6533b83afe1ef96bd12a6fd3
RESEARCH PRODUCT
Effect of double frequency heating on the lead afterglow beam currents of an electron cyclotron resonance ion source
D. KüchlerOlli TarvainenGiulia BellodiFredrik WenanderVille Toivanensubject
Nuclear and High Energy PhysicsMaterials scienceCERN LabPhysics and Astronomy (miscellaneous)Ion beam[PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph]Cyclotron resonancecyclotron: resonanceheating01 natural sciencesElectron cyclotron resonance010305 fluids & plasmasmicrowaves: frequencyplasma production0103 physical scienceslead: ionlcsh:Nuclear and particle physics. Atomic energy. Radioactivityparticle source010302 applied physicsta114beam: stabilityResonanceSurfaces and InterfacesAccelerators and Storage RingsIon sourceheavy ionAfterglowlcsh:QC770-798Atomic physicsMicrowaveIon cyclotron resonanceperformancedescription
International audience; The effect of double frequency heating on the performance of the CERN GTS-LHC 14.5 GHz ElectronCyclotron Resonance (ECR) ion source in afterglow mode is reported. The source of the secondary microwave frequency was operated both in pulsed and continuous wave (CW) modes within the range of 12–18 GHz. The results demonstrate that the addition of the secondary frequency can significantly impact the extracted beam currents and the temporal stability of the beam during the afterglow discharge. For example, up to a factor of 2.6 increase was achieved for 208Pb35+ and a factor of 3.1 for 208Pb37+ compared to single frequency afterglow currents. It is shown that these effects are dependent on the choice of the secondary frequency with respect to the primary one and on the temporal synchronization between the two microwave sources. Overall, the results provide new insight into the afterglow discharge supporting the prevailing understanding of the physical processes behind the phenomenon.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 | Physical Review Accelerators and Beams |