Measuring gross beryllium erosion with visible cameras in JET

E. de la Cal; U. Losada; I. Balboa; D. Borodin; I. Borodkina; S. Brezinsek; P. Carvalho; T. Dittmar; D. Douai; A. Huber; V. Huber; J. Karhunen; A. Manzanares; E. Pawelec; J. Romazanov; A. Shaw; S. Silburn; E. R. Solano

doi:10.1088/1741-4326/ac7c04

Measuring gross beryllium erosion with visible cameras in JET

E. de la Cal, U. Losada, I. Balboa, D. Borodin, I. Borodkina, S. Brezinsek, P. Carvalho, T. Dittmar, D. Douai, A. Huber, V. Huber, J. Karhunen, A. Manzanares, E. Pawelec, J. Romazanov, A. Shaw, S. Silburn, E. R. Solano

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4 Scopus citations

Abstract

Two visible cameras with the same wide-angle view have been used to study the gross beryllium (Be) erosion in JET. An absolutely calibrated spectroscopy system employed in the past for the same object was used to quantitatively infer the camera photon fluxes and also to validate the results. To extract the effective sputtering yield, a simplified method is applied from the quotient of the measured radiances of the D_α and the Be II line at 527 nm. The obtained results are in reasonably good agreement with those already published. The main benefit of using cameras is that the global view of the plasma-wall interaction surfaces of the whole vessel is monitored, and the different sources and their wetted areas can be identified and quantified. In addition, the measurement of the particle flux distributions can be used for the validation of three-dimensional erosion-transport codes.

Original language	English
Article number	126001
Journal	Nuclear Fusion
Volume	62
Issue number	12
DOIs	https://doi.org/10.1088/1741-4326/ac7c04
State	Published - Dec 2022
Externally published	Yes

Bibliographical note

Publisher Copyright:
© EURATOM 2022.

Funding

This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No. 101052200—EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them.

Funders	Funder number
European Commission	101052200—EUROfusion

Keywords

ITER
JET
beryllium
cameras
erosion
spectroscopy
sputtering

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10.1088/1741-4326/ac7c04

Cite this

de la Cal, E., Losada, U., Balboa, I., Borodin, D., Borodkina, I., Brezinsek, S., Carvalho, P., Dittmar, T., Douai, D., Huber, A., Huber, V., Karhunen, J., Manzanares, A., Pawelec, E., Romazanov, J., Shaw, A., Silburn, S., & Solano, E. R. (2022). Measuring gross beryllium erosion with visible cameras in JET. Nuclear Fusion, 62(12), Article 126001. https://doi.org/10.1088/1741-4326/ac7c04

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abstract = "Two visible cameras with the same wide-angle view have been used to study the gross beryllium (Be) erosion in JET. An absolutely calibrated spectroscopy system employed in the past for the same object was used to quantitatively infer the camera photon fluxes and also to validate the results. To extract the effective sputtering yield, a simplified method is applied from the quotient of the measured radiances of the Dα and the Be II line at 527 nm. The obtained results are in reasonably good agreement with those already published. The main benefit of using cameras is that the global view of the plasma-wall interaction surfaces of the whole vessel is monitored, and the different sources and their wetted areas can be identified and quantified. In addition, the measurement of the particle flux distributions can be used for the validation of three-dimensional erosion-transport codes.",

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de la Cal, E, Losada, U, Balboa, I, Borodin, D, Borodkina, I, Brezinsek, S, Carvalho, P, Dittmar, T, Douai, D, Huber, A, Huber, V, Karhunen, J, Manzanares, A, Pawelec, E, Romazanov, J, Shaw, A, Silburn, S & Solano, ER 2022, 'Measuring gross beryllium erosion with visible cameras in JET', Nuclear Fusion, vol. 62, no. 12, 126001. https://doi.org/10.1088/1741-4326/ac7c04

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AU - de la Cal, E.

AU - Losada, U.

AU - Balboa, I.

AU - Borodin, D.

AU - Borodkina, I.

AU - Brezinsek, S.

AU - Carvalho, P.

AU - Dittmar, T.

AU - Douai, D.

AU - Huber, A.

AU - Huber, V.

AU - Karhunen, J.

AU - Manzanares, A.

AU - Pawelec, E.

AU - Romazanov, J.

AU - Shaw, A.

AU - Silburn, S.

AU - Solano, E. R.

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Measuring gross beryllium erosion with visible cameras in JET

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