title: Ion temperature and toroidal rotation in JET's low torque plasmas.
abstract: This paper reports on the procedure developed as the best method to provide an accurate and reliable estimation of the ion temperature Tiand the toroidal velocity vϕfrom Charge-eXchange Recombination Spectroscopy (CXRS) data from intrinsic rotation experiments at the Joint European Torus with the carbon wall. The low impurity content observed in such plasmas, resulting in low active CXRS signal, alongside low Doppler shifts makes the determination of Tiand vϕparticularly difficult. The beam modulation method will be discussed along with the measures taken to increase photon statistics and minimise errors from the absolute calibration and magneto-hydro-dynamics effects that may impact the CXRS passive emission.
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: J
authors.initials: J
authors.lastname: Bernardo
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: M F F
authors.initials: MF
authors.lastname: Nave
authors.affiliation: Culham Centre for Fusion Energy, Culham Science Centre, Abingdon OX14 3DB, United Kingdom.
authors.forename: C
authors.initials: C
authors.lastname: Giroud
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: S
authors.initials: S
authors.lastname: Reyes Cortes
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: João P S
authors.initials: JP
authors.lastname: Bizarro
authors.affiliation: EUROfusion Consortium, JET, Culham Science Centre, Abingdon OX14 3DB, United KingdomInstituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, PortugalCulham Centre for Fusion Energy, Culham Science Centre, Abingdon OX14 3DB, United Kingdom.