0000000000060172

AUTHOR

K. Brück

showing 3 related works from this author

A highly selective laser ion source for bunched, low emittance beam release

2004

A novel type of resonance ionization laser ion source (RILIS) is under development, which combines the advantages of laser ionization with those of a source-implemented ion trap. This laser ion source trap (LIST) system, based on a gas-filled linear radio-frequency quadrupole ion trap, decouples the evaporation and ionization process by introduction of a primary surface ion repeller. Apart from significantly enhancing the selectivity in radioactive ion beam production, optimum control on the temporal pulse structure and the emittance of the generated laser ion bunch is obtained. A variety of operational modes from quasi-dc to microseconds-bunched ion beams with variable repetition rate can …

PhysicsNuclear and High Energy PhysicsIon beamIon gunIon sourcelaw.inventionSecondary ion mass spectrometryIon beam depositionPhysics::Plasma PhysicsReflectronlawPhysics::Accelerator PhysicsPhysics::Atomic PhysicsIon trapAtomic physicsQuadrupole ion trapNuclear Physics A
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Three-step resonant photoionization spectroscopy of Ni and Ge: ionization potential and odd-parity Rydberg levels

2007

In preparation of a laser ion source, we have investigated multi-step laser ionization via Rydberg and autoionizing states for atomic Ni and Ge using a mass separator with an ion beam energy of 20 keV. For both elements resonant three-step excitation schemes suitable for modern Ti:sapphire laser systems were developed. Rydberg series in the range of principal quantum numbers 20 n 80 were localized, assigned and quantum numbers were allocated to the individual resonances. Ionization potentials (IP) were extracted from fits of the individual series and quantum defects of individual levels were analysed for confirmation of series assignment. For Ni the ionization potential could be extracted w…

PhysicsPhotoionizationCondensed Matter PhysicsQuantum numberAtomic and Molecular Physics and OpticsIon sourcesymbols.namesakeIonizationPrincipal quantum numberPhysics::Atomic and Molecular ClustersRydberg formulasymbolsPhysics::Atomic PhysicsIonization energyAtomic physicsSpectroscopyJournal of Physics B: Atomic, Molecular and Optical Physics
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Laser ion source tests at the HRIBF on stable Sn, Ge and Ni isotopes

2006

Abstract As one step in the ion source development for the Rare Isotope Accelerator, a hot-cavity laser ion source using an all-solid-state titanium–sapphire laser system has been tested at the Holifield Radioactive Ion Beam Facility. Resonance ionization of stable isotopes of Sn, Ge and Ni has been studied in a Ta hot cavity. Efficient three step resonant ionization schemes applying frequency tripling for the first excitation step and using auto-ionizing or atomic Rydberg states in the ionizing step have been identified for all three elements, resulting in laser ion beams of typically around 100 nA. By saturating most of the optical excitation steps involved, ionization efficiencies of 22%…

Nuclear and High Energy PhysicsIon beamChemistryStable isotope ratioAnalytical chemistryLaserIon sourceIonlaw.inventionIon beam depositionlawIonizationPhysics::Atomic and Molecular ClustersPhysics::Accelerator PhysicsPhysics::Atomic PhysicsAtomic physicsInstrumentationExcitationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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