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

Giuliana Sias; B. Cannas; A. Fanni; A. Murari; A. Pau; Leena Aho-Mantila; Antti Hakola; Juuso Karhunen; Antti Salmi; Tuomas Tala; Antti Hakola; Aki Lahtinen; Markus Airila; Aaro Jarvinen; Seppo Koivuranta; Jari Likonen; Paula Sirén; ASDEX Upgrade Team; EUROfusion MST1 Team; JET Contributors

doi:10.1016/j.fusengdes.2018.11.021

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

Giuliana Sias^*
, B. Cannas
, A. Fanni
, A. Murari
, A. Pau
, Leena Aho-Mantila
, Antti Hakola
, Juuso Karhunen
, Antti Salmi
, Tuomas Tala
, Antti Hakola
, Aki Lahtinen
, Markus Airila
, Aaro Jarvinen
, Seppo Koivuranta
, Jari Likonen
, Paula Sirén
, ASDEX Upgrade Team
, EUROfusion MST1 Team
, JET Contributors

^*Corresponding author for this work

University of Cagliari
University of Padua
Aalto University
University of Helsinki

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

20 Citations (Scopus)

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
Journal	Fusion Engineering and Design
Volume	138
DOIs	https://doi.org/10.1016/j.fusengdes.2018.11.021
Publication status	Published - 1 Jan 2019
MoE publication type	A1 Journal article-refereed

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.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Disruption indicators
Disruption prediction
Feature extraction
Locked mode signal
Tokamak

Access to Document

10.1016/j.fusengdes.2018.11.021

Cite this

Sias, G., Cannas, B., Fanni, A., Murari, A., Pau, A., Aho-Mantila, L., Hakola, A., Karhunen, J., Salmi, A., Tala, T., Hakola, A., Lahtinen, A., Airila, M., Jarvinen, A., Koivuranta, S., Likonen, J., Sirén, P., ASDEX Upgrade Team, EUROfusion MST1 Team, & JET Contributors (2019). A locked mode indicator for disruption prediction on JET and ASDEX upgrade. Fusion Engineering and Design, 138, 254-266. https://doi.org/10.1016/j.fusengdes.2018.11.021

@article{4eb72574576e42569439575c2b197bf4,

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 = "Giuliana Sias and B. Cannas and A. Fanni and A. Murari and A. Pau and Leena Aho-Mantila and Antti Hakola and Juuso Karhunen and Antti Salmi and Tuomas Tala and Antti Hakola and Aki Lahtinen and Markus Airila and Aaro Jarvinen and Seppo Koivuranta and Jari Likonen and Paula Sir{\'e}n and \{ASDEX Upgrade Team\} and \{EUROfusion MST1 Team\} and \{JET Contributors\}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

month = jan,

day = "1",

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

language = "English",

volume = "138",

pages = "254--266",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier",

}

Sias, G, Cannas, B, Fanni, A, Murari, A, Pau, A, Aho-Mantila, L , Hakola, A , Karhunen, J , Salmi, A , Tala, T , Hakola, A, Lahtinen, A, Airila, M , Jarvinen, A, Koivuranta, S, Likonen, J, Sirén, P, ASDEX Upgrade Team, EUROfusion MST1 Team & JET Contributors 2019, 'A locked mode indicator for disruption prediction on JET and ASDEX upgrade', Fusion Engineering and Design, vol. 138, pp. 254-266. https://doi.org/10.1016/j.fusengdes.2018.11.021

TY - JOUR

T1 - A locked mode indicator for disruption prediction on JET and ASDEX upgrade

AU - Sias, Giuliana

AU - Cannas, B.

AU - Fanni, A.

AU - Murari, A.

AU - Pau, A.

AU - Aho-Mantila, Leena

AU - Hakola, Antti

AU - Karhunen, Juuso

AU - Salmi, Antti

AU - Tala, Tuomas

AU - Hakola, Antti

AU - Lahtinen, Aki

AU - Airila, Markus

AU - Jarvinen, Aaro

AU - Koivuranta, Seppo

AU - Likonen, Jari

AU - Sirén, Paula

AU - ASDEX Upgrade Team

AU - EUROfusion MST1 Team

AU - JET Contributors

PY - 2019/1/1

Y1 - 2019/1/1

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

Funding

UN SDGs

Keywords

Access to Document

Other files and links

Fingerprint

Cite this