Results 21 to 30 of about 1,116 (155)

Disruption Mitigation in Tokamaks with Shattered Pellet Injection [PDF]

open access: yes, 2021
The sudden loss of confinement of the energy content of fusion plasmas in off-normal events, called disruptions, are among the most severe threats to the future of fusion energy based on the tokamak design.
Vallhagen, Oskar
core   +1 more source

Drift of ablated material after pellet injection in a tokamak [PDF]

open access: yes, 2023
Pellet injection is used for fuelling and controlling discharges in tokamaks, and it is foreseen in ITER. During pellet injection, a movement of the ablated material towards the low-field side (or outward major radius direction) occurs because of the ...
F\ufcl\uf6p, T\ufcnde   +4 more
core   +3 more sources

On the mechanisms governing gas penetration into a tokamak plasma during a massive gas injection [PDF]

open access: yes, 2016
A new 1D radial fluid code, IMAGINE, is used to simulate the penetration of gas into a tokamak plasma during a massive gas injection (MGI). The main result is that the gas is in general strongly braked as it reaches the plasma, due to mechanisms related ...
Abhangi, M.   +1112 more
core   +2 more sources

‘Escaping Isn't for Everyone’: Kurdish Smugglers’ Navigational Tactics at Checkpoints in Iran

open access: yesDevelopment and Change, EarlyView.
ABSTRACT This article examines how Kurdish smugglers navigate state and insurgent checkpoints in the borderlands of western Iran. Drawing on ethnographic research, it analyses two key navigational tactics: persin, a form of negotiated passage involving transaction, recognition and the contingent toleration of authority; and jimi, rendered here as ...
Peyman Zinati
wiley   +1 more source

Non-linear MHD modeling of shattered pellet injection in ASDEX Upgrade

open access: yesNuclear Fusion
Shattered pellet injection (SPI) is selected for the disruption mitigation system in ITER, due to deeper penetration, expected assimilation efficiency and prompt material delivery.
W. Tang   +13 more
doaj   +1 more source

Concealed coexistence: Reproductive choice and coercion in Timor‐Leste

open access: yesMedical Anthropology Quarterly, EarlyView.
Abstract Choice is a central concept in reproductive rights. However, a discourse of choice in reproductive health can also mask precisely the act it aims to protect against: coercion. Whilst choice has been explored extensively in studies of reproductive rights and justice, understandings of coercion are fragmented and under‐theorized.
Laura Burke
wiley   +1 more source

Impact of impurity seeding on shattered pellet injection mitigations on the Joint European Torus

open access: yesNuclear Fusion
Plasma disruptions present a significant challenge to the viability of fusion energy production in tokamak reactors. Among disruption mitigation techniques, shattered pellet injection (SPI) has emerged as a promising approach.
U. Sheikh   +11 more
doaj   +1 more source

A Review of the Unintended Consequences of Biochar in Various Applications

open access: yesAdvanced Energy and Sustainability Research, Volume 7, Issue 5, May 2026.
Biochar is widely promoted as a sustainable material for applications ranging from soil amendment to energy storage and construction materials. This review critically examines the often‐overlooked and unintended consequences of biochar, including variability in properties, safety risks, and performance limitations.
Singaravelu Vivekanandhan   +14 more
wiley   +1 more source

Impact of breech geometry and propellant flow on the release of large pellets for the ITER disruption mitigation system

open access: yesNuclear Fusion
Studies have been performed on the release mechanism for large pellets using high pressure gas in a shattered pellet injector. Typically, pellets are dislodged from the cryogenic surface and accelerated down a barrel using high pressure gas delivered by ...
T.E. Gebhart   +11 more
doaj   +1 more source

Unravelling Rheology and Structural Properties of Polysaccharides from Porphyridium Purpureum After Alkali Pre‐Treatment

open access: yesMacromolecular Bioscience, Volume 26, Issue 3, March 2026.
Porphyridium purpureum polysaccharides are established hydrocolloids among several microalgal biomolecules, however they only exhibit higher viscosity without gelling capacity. Therefore, this study chose to employ alkali pretreatment to Porphyridium purpureum to investigate whether controlled chemical modification could alter the molecular structure ...
Farjana Akter   +5 more
wiley   +1 more source

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