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
N1 - Funding Information:
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.
Publisher Copyright:
© 2018 Elsevier B.V.
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 - http://www.scopus.com/inward/record.url?scp=85057571211&partnerID=8YFLogxK
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 -
