title: Energetic ion loss detector on the Alcator C-Mod tokamak.
abstract: A scintillator-based energetic ion loss detector has been successfully commissioned on the Alcator C-Mod tokamak. This probe is located just below the outer midplane, where it captures ions of energies up to 2 MeV resulting from ion cyclotron resonance heating. After passing through a collimating aperture, ions impact different regions of the scintillator according to their gyroradius (energy) and pitch angle. The probe geometry and installation location are determined based on modeling of expected lost ions. The resulting probe is compact and resembles a standard plasma facing tile. Four separate fiber optic cables view different regions of the scintillator to provide phase space resolution. Evolving loss levels are measured during ion cyclotron resonance heating, including variation dependent upon individual antennae.
authors.affiliation: Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831, USA. pacedc@fusion.gat.com
authors.forename: D C
authors.initials: DC
authors.lastname: Pace
authors.forename: R S
authors.initials: RS
authors.lastname: Granetz
authors.forename: R
authors.initials: R
authors.lastname: Vieira
authors.forename: A
authors.initials: A
authors.lastname: Bader
authors.forename: J
authors.initials: J
authors.lastname: Bosco
authors.forename: D S
authors.initials: DS
authors.lastname: Darrow
authors.forename: C
authors.initials: C
authors.lastname: Fiore
authors.forename: J
authors.initials: J
authors.lastname: Irby
authors.forename: R R
authors.initials: RR
authors.lastname: Parker
authors.forename: W
authors.initials: W
authors.lastname: Parkin
authors.forename: M L
authors.initials: ML
authors.lastname: Reinke
authors.forename: J L
authors.initials: JL
authors.lastname: Terry
authors.forename: S M
authors.initials: SM
authors.lastname: Wolfe
authors.forename: S J
authors.initials: SJ
authors.lastname: Wukitch
authors.forename: S J
authors.initials: SJ
authors.lastname: Zweben