Robust identification of multiple-input single-output system response for efficient pickup noise removal from tokamak diagnostics

Autor:	T. Odstrcil, F. M. Laggner, A. M. Rosenthal, A. Bortolon, J. W. Hughes, J. C. Spendlove, T. M. Wilks
Rok vydání:	2022
Předmět:	Instrumentation
Zdroj:	Review of Scientific Instruments. 93:103503
ISSN:	1089-7623 0034-6748
DOI:	10.1063/5.0100988
Popis:	Electromagnetic pickup noise in the tokamak environment imposes an imminent challenge for measuring weak diagnostic photocurrents in the nA range. The diagnostic signal can be contaminated by an unknown mixture of crosstalk signals from coils powered by currents in the kA range. To address this issue, an algorithm for robust identification of linear multi-input single-output (MISO) systems has been developed. The MISO model describes the dynamic relationship between measured signals from power sources and observed signals in the diagnostic and allows for a precise subtraction of the noise component. The proposed method was tested on experimental diagnostic data from the DIII-D tokamak, and it has reduced noise by up to 20 dB in the 1–20 kHz range.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5faa8c5dcadd5ec21c20248676d6cfe6 https://doi.org/10.1063/5.0100988 Zobrazit plný text záznamu