Spatially resolved diagnostics for optimization of large ion beam sources

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Ideal and Resistive Impurity Parallel-velocity-gradient Instability

Jeanne Henriette Bourgeois

The presence of impurity ions in magnetically confined plasmas can significantly influence micro-instabilities, impacting cross-field transport and ultimately affecting fusion performance. In particular, Parallel Velocity Gradient (PVG) instability, common ...

IOP Publishing Ltd2025

Initial Results From the SPIDER Beamlet Current Diagnostic

Basile Marie Jacques Pouradier Duteil

Source for the production of ions of deuterium extracted from a radio frequency plasma (SPIDER) is the full-scale prototype for the ITER heating neutral beam (HNB) source. Beam operation in SPIDER, with the eventual aim of achieving 100-keV, 46-A hydrogen ...

2022

Collisionless losses of fast ions in the divertor tokamak test due to toroidal field ripple

Matteo Vallar

In this paper we analyze fast ion motion in the divertor tokamak test (DTT) device (Albanese et al 2017 Nucl. Fusion 57 016010). It is planned that DTT will be heated through a mix of 45 MW heating power, including 15 MW negative-ion-based neutral beam hea ...

IOP Publishing Ltd2021

Tail-tolerance as a Systems Principle not a Metric

Edouard Bugnion, Evangelos Marios Kogias

Tail-latency tolerance (or just simply tail-tolerance) is the ability for a system to deliver a response with low-latency nearly all the time. It it typically expressed as a system metric (e.g., the 99th or 99.99th percentile latency) or as a service-level ...

Assoc Computing Machinery2020