Development of Laser Based Techniques for In-situ Characterization of the First Wall in ITER and Future Fusion Devices

V. Phillips, A. Malaquias, Antti Hakola, G. Maddaluno, P. Gasior, M. Laan, H. van der Meiden, M. Rubel, S. Almaviva, L. Caneve, F. Colao, N. Gierse, A. Huber, B. Schweer, M. Zlobinski, A. Czarnecka, M. Kubowska, P. Petersson

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

In situ methods to measure the fuel retention and to characterize the material deposition on the wall are highly important for ITER and future fusion devices. Laser-based methods are the most promising candidates (for non-invasive applications) and their feasibility is assessed in a cooperative undertaking in various European associations under EFDA coordination. The work concentrates on three different laser techniques in which the laser light is guided from outside the biological shield by a mirror system through a window onto special wall areas: i) laser induced desorption spectroscopy (LIDS) in which ms laser pulses thermally desorbs the retained fuel from a wall area of about 1cm2 and this fuel is spectroscopically detected in the edge of a running plasma, ii) laser induced ablation spectroscopy (LIAS) in which ns laser pulses ablates material from a small wall spot and the ablated material together with the incorporated fuel is detected in a similar way as in LIDS and iii) laser induced breakdown spectroscopy (LIBS) in which ns (or even ps ) laser pulses produce in front of the irradiated wall spot a plasma plume which (in proper conditions) emits line radiation being a fingerprint of the chemical composition of the ablated materials. The aims are to compare the pros and cons of the methods and propose an optimized solution for ITER. LIDS and LIAS have been developed in the TEXTOR tokamak to a prototype-like status for application in ITER. LIBS has been investigated in several EU laboratories in dedicated lab experiments with a focus on the particular conditions in ITER, including pilot experiments in the TEXTOR tokamak. To enable a clear and fair quantification of the methods, standard deposits of diamond like carbon (DLC) and mixed W/Al/C (with Al mimicing Be) with thicknesses of 2-3 μm deposited on rough and polished W substrates with a known D inventory were prepared using magnetron sputtering and vacuum arc deposition. They were used as reference samples in studies
Original languageEnglish
Title of host publicationProgramme, Abstracts, Presentations & Proceedings
Subtitle of host publication24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA
PublisherInternational Atomic Energy Agency IAEA
Publication statusPublished - 2012
MoE publication typeA4 Article in a conference publication
Event24th IAEA Fusion Energy Conference - San Diego, United States
Duration: 8 Oct 201213 Oct 2012
http://www-naweb.iaea.org/napc/physics/FEC/FEC2012/html/proceedings.pdf (Full proceedings)

Conference

Conference24th IAEA Fusion Energy Conference
CountryUnited States
CitySan Diego
Period8/10/1213/10/12
Internet address

Fingerprint

fusion
lasers
laser-induced breakdown spectroscopy
spectroscopy
desorption
ablation
pulses
laser plasmas
plumes
magnetron sputtering
chemical composition
arcs
diamonds
deposits
prototypes
mirrors
vacuum
carbon
radiation

Cite this

Phillips, V., Malaquias, A., Hakola, A., Maddaluno, G., Gasior, P., Laan, M., ... Petersson, P. (2012). Development of Laser Based Techniques for In-situ Characterization of the First Wall in ITER and Future Fusion Devices. In Programme, Abstracts, Presentations & Proceedings: 24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA [ EX/P5-14] International Atomic Energy Agency IAEA.
Phillips, V. ; Malaquias, A. ; Hakola, Antti ; Maddaluno, G. ; Gasior, P. ; Laan, M. ; van der Meiden, H. ; Rubel, M. ; Almaviva, S. ; Caneve, L. ; Colao, F. ; Gierse, N. ; Huber, A. ; Schweer, B. ; Zlobinski, M. ; Czarnecka, A. ; Kubowska, M. ; Petersson, P. / Development of Laser Based Techniques for In-situ Characterization of the First Wall in ITER and Future Fusion Devices. Programme, Abstracts, Presentations & Proceedings: 24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA. International Atomic Energy Agency IAEA, 2012.
@inproceedings{61f06ce04a4545f483c816784275b9d1,
title = "Development of Laser Based Techniques for In-situ Characterization of the First Wall in ITER and Future Fusion Devices",
abstract = "In situ methods to measure the fuel retention and to characterize the material deposition on the wall are highly important for ITER and future fusion devices. Laser-based methods are the most promising candidates (for non-invasive applications) and their feasibility is assessed in a cooperative undertaking in various European associations under EFDA coordination. The work concentrates on three different laser techniques in which the laser light is guided from outside the biological shield by a mirror system through a window onto special wall areas: i) laser induced desorption spectroscopy (LIDS) in which ms laser pulses thermally desorbs the retained fuel from a wall area of about 1cm2 and this fuel is spectroscopically detected in the edge of a running plasma, ii) laser induced ablation spectroscopy (LIAS) in which ns laser pulses ablates material from a small wall spot and the ablated material together with the incorporated fuel is detected in a similar way as in LIDS and iii) laser induced breakdown spectroscopy (LIBS) in which ns (or even ps ) laser pulses produce in front of the irradiated wall spot a plasma plume which (in proper conditions) emits line radiation being a fingerprint of the chemical composition of the ablated materials. The aims are to compare the pros and cons of the methods and propose an optimized solution for ITER. LIDS and LIAS have been developed in the TEXTOR tokamak to a prototype-like status for application in ITER. LIBS has been investigated in several EU laboratories in dedicated lab experiments with a focus on the particular conditions in ITER, including pilot experiments in the TEXTOR tokamak. To enable a clear and fair quantification of the methods, standard deposits of diamond like carbon (DLC) and mixed W/Al/C (with Al mimicing Be) with thicknesses of 2-3 μm deposited on rough and polished W substrates with a known D inventory were prepared using magnetron sputtering and vacuum arc deposition. They were used as reference samples in studies",
author = "V. Phillips and A. Malaquias and Antti Hakola and G. Maddaluno and P. Gasior and M. Laan and {van der Meiden}, H. and M. Rubel and S. Almaviva and L. Caneve and F. Colao and N. Gierse and A. Huber and B. Schweer and M. Zlobinski and A. Czarnecka and M. Kubowska and P. Petersson",
year = "2012",
language = "English",
booktitle = "Programme, Abstracts, Presentations & Proceedings",
publisher = "International Atomic Energy Agency IAEA",
address = "Austria",

}

Phillips, V, Malaquias, A, Hakola, A, Maddaluno, G, Gasior, P, Laan, M, van der Meiden, H, Rubel, M, Almaviva, S, Caneve, L, Colao, F, Gierse, N, Huber, A, Schweer, B, Zlobinski, M, Czarnecka, A, Kubowska, M & Petersson, P 2012, Development of Laser Based Techniques for In-situ Characterization of the First Wall in ITER and Future Fusion Devices. in Programme, Abstracts, Presentations & Proceedings: 24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA., EX/P5-14, International Atomic Energy Agency IAEA, 24th IAEA Fusion Energy Conference, San Diego, United States, 8/10/12.

Development of Laser Based Techniques for In-situ Characterization of the First Wall in ITER and Future Fusion Devices. / Phillips, V.; Malaquias, A.; Hakola, Antti; Maddaluno, G.; Gasior, P.; Laan, M.; van der Meiden, H.; Rubel, M.; Almaviva, S.; Caneve, L.; Colao, F.; Gierse, N.; Huber, A.; Schweer, B.; Zlobinski, M.; Czarnecka, A.; Kubowska, M.; Petersson, P.

Programme, Abstracts, Presentations & Proceedings: 24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA. International Atomic Energy Agency IAEA, 2012. EX/P5-14.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Development of Laser Based Techniques for In-situ Characterization of the First Wall in ITER and Future Fusion Devices

AU - Phillips, V.

AU - Malaquias, A.

AU - Hakola, Antti

AU - Maddaluno, G.

AU - Gasior, P.

AU - Laan, M.

AU - van der Meiden, H.

AU - Rubel, M.

AU - Almaviva, S.

AU - Caneve, L.

AU - Colao, F.

AU - Gierse, N.

AU - Huber, A.

AU - Schweer, B.

AU - Zlobinski, M.

AU - Czarnecka, A.

AU - Kubowska, M.

AU - Petersson, P.

PY - 2012

Y1 - 2012

N2 - In situ methods to measure the fuel retention and to characterize the material deposition on the wall are highly important for ITER and future fusion devices. Laser-based methods are the most promising candidates (for non-invasive applications) and their feasibility is assessed in a cooperative undertaking in various European associations under EFDA coordination. The work concentrates on three different laser techniques in which the laser light is guided from outside the biological shield by a mirror system through a window onto special wall areas: i) laser induced desorption spectroscopy (LIDS) in which ms laser pulses thermally desorbs the retained fuel from a wall area of about 1cm2 and this fuel is spectroscopically detected in the edge of a running plasma, ii) laser induced ablation spectroscopy (LIAS) in which ns laser pulses ablates material from a small wall spot and the ablated material together with the incorporated fuel is detected in a similar way as in LIDS and iii) laser induced breakdown spectroscopy (LIBS) in which ns (or even ps ) laser pulses produce in front of the irradiated wall spot a plasma plume which (in proper conditions) emits line radiation being a fingerprint of the chemical composition of the ablated materials. The aims are to compare the pros and cons of the methods and propose an optimized solution for ITER. LIDS and LIAS have been developed in the TEXTOR tokamak to a prototype-like status for application in ITER. LIBS has been investigated in several EU laboratories in dedicated lab experiments with a focus on the particular conditions in ITER, including pilot experiments in the TEXTOR tokamak. To enable a clear and fair quantification of the methods, standard deposits of diamond like carbon (DLC) and mixed W/Al/C (with Al mimicing Be) with thicknesses of 2-3 μm deposited on rough and polished W substrates with a known D inventory were prepared using magnetron sputtering and vacuum arc deposition. They were used as reference samples in studies

AB - In situ methods to measure the fuel retention and to characterize the material deposition on the wall are highly important for ITER and future fusion devices. Laser-based methods are the most promising candidates (for non-invasive applications) and their feasibility is assessed in a cooperative undertaking in various European associations under EFDA coordination. The work concentrates on three different laser techniques in which the laser light is guided from outside the biological shield by a mirror system through a window onto special wall areas: i) laser induced desorption spectroscopy (LIDS) in which ms laser pulses thermally desorbs the retained fuel from a wall area of about 1cm2 and this fuel is spectroscopically detected in the edge of a running plasma, ii) laser induced ablation spectroscopy (LIAS) in which ns laser pulses ablates material from a small wall spot and the ablated material together with the incorporated fuel is detected in a similar way as in LIDS and iii) laser induced breakdown spectroscopy (LIBS) in which ns (or even ps ) laser pulses produce in front of the irradiated wall spot a plasma plume which (in proper conditions) emits line radiation being a fingerprint of the chemical composition of the ablated materials. The aims are to compare the pros and cons of the methods and propose an optimized solution for ITER. LIDS and LIAS have been developed in the TEXTOR tokamak to a prototype-like status for application in ITER. LIBS has been investigated in several EU laboratories in dedicated lab experiments with a focus on the particular conditions in ITER, including pilot experiments in the TEXTOR tokamak. To enable a clear and fair quantification of the methods, standard deposits of diamond like carbon (DLC) and mixed W/Al/C (with Al mimicing Be) with thicknesses of 2-3 μm deposited on rough and polished W substrates with a known D inventory were prepared using magnetron sputtering and vacuum arc deposition. They were used as reference samples in studies

M3 - Conference article in proceedings

BT - Programme, Abstracts, Presentations & Proceedings

PB - International Atomic Energy Agency IAEA

ER -

Phillips V, Malaquias A, Hakola A, Maddaluno G, Gasior P, Laan M et al. Development of Laser Based Techniques for In-situ Characterization of the First Wall in ITER and Future Fusion Devices. In Programme, Abstracts, Presentations & Proceedings: 24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA. International Atomic Energy Agency IAEA. 2012. EX/P5-14