title: Implementation of the new multichannel X-mode edge density profile reflectometer for the ICRF antenna on ASDEX Upgrade.
abstract: A new multichannel frequency modulated continuous-wave reflectometry diagnostic has been successfully installed and commissioned on ASDEX Upgrade to measure the plasma edge electron density profile evolution in front of the Ion Cyclotron Range of Frequencies (ICRF) antenna. The design of the new three-strap ICRF antenna integrates ten pairs (sending and receiving) of microwave reflectometry antennas. The multichannel reflectometer can use three of these to measure the edge electron density profiles up to 2 × 1019m-3, at different poloidal locations, allowing the direct study of the local plasma layers in front of the ICRF antenna. ICRF power coupling, operational effects, and poloidal variations of the plasma density profile can be consistently studied for the first time. In this work the diagnostic hardware architecture is described and the obtained density profile measurements were used to track outer radial plasma position and plasma shape.
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: D E
authors.initials: DE
authors.lastname: Aguiam
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: A
authors.initials: A
authors.lastname: Silva
authors.affiliation: Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany.
authors.forename: V
authors.initials: V
authors.lastname: Bobkov
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: P J
authors.initials: PJ
authors.lastname: Carvalho
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: P F
authors.initials: PF
authors.lastname: Carvalho
authors.affiliation: Consorzio RFX (CNR, ENEA, INFN, Universitá di Padova, Acciaierie Venete SpA), Corso Stati Uniti 4, 35127 Padova, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Cavazzana
authors.affiliation: Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany.
authors.forename: G D
authors.initials: GD
authors.lastname: Conway
authors.affiliation: ENEA, Dipartimento FSN, C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy.
authors.forename: O
authors.initials: O
authors.lastname: D'Arcangelo
authors.affiliation: Universitá degli Studi Milano Bicocca, Dipartimento di Fisica, Piazza della Scienza 3, 20126 Milano, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Fattorini
authors.affiliation: Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Faugel
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: A
authors.initials: A
authors.lastname: Fernandes
authors.affiliation: Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Fünfgelder
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: B
authors.initials: B
authors.lastname: Gonçalves
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: L
authors.initials: L
authors.lastname: Guimarais
authors.affiliation: Consorzio RFX (CNR, ENEA, INFN, Universitá di Padova, Acciaierie Venete SpA), Corso Stati Uniti 4, 35127 Padova, Italy.
authors.forename: G
authors.initials: G
authors.lastname: De Masi
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: L
authors.initials: L
authors.lastname: Meneses
authors.affiliation: Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany.
authors.forename: J M
authors.initials: JM
authors.lastname: Noterdaeme
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: R C
authors.initials: RC
authors.lastname: Pereira
authors.affiliation: ENEA, Dipartimento FSN, C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Rocchi
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
authors.forename: J M
authors.initials: JM
authors.lastname: Santos
authors.affiliation: ENEA, Dipartimento FSN, C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy.
authors.forename: A A
authors.initials: AA
authors.lastname: Tuccillo
authors.affiliation: ENEA, Dipartimento FSN, C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy.
authors.forename: O
authors.initials: O
authors.lastname: Tudisco
authors.affiliation: Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany.