Monitoring the leakage of 3.0 and 14.7 MeV protons from a fusion plasma

Raquel González De Orduña; Mikael Hult; Georges Bonheure; Matthias Laubenstein; Gerd Marissens; Peter Vermaercke; J. S. Elisabeth Wieslander; Andrea Murari

doi:10.1016/j.nima.2010.12.151

Monitoring the leakage of 3.0 and 14.7 MeV protons from a fusion plasma

Raquel González De Orduña, Mikael Hult, Georges Bonheure, Matthias Laubenstein, Gerd Marissens, Peter Vermaercke, J. S. Elisabeth Wieslander, Andrea Murari

Laboratory for Plasma Physics

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Abstract

An experiment to study, separately, the leakage of protons of 3.0 and 14.7 MeV in the JET Tokamak, is presented. The activity of the activation products induced by the plasma in different samples that were placed inside the Tokamak was measured using ultra low-level gamma-ray spectrometry (ULGS). Stacking of some of the samples during activation allowed differentiating between the protons of 3.0 and 14.7 MeV that originated in two different reactions in the plasma. For the B₄C sample the ratio of the 3.0 and 14.7 MeV proton flux could be determined as 0.17(10) assuming normal incidence and 0.31(16) assuming 45° incidence. For LiF the result obtained was that, within the uncertainty, there was no contribution from the 3.0 MeV protons.

Original language	English
Pages (from-to)	89-100
Number of pages	12
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	632
Issue number	1
DOIs	https://doi.org/10.1016/j.nima.2010.12.151
Publication status	Published - 11 Mar 2011

Keywords

Activation
Proton leakage
Thermonuclear fusion
Ultra low-level gamma-ray spectrometry
Underground laboratory

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10.1016/j.nima.2010.12.151

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González De Orduña, R., Hult, M., Bonheure, G., Laubenstein, M., Marissens, G., Vermaercke, P., Elisabeth Wieslander, J. S., & Murari, A. (2011). Monitoring the leakage of 3.0 and 14.7 MeV protons from a fusion plasma. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 632(1), 89-100. https://doi.org/10.1016/j.nima.2010.12.151

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abstract = "An experiment to study, separately, the leakage of protons of 3.0 and 14.7 MeV in the JET Tokamak, is presented. The activity of the activation products induced by the plasma in different samples that were placed inside the Tokamak was measured using ultra low-level gamma-ray spectrometry (ULGS). Stacking of some of the samples during activation allowed differentiating between the protons of 3.0 and 14.7 MeV that originated in two different reactions in the plasma. For the B4C sample the ratio of the 3.0 and 14.7 MeV proton flux could be determined as 0.17(10) assuming normal incidence and 0.31(16) assuming 45° incidence. For LiF the result obtained was that, within the uncertainty, there was no contribution from the 3.0 MeV protons.",

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author = "{Gonz{\'a}lez De Ordu{\~n}a}, Raquel and Mikael Hult and Georges Bonheure and Matthias Laubenstein and Gerd Marissens and Peter Vermaercke and {Elisabeth Wieslander}, {J. S.} and Andrea Murari",

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González De Orduña, R, Hult, M, Bonheure, G, Laubenstein, M, Marissens, G, Vermaercke, P, Elisabeth Wieslander, JS & Murari, A 2011, 'Monitoring the leakage of 3.0 and 14.7 MeV protons from a fusion plasma', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 632, no. 1, pp. 89-100. https://doi.org/10.1016/j.nima.2010.12.151

Monitoring the leakage of 3.0 and 14.7 MeV protons from a fusion plasma. / González De Orduña, Raquel; Hult, Mikael; Bonheure, Georges et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 632, No. 1, 11.03.2011, p. 89-100.

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

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T1 - Monitoring the leakage of 3.0 and 14.7 MeV protons from a fusion plasma

AU - González De Orduña, Raquel

AU - Hult, Mikael

AU - Bonheure, Georges

AU - Laubenstein, Matthias

AU - Marissens, Gerd

AU - Vermaercke, Peter

AU - Elisabeth Wieslander, J. S.

AU - Murari, Andrea

PY - 2011/3/11

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N2 - An experiment to study, separately, the leakage of protons of 3.0 and 14.7 MeV in the JET Tokamak, is presented. The activity of the activation products induced by the plasma in different samples that were placed inside the Tokamak was measured using ultra low-level gamma-ray spectrometry (ULGS). Stacking of some of the samples during activation allowed differentiating between the protons of 3.0 and 14.7 MeV that originated in two different reactions in the plasma. For the B4C sample the ratio of the 3.0 and 14.7 MeV proton flux could be determined as 0.17(10) assuming normal incidence and 0.31(16) assuming 45° incidence. For LiF the result obtained was that, within the uncertainty, there was no contribution from the 3.0 MeV protons.

AB - An experiment to study, separately, the leakage of protons of 3.0 and 14.7 MeV in the JET Tokamak, is presented. The activity of the activation products induced by the plasma in different samples that were placed inside the Tokamak was measured using ultra low-level gamma-ray spectrometry (ULGS). Stacking of some of the samples during activation allowed differentiating between the protons of 3.0 and 14.7 MeV that originated in two different reactions in the plasma. For the B4C sample the ratio of the 3.0 and 14.7 MeV proton flux could be determined as 0.17(10) assuming normal incidence and 0.31(16) assuming 45° incidence. For LiF the result obtained was that, within the uncertainty, there was no contribution from the 3.0 MeV protons.

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KW - Proton leakage

KW - Thermonuclear fusion

KW - Ultra low-level gamma-ray spectrometry

KW - Underground laboratory

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IS - 1

ER -

Monitoring the leakage of 3.0 and 14.7 MeV protons from a fusion plasma

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