A brief history of negative triangularity tokamak plasmas

A Marinoni, O Sauter, S Coda - Reviews of Modern Plasma Physics, 2021 - Springer
This review is devoted to tokamak plasmas with a cross sectional shape featuring negative
triangularity, which appear to hold great promise as a candidate reactor configuration owing …

Progress in the development and understanding of a high poloidal-beta tokamak operating scenario for an attractive fusion pilot plant

S Ding, AM Garofalo - Reviews of Modern Plasma Physics, 2022 - Springer
The high poloidal-beta (β P) regime was first proposed as a high bootstrap current scenario
for a steady-state fusion pilot plant (FPP) in the 1990s (Kikuchi in Nucl Fusion 30: 265 …

Robust avoidance of edge-localized modes alongside gradient formation in the negative triangularity tokamak edge

AO Nelson, L Schmitz, C Paz-Soldan, KE Thome… - Physical Review Letters, 2023 - APS
In a series of high performance diverted discharges on DIII-D, we demonstrate that strong
negative triangularity (NT) sha** robustly suppresses all edge-localized mode (ELM) …

Diverted negative triangularity plasmas on DIII-D: the benefit of high confinement without the liability of an edge pedestal

A Marinoni, ME Austin, AW Hyatt, S Saarelma… - Nuclear …, 2021 - iopscience.iop.org
Diverted discharges at negative triangularity on the DIII-D tokamak sustain normalized
confinement and pressure levels typical of standard H-mode scenarios (H 98y2≃ 1, β N≃ 3) …

Overview of results from the 2023 DIII-D negative triangularity campaign

KE Thome, ME Austin, A Hyatt, A Marinoni… - Plasma Physics and …, 2024 - iopscience.iop.org
Negative triangularity (NT) is a potentially transformative configuration for tokamak-based
fusion energy with its high-performance core, edge localized mode (ELM)-free edge, and …

Enhanced confinement in diverted negative-triangularity L-mode plasmas in TCV

S Coda, A Merle, O Sauter, L Porte… - Plasma Physics and …, 2021 - iopscience.iop.org
The favorable confinement properties of negative-triangularity (NT) tokamak configurations
were discovered in the TCV tokamak in the late 1990s and were documented over the two …

Ballooning instability preventing the H-mode access in plasmas with negative triangularity shape on the DIII–D tokamak

S Saarelma, ME Austin, M Knolker… - Plasma Physics and …, 2021 - iopscience.iop.org
Infinite toroidal mode number (n=∞) ballooning mode analysis of negative triangularity
discharges on DIII–D shows that the access to 2 nd stability becomes strongly restricted …

First-principle based predictions of the effects of negative triangularity on DTT scenarios

A Mariani, A Balestri, P Mantica, G Merlo… - Nuclear …, 2024 - iopscience.iop.org
Plasmas with negative triangularity (NT) shape have been recently shown to be able to
achieve H-mode levels of confinement in L-mode, avoiding detrimental edge localised …

Physical insights from the aspect ratio dependence of turbulence in negative triangularity plasmas

A Balestri, J Ball, S Coda, DJ Cruz-Zabala… - Plasma Physics and …, 2024 - iopscience.iop.org
In this work, we study the impact of aspect ratio A= R0/r (the ratio of major radius R0 to minor
radius r) on the confinement benefits of Negative Triangularity (NT) plasma sha**. We use …