G. Fishpool, J. Canik, G. Cunningham +7
A potentially important feature in a divertor design for a high-power tokamak is an extended and expanded divertor leg. The upgrade to MAST will allow a wide range of such divertor…
Understanding ELM mitigation by resonant magnetic perturbations on MAST
A. Kirk, I. T. Chapman, Yueqiang Liu +11
Sustained ELM mitigation has been achieved using RMPs with a toroidal mode number of n=4 and n=6 in lower single null and with n=3 in connected double null plasmas on MAST. The ELM…
Towards understanding edge localised mode mitigation by resonant magnetic perturbations in MAST
I. T. Chapman, A. Kirk, C. J. Ham +10
Type-I Edge Localised Modes (ELMs) have been mitigated in MAST through the application of n = 3, 4 and 6 resonant magnetic perturbations (RMPs). For each toroidal mode number of th…
Effect of resonant magnetic perturbations with toroidal mode numbers of 4 and 6 on ELMs in single null H-mode plasmas in MAST
A. Kirk, I. T. Chapman, J. Harrison +6
The application of resonant magnetic perturbations (RMPs) with a toroidal mode number of n=4 or n=6 to lower single null plasmas in the MAST tokamak produces up to a factor of 5 in…
Pellet fuelling of plasmas with ELM mitigation by resonant magnetic perturbations in MAST
M Valovic, G Cunningham, L Garzotti +6
Shallow fuelling pellets are injected from the high field side into plasmas in which ELMs have been mitigated using external magnetic perturbation coils. The data are compared with…
Inter-ELM pedestal evolution on MAST and impact of Resonant Magnetic Perturbations
R. Scannell, A. Kirk, I. T. Chapman
The peak pressure gradient in the pedestal (dPe/dψ) on MAST varies little between edge localized modes (ELMs), although it varies between discharges due factors such as gas fuellin…
Effect of resonant magnetic perturbations on ELMs in connected double null plasmas in MAST
A. Kirk, Yueqiang Liu, I. T. Chapman +5
The application of resonant magnetic perturbations (RMPs) with a toroidal mode number of n=3 to connected double null plasmas in the MAST tokamak produces up to a factor of 9 incre…
Microtearing modes at the top of the pedestal
D. Dickinson, C. M. Roach, S. Saarelma +3
Microtearing modes (MTMs) are unstable in the shallow gradient region just inside the top of the pedestal in the spherical tokamak experiment MAST, and may play an important role i…
Kinetic instabilities that limit β in the edge of a tokamak plasma: a picture of an H-mode pedestal
D. Dickinson, C. M. Roach, S. Saarelma +3
Plasma equilibria reconstructed from the Mega-Amp Spherical Tokamak (MAST) have sufficient resolution to capture plasma evolution during the short period between edge-localized mod…
Towards the construction of a model to describe the inter-ELM evolution of the pedestal on MAST
D. Dickinson, S. Saarelma, R. Scannell +3
Pedestal profiles that span the ELM cycle have been obtained and used to test the idea that the pedestal pressure gradient in MAST is limited by the onset of Kinetic Ballooning Mod…