title: Recent improvements of the JET lithium beam diagnostic.
abstract: A 60 kV neutral lithium diagnostic beam probes the edge plasma of JET for the             measurement of electron density profiles. This paper describes recent enhancements of             the diagnostic setup, new procedures for calibration and protection measures for the             lithium ion gun during massive gas puffs for disruption mitigation. New light splitting             optics allow in parallel beam emission measurements with a new double entrance slit CCD             spectrometer (spectrally resolved) and a new interference filter avalanche photodiode             camera (fast density and fluctuation studies).
authors.affiliation: EURATOM∕CCFE Fusion Association, Culham Science Centre, OX14 3DB Abingdon, United Kingdom. Mathias.Brix@ccfe.ac.uk
authors.forename: M
authors.initials: M
authors.lastname: Brix
authors.forename: D
authors.initials: D
authors.lastname: Dodt
authors.forename: D
authors.initials: D
authors.lastname: Dunai
authors.forename: I
authors.initials: I
authors.lastname: Lupelli
authors.forename: S
authors.initials: S
authors.lastname: Marsen
authors.forename: T F
authors.initials: TF
authors.lastname: Melson
authors.forename: B
authors.initials: B
authors.lastname: Meszaros
authors.forename: P
authors.initials: P
authors.lastname: Morgan
authors.forename: G
authors.initials: G
authors.lastname: Petravich
authors.forename: D I
authors.initials: DI
authors.lastname: Refy
authors.forename: C
authors.initials: C
authors.lastname: Silva
authors.forename: M
authors.initials: M
authors.lastname: Stamp
authors.forename: T
authors.initials: T
authors.lastname: Szabolics
authors.forename: K-D
authors.initials: KD
authors.lastname: Zastrow
authors.forename: S
authors.initials: S
authors.lastname: Zoletnik