title: Suppression of tritium retention in remote areas of ITER by nonperturbative reactive gas injection.
abstract: A technique based on reactive gas injection in the afterglow region of the divertor plasma is proposed for the suppression of tritium-carbon codeposits in remote areas of ITER when operated with carbon-based divertor targets. Experiments in a divertor simulator plasma device indicate that a 4  nm/min deposition can be suppressed by addition of 1  Pa·m³ s⁻¹ ammonia flow at 10 cm from the plasma. These results bolster the concept of nonperturbative scavenger injection for tritium inventory control in carbon-based fusion plasma devices, thus paving the way for ITER operation in the active phase under a carbon-dominated, plasma facing component background.
authors.affiliation: As Euratom-Ciemat, Madrid, Spain. tabares@ciemat.es
authors.forename: F L
authors.initials: FL
authors.lastname: Tabarés
authors.forename: J A
authors.initials: JA
authors.lastname: Ferreira
authors.forename: A
authors.initials: A
authors.lastname: Ramos
authors.forename: G
authors.initials: G
authors.lastname: van Rooij
authors.forename: J
authors.initials: J
authors.lastname: Westerhout
authors.forename: R
authors.initials: R
authors.lastname: Al
authors.forename: J
authors.initials: J
authors.lastname: Rapp
authors.forename: A
authors.initials: A
authors.lastname: Drenik
authors.forename: M
authors.initials: M
authors.lastname: Mozetic