A locked mode indicator for disruption prediction on JET and ASDEX upgrade

the ASDEX Upgrade Team; the EUROfusion MST1 Team; the JET contributors; the EUROfusion MST1 Team

doi:10.1016/j.fusengdes.2018.11.021

A locked mode indicator for disruption prediction on JET and ASDEX upgrade

the ASDEX Upgrade Team
, the EUROfusion MST1 Team
, the JET contributors
, the EUROfusion MST1 Team

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

20 Scopus citations

Abstract

The aim of this paper is to present a signal processing algorithm that, applied to the raw Locked Mode signal, allows us to obtain a disruption indicator in principle exploitable on different tokamaks. A common definition of such an indicator for different machines would facilitate the development of portable systems for disruption prediction, which is becoming of increasingly importance for the next tokamak generations. Moreover, the indicator allows us to overcome some intrinsic problems in the diagnostic system such as drift and offset. The behavior of the proposed indicator as disruption predictor, based on crossing optimized thresholds of the signal amplitude, has been analyzed using data of both JET and ASDEX Upgrade experiments. A thorough analysis of the disruption prediction performance shows how the indicator is able to recover some missed and tardy detections of the raw signal. Moreover, it intervenes and corrects premature or even wrong alarms due to, e.g., drifts and/or offsets.

Original language	English
Pages (from-to)	254-266
Number of pages	13
Journal	Fusion Engineering and Design
Volume	138
DOIs	https://doi.org/10.1016/j.fusengdes.2018.11.021
State	Published - Jan 1 2019

Funding

This work has been carried out within the framework of the EUROfusion Consortium and received funding from the EURATOM research and training programme 2014–2018 under grant agreement No 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Keywords

Disruption indicators
Disruption prediction
Feature extraction
Locked mode signal
Tokamak

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10.1016/j.fusengdes.2018.11.021

Cite this

@article{6573eccf73114f93af22d3fbe11eaec8,

title = "A locked mode indicator for disruption prediction on JET and ASDEX upgrade",

abstract = "The aim of this paper is to present a signal processing algorithm that, applied to the raw Locked Mode signal, allows us to obtain a disruption indicator in principle exploitable on different tokamaks. A common definition of such an indicator for different machines would facilitate the development of portable systems for disruption prediction, which is becoming of increasingly importance for the next tokamak generations. Moreover, the indicator allows us to overcome some intrinsic problems in the diagnostic system such as drift and offset. The behavior of the proposed indicator as disruption predictor, based on crossing optimized thresholds of the signal amplitude, has been analyzed using data of both JET and ASDEX Upgrade experiments. A thorough analysis of the disruption prediction performance shows how the indicator is able to recover some missed and tardy detections of the raw signal. Moreover, it intervenes and corrects premature or even wrong alarms due to, e.g., drifts and/or offsets.",

keywords = "Disruption indicators, Disruption prediction, Feature extraction, Locked mode signal, Tokamak",

author = "\{the ASDEX Upgrade Team\} and \{the EUROfusion MST1 Team\} and \{the JET contributors\} and \{the EUROfusion MST1 Team\} and G. Sias and B. Cannas and A. Fanni and A. Murari and A. Pau and A. Kallenbach and D. Aguiam and L. Aho-Mantila and C. Angioni and N. Arden and \{Arredondo Parra\}, R. and O. Asunta and \{de Baar\}, M. and M. Balden and K. Behler and A. Bergmann and J. Bernardo and M. Bernert and M. Beurskens and A. Biancalani and R. Bilato and G. Birkenmeier and V. Bobkov and A. Bock and A. Bogomolov and T. Bolzonella and B. Boeswirth and C. Bottereau and A. Bottino and \{van den Brand\}, H. and S. Brezinsek and D. Brida and F. Brochard and C. Bruhn and J. Buchanan and A. Buhler and A. Burckhart and D. Cambon-Silva and \{Paradela Perez\}, I. and W. Tierens and B. Lomanowski and L. Baylor and T. Biewer and R. Goulding and R. Grove and M. Kaufman and C. Klepper and S. Meitner and J. Risner and Wilson, \{H. R.\}",

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doi = "10.1016/j.fusengdes.2018.11.021",

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AU - the ASDEX Upgrade Team

AU - the EUROfusion MST1 Team

AU - the JET contributors

AU - the EUROfusion MST1 Team

AU - Sias, G.

AU - Cannas, B.

AU - Fanni, A.

AU - Murari, A.

AU - Pau, A.

AU - Kallenbach, A.

AU - Aguiam, D.

AU - Aho-Mantila, L.

AU - Angioni, C.

AU - Arden, N.

AU - Arredondo Parra, R.

AU - Asunta, O.

AU - de Baar, M.

AU - Balden, M.

AU - Behler, K.

AU - Bergmann, A.

AU - Bernardo, J.

AU - Bernert, M.

AU - Beurskens, M.

AU - Biancalani, A.

AU - Bilato, R.

AU - Birkenmeier, G.

AU - Bobkov, V.

AU - Bock, A.

AU - Bogomolov, A.

AU - Bolzonella, T.

AU - Boeswirth, B.

AU - Bottereau, C.

AU - Bottino, A.

AU - van den Brand, H.

AU - Brezinsek, S.

AU - Brida, D.

AU - Brochard, F.

AU - Bruhn, C.

AU - Buchanan, J.

AU - Buhler, A.

AU - Burckhart, A.

AU - Cambon-Silva, D.

AU - Paradela Perez, I.

AU - Tierens, W.

AU - Lomanowski, B.

AU - Baylor, L.

AU - Biewer, T.

AU - Goulding, R.

AU - Grove, R.

AU - Kaufman, M.

AU - Klepper, C.

AU - Meitner, S.

AU - Risner, J.

AU - Wilson, H. R.

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N2 - The aim of this paper is to present a signal processing algorithm that, applied to the raw Locked Mode signal, allows us to obtain a disruption indicator in principle exploitable on different tokamaks. A common definition of such an indicator for different machines would facilitate the development of portable systems for disruption prediction, which is becoming of increasingly importance for the next tokamak generations. Moreover, the indicator allows us to overcome some intrinsic problems in the diagnostic system such as drift and offset. The behavior of the proposed indicator as disruption predictor, based on crossing optimized thresholds of the signal amplitude, has been analyzed using data of both JET and ASDEX Upgrade experiments. A thorough analysis of the disruption prediction performance shows how the indicator is able to recover some missed and tardy detections of the raw signal. Moreover, it intervenes and corrects premature or even wrong alarms due to, e.g., drifts and/or offsets.

AB - The aim of this paper is to present a signal processing algorithm that, applied to the raw Locked Mode signal, allows us to obtain a disruption indicator in principle exploitable on different tokamaks. A common definition of such an indicator for different machines would facilitate the development of portable systems for disruption prediction, which is becoming of increasingly importance for the next tokamak generations. Moreover, the indicator allows us to overcome some intrinsic problems in the diagnostic system such as drift and offset. The behavior of the proposed indicator as disruption predictor, based on crossing optimized thresholds of the signal amplitude, has been analyzed using data of both JET and ASDEX Upgrade experiments. A thorough analysis of the disruption prediction performance shows how the indicator is able to recover some missed and tardy detections of the raw signal. Moreover, it intervenes and corrects premature or even wrong alarms due to, e.g., drifts and/or offsets.

KW - Disruption indicators

KW - Disruption prediction

KW - Feature extraction

KW - Locked mode signal

KW - Tokamak

UR - https://www.scopus.com/pages/publications/85057571211

U2 - 10.1016/j.fusengdes.2018.11.021

DO - 10.1016/j.fusengdes.2018.11.021

M3 - Article

AN - SCOPUS:85057571211

SN - 0920-3796

VL - 138

SP - 254

EP - 266

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

A locked mode indicator for disruption prediction on JET and ASDEX upgrade

Abstract

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Keywords

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