title: Fuel ion ratio measurements in reactor relevant neutral beam heated fusion             plasmas.
abstract: In this paper, we present a method to derive n(t)/n(d) using the ratio of the thermonuclear neutron emission to the beam-target neutron emission. We apply it to neutron spectroscopy data from the magnetic proton recoil spectrometer taken during the deuterium tritium experiment at JET. n(t)/n(d)-values obtained using neutron spectroscopy are in qualitative agreement with those from other diagnostics measuring the isotopic composition of the exhaust in the divertor.
authors.affiliation: Department of Physics and Astronomy, Applied Nuclear Physics, Uppsala University, Sweden. carl.hellesen@physics.uu.se
authors.forename: C
authors.initials: C
authors.lastname: Hellesen
authors.forename: J
authors.initials: J
authors.lastname: Eriksson
authors.forename: S
authors.initials: S
authors.lastname: Conroy
authors.forename: G
authors.initials: G
authors.lastname: Ericsson
authors.forename: M
authors.initials: M
authors.lastname: Skiba
authors.forename: M
authors.initials: M
authors.lastname: Weiszflog