Search results for "molecular contamination"

showing 2 items of 2 documents

Separation of atomic and molecular ions by ion mobility with an RF carpet

2021

Gas-filled stopping cells are used at accelerator laboratories for the thermalization of high-energy radioactive ion beams. Common challenges of many stopping cells are a high molecular background of extracted ions and limitations of extraction efficiency due to space-charge effects. At the FRS Ion Catcher at GSI, a new technique for removal of ionized molecules prior to their extraction out of the stopping cell has been developed. This technique utilizes the RF carpet for the separation of atomic ions from molecular contaminant ions through their difference in ion mobility. Results from the successful implementation and test during an experiment with a 600~MeV/u $^{124}$Xe primary beam are…

low-energy RIBPhysics - Instrumentation and DetectorsOrders of magnitude (temperature)beam purificationFOS: Physical sciences010402 general chemistrynucl-ex01 natural sciences530Ionmenetelmätion mobilityIonizationMoleculeddc:530Physical and Theoretical ChemistryfysiikkaNuclear Experiment (nucl-ex)Nuclear ExperimentInstrumentationphysics.ins-detSpectroscopyIon transporterRange (particle radiation)ionitChemistry010401 analytical chemistryExtraction (chemistry)gas cellpuhdistusInstrumentation and Detectors (physics.ins-det)Condensed Matter Physics0104 chemical sciencesmolecular contaminationBeamlinespace chargeAtomic physicserottaminen (tekniikka)epäpuhtaudet
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Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method

2020

Nuclear instruments & methods in physics research / B 463, 324 - 326 (2020). doi:10.1016/j.nimb.2019.04.072

low-energy RIBNuclear and High Energy PhysicsMaterials scienceCollision-induced dissociationbeam purificationtutkimuslaitteet53001 natural sciencesDissociation (chemistry)RF-quadrupolelaw.inventionIonlawDipole magnet0103 physical sciencesddc:530Instrumentation010308 nuclear & particles physics010401 analytical chemistryContaminationSynchrotronIon source0104 chemical sciencesmolecular contaminationBeamlinecollision-induced dissociationPhysics::Accelerator PhysicsAtomic physicsydinfysiikkaNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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