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

T. Odstrcil; F. M. Laggner; A. M. Rosenthal; A. Bortolon; J. W. Hughes; J. C. Spendlove; T. M. Wilks

doi:10.1063/5.0100988

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

T. Odstrcil
, F. M. Laggner
, A. M. Rosenthal
, A. Bortolon
, J. W. Hughes
, J. C. Spendlove
, T. M. Wilks

PPPL Tokamak Expermntl Science

Princeton University

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Article number	103503
Journal	Review of Scientific Instruments
Volume	93
Issue number	10
DOIs	https://doi.org/10.1063/5.0100988
State	Published - Oct 1 2022

ASJC Scopus subject areas

Instrumentation

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10.1063/5.0100988

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abstract = "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.",

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AU - Odstrcil, T.

AU - Laggner, F. M.

AU - Rosenthal, A. M.

AU - Bortolon, A.

AU - Hughes, J. W.

AU - Spendlove, J. C.

AU - Wilks, T. M.

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N2 - 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.

AB - 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.

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

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