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Role of neutron attenuators for gamma-ray measurements in deuterium-tritium magnetic confinement plasmas

Rigamonti D.; Dal Molin A.; Gorini G.; Marcer G.; Nocente M.; Rebai M.; Craciunescu T.; Ghani Z.; Kiptily V.; Maslov M.; Shevelev A.; Zohar A.; Tardocchi M.

The Joint European Torus (JET) is the only tokamak in the world able to operate in Deuterium-Tritium (DT) plasmas. A successful DT experimental campaign, the DTE2, has recently been carried out, providing unique opportunities for studying both physics and technological aspects. In particular, it allowed us to investigate and benchmark the solutions adopted to attenuate the significant 14 MeV neutron flux, needed to enable high-resolution gamma-ray spectroscopy measurements on a tokamak. While in inertial confinement experiments, gamma-rays and neutrons are discriminated through time-of-flight techniques; in magnetic confinement experiments, the neutron attenuators are a key element to allow gamma-ray measurements in order to reestablish the 1 × 105 to 1 background to signal ratio. In this paper, the role of the reference neutron attenuators at JET, based on LiH, has been analyzed and described.

ID 472945
DOI 10.1063/5.0101783
PRODUCT TYPE Journal Article
LAST UPDATE 2023-01-12T09:25:34Z
TITLE Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium