title: Observations of the frequency tuning effect in the 14 GHz CAPRICE ion source.
abstract: A set of measurements with the CAPRICE ion source at the GSI test bench has been carried out to investigate its behavior in terms of intensity and shape of the extracted beam when the microwaves generating the plasma sweep in a narrow range of frequency (+/-40 MHz) around the klystron center frequency (14.5 GHz). Remarkable variations have been observed depending on the source and the beamline operating parameters, confirming that a frequency dependent electromagnetic distribution is preserved even in the presence of plasma inside the source. Moreover, these observations confirm that the frequency tuning is a powerful method to optimize the electron cyclotron resonance ion source performances. A description of the experimental setup and of the obtained results is given in the following.
authors.affiliation: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Via S. Sofia 62, 95123 Catania, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Celona
authors.forename: G
authors.initials: G
authors.lastname: Ciavola
authors.forename: F
authors.initials: F
authors.lastname: Consoli
authors.forename: S
authors.initials: S
authors.lastname: Gammino
authors.forename: F
authors.initials: F
authors.lastname: Maimone
authors.forename: D
authors.initials: D
authors.lastname: Mascali
authors.forename: P
authors.initials: P
authors.lastname: Spädtke
authors.forename: K
authors.initials: K
authors.lastname: Tinschert
authors.forename: R
authors.initials: R
authors.lastname: Lang
authors.forename: J
authors.initials: J
authors.lastname: Mäder
authors.forename: J
authors.initials: J
authors.lastname: Robbach
authors.forename: S
authors.initials: S
authors.lastname: Barbarino
authors.forename: R S
authors.initials: RS
authors.lastname: Catalano