@article{5e7369d057e741e7b4660608a01ca872,
title = "Analysis of the outer divertor hot spot activity in the protection video camera recordings at JET",
abstract = "Hot spots on the divertor tiles at JET result in overestimation of the tile surface temperature which causes unnecessary termination of pulses. However, the appearance of hot spots can also indicate the condition of the divertor tile surfaces. To analyse the behaviour of the hot spots in the outer divertor tiles of JET, a simple image processing algorithm is developed. The algorithm isolates areas of bright pixels in the camera image and compares them to previously identified hot spots. The activity of the hot spots is then linked to values of other signals and parameters in the same time intervals. The operation of the detection algorithm was studied in a limited pulse range with high hot spot activity on the divertor tiles 5, 6 and 7. This allowed us to optimise the values of the controlling parameters. Then, the wider applicability of the method has been demonstrated by the analysis of the hot spot behaviour in a whole experimental campaign.",
keywords = "ITER-like wall, Image analysis, JET, Plasma-wall interaction",
author = "{the JET contributors} and A. Drenik and S. Brezinsek and P. Carvalho and V. Huber and N. Osterman and Matthews, {G. F.} and M. Nemec and X. Litaudon and S. Abduallev and M. Abhangi and P. Abreu and M. Afzal and Aggarwal, {K. M.} and T. Ahlgren and Ahn, {J. H.} and L. Aho-Mantila and N. Aiba and M. Airila and R. Albanese and V. Aldred and D. Alegre and E. Alessi and P. Aleynikov and A. Alfier and A. Alkseev and M. Allinson and B. Alper and E. Alves and G. Ambrosino and R. Ambrosino and L. Amicucci and V. Amosov and {Andersson Sunden}, E. and M. Angelone and K. Crombe and P. Dumortier and F. Durodie and S. Jachmich and Y. Kazakov and A. Krivska and E. Lerche and A. Lyssoivan and A. Messiaen and S. Moradi and J. Ongena and R. Ragona and I. Stepanov and {Van Eester}, D. and G. Verdoolaege and T. Wauters",
note = "Publisher Copyright: {\textcopyright} 2018",
year = "2019",
month = feb,
day = "1",
doi = "10.1016/j.fusengdes.2018.12.079",
language = "English",
volume = "139",
pages = "115--123",
journal = "Fusion Engineering and Design",
issn = "0920-3796",
}