A multi-cavity approach for enhanced efficiency in TOPICA RF antenna code

D. Milanesio, O. Meneghini, V. Lancellotti, R. Maggiora, G. Vecchi

Research output: Contribution to journalArticleAcademicpeer-review

27 Citations (Scopus)
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Abstract

This paper describes recent upgrades of TOPICA (Torino Politecnico Ion Cyclotron Antennas) formulation and implementation. TOPICA is a code capable of handling both the actual geometry of ion cyclotron (IC) antennas and an accurate plasma description; it can predict the performances of IC launchers with an unprecedented accuracy and numerical efficiency, validated against data measured in plasma operation conditions. In the reported upgrade, a new multi-cavity approach is introduced, producing significant savings in terms of CPU and memory requirements and allowing the analysis of large antennas even with limited computational resources. In fact, by formally separating the structure's cavities with a number of mathematical surfaces called 'apertures', the method of moments interaction matrix is block-wise sparse and, as a consequence, can be manipulated with a far higher numerical efficiency; this also allows an out-of-core solution.
Original languageEnglish
Article number115019
Pages (from-to)115019-1-10
Number of pages10
JournalNuclear Fusion
Volume49
Issue number11
DOIs
Publication statusPublished - 2009

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