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The line of sight is equipped with a LiH attenuator, which reduces the background due to 14\u00a0MeV neutron interactions with the crystal by more than two orders of magnitude and enables the observation of gamma-ray emission from confined \u03b1 particles in JET deuterium\u2013tritium plasmas. Thanks to its tangential line of sight, the detector can distinguish co- and counter-passing ions. The performance of the instrument is demonstrated through the results of recent JET fast ion experiments in deuterium plasmas.<\/jats:p>","DOI":"10.1063\/5.0043806","type":"journal-article","created":{"date-parts":[[2021,4,13]],"date-time":"2021-04-13T13:58:50Z","timestamp":1618322330000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":21,"title":["A new tangential gamma-ray spectrometer for fast ion measurements in deuterium and deuterium\u2013tritium plasmas of the Joint European Torus"],"prefix":"10.1063","volume":"92","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0170-5275","authenticated-orcid":false,"given":"M.","family":"Nocente","sequence":"first","affiliation":[{"name":"Department of Physics \u201cG. 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