Fast-ion energy resolution by one-step reaction gamma-ray spectrometry

The spectral broadening of γ-rays from fusion plasmas can be measured in high-resolution gamma-ray spectrometry (GRS). We derive weight functions that determine the observable velocity space and quantify the velocity-space sensitivity of one-step reaction high-resolution GRS measurements in magnetiz...

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Published in:Nuclear fusion 2016-04, Vol.56 (4), p.46009-46019
Main Authors: Salewski, M., Nocente, M., Gorini, G., Jacobsen, A.S., Kiptily, V.G., Korsholm, S.B., Leipold, F., Madsen, J., Moseev, D., Nielsen, S.K., Rasmussen, J., Stejner, M., Tardocchi, M.
Format: Article
Language:English
Subjects:
Energy resolution
fast-ion diagnostics
Gamma rays
gamma-ray spectrometry
Nuclear fusion
Plasmas
Reactions (nuclear)
Spectrometry
Spectroscopy
tokamak
Weight function
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cited_by cdi_FETCH-LOGICAL-c450t-b8f94d60078d722982212050eabd41b49d56ca17cae63f7451ccdcf0ef4bdc8d3
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container_end_page 46019
container_issue 4
container_start_page 46009
container_title Nuclear fusion
container_volume 56
creator Salewski, M.
Nocente, M.
Gorini, G.
Jacobsen, A.S.
Kiptily, V.G.
Korsholm, S.B.
Leipold, F.
Madsen, J.
Moseev, D.
Nielsen, S.K.
Rasmussen, J.
Stejner, M.
Tardocchi, M.
description The spectral broadening of γ-rays from fusion plasmas can be measured in high-resolution gamma-ray spectrometry (GRS). We derive weight functions that determine the observable velocity space and quantify the velocity-space sensitivity of one-step reaction high-resolution GRS measurements in magnetized fusion plasmas. The weight functions suggest that GRS resolves the energies of fast ions directly without the need for tomographic inversion for selected one-step reactions at moderate plasma temperatures. The D(p,γ)3He reaction allows the best direct fast-ion energy resolution. We illustrate our general formalism using reactions with and without intrinsic broadening of the γ-rays for the GRS diagnostic at JET.
doi_str_mv 10.1088/0029-5515/56/4/046009
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source Institute of Physics:Jisc Collections:IOP Publishing Read and Publish 2024-2025 (Reading List)
subjects Energy resolution
fast-ion diagnostics
Gamma rays
gamma-ray spectrometry
Nuclear fusion
Plasmas
Reactions (nuclear)
Spectrometry
Spectroscopy
tokamak
Weight function
title Fast-ion energy resolution by one-step reaction gamma-ray spectrometry
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