Optimization of fast-ion diagnostic sets in tokamaks and stellarators using diagnostic weight functions

D. Moseev*, I. Kuzmych, H. Järleblad, S. A. Lazerson, M. Rud, A. Valentini, M. Salewski

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The fast-ion phase-space distribution function in the magnetic fusion devices is always underdiagnosed, and every new fast-ion diagnostic should be carefully assessed before installation to minimize redundancies in measurements and maximize the information from the yet undiagnosed part of the fast-ion phase space distribution function. Here, we present a novel method of assessing the added value of a considered fast-ion diagnostic, taking actual geometry and an existing set of fast-ion diagnostics into account. The new method is based on a reformulation of the diagnostic weight functions in constants of motion (COM). We compare the proposed method with the previous approach using Monte Carlo simulations.

Original languageEnglish
Article number103506
JournalReview of Scientific Instruments
Volume95
Issue number10
Number of pages6
ISSN0034-6748
DOIs
Publication statusPublished - 2024

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