Conceptual design of a heavy ion beam probe diagnostic for the Wendelstein 7-X Stellarator

H. Trimino Mora*, T. P. Crowley, D. R. Demers, P. J. Fimognari, O. Grulke, R. Laube

*Corresponding author for this work

Research output: Contribution to journalReviewpeer-review

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Abstract

This article describes the current state of the design of the heavy ion beam probe (HIBP) for Wendelstein 7-X (W7-X). It will be the first HIBP diagnostic on an optimized stellarator and is designed to study electric fields and ion scale turbulence in all W7-X reference magnetic configurations. The use of an existing 2 MV accelerator, located outside of the torus hall, results in the need for a circuitous primary beamline. This increases the complexity of the ion optics design to deliver a focused beam to the plasma. To access most of the magnetic configuration space of W7-X, the secondary beamline and an energy analyzer are designed to pivot, thereby redirecting a wider range of secondary beam trajectories. Signal level estimates indicate that the equilibrium potential can be measured at all radii and that the radial coverage for potential and density fluctuations measurements depends on the plasma density.
Original languageEnglish
Article number113309
JournalReview of Scientific Instruments
Volume93
Issue number11
Number of pages5
ISSN0034-6748
DOIs
Publication statusPublished - 2022

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