Search results for "Extraction time"

showing 3 items of 3 documents

Rate capability of a cryogenic stopping cell for uranium projectile fragments produced at 1000 MeV/u

2016

At the Low-Energy Branch (LEB) of the Super-FRS at FAIR, projectile and fission fragments will be produced at relativistic energies, separated in-flight, energy-bunched, slowed down and thermalized in a cryogenic stopping cell (CSC) filled with ultra-pure He gas. The fragments are extracted from the stopping cell using a combination of DC and RF electric fields and gas flow. A prototype CSC for the LEB has been developed and successfully commissioned at the FRS Ion Catcher at GSI. Ionization of He buffer gas atoms during the stopping of energetic ions creates a region of high space charge in the stopping cell. The space charge decreases the extraction efficiency of stopping cells since the …

Nuclear and High Energy PhysicsEXTRACTIONFissionBuffer gasION-CATCHER01 natural sciencesSpace chargeIonHEAVY-IONSNuclear physicsMOBILITIESElectric fieldIonization0103 physical sciencesRate capabilityddc:530SPECTROMETER010306 general physicsNuclear ExperimentInstrumentationSUPER-FRSHIGH-PRECISION EXPERIMENTSta114010308 nuclear & particles physicsChemistryProjectileBEAMSPERFORMANCEGAS CELLSpace chargeExtraction efficiencyExtraction timeCryogenic gas-filled stopping cellAtomic physicsBeam (structure)Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
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The FRS Ion Catcher

2013

At the FRS Ion Catcher at GSI, projectile and fission fragments are produced at relativistic energies, separated in-flight, range-focused, slowed down and thermalized in a cryogenic stopping cell. A multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) is used to perform direct mass measurements and to provide an isobarically clean beam for further experiments, such as mass-selected decay spectroscopy. A versatile RF quadrupole transport and diagnostics unit guides the ions from the stopping cell to the MR-TOF-MS, provides differential pumping, ion identification and includes reference ion sources. The FRS Ion Catcher serves as a test facility for the Low-Energy Branch of the Sup…

Nuclear and High Energy PhysicsPhysics::Instrumentation and DetectorsFissionMass spectrometry01 natural sciencesIonHEAVY-IONSNuclear physicsENERGYGSI0103 physical sciencesddc:530NuclideNuclear Experiment010306 general physicsInstrumentationSUPER-FRSDirect mass measurementta114010308 nuclear & particles physicsChemistryProjectileMultiple-reflection time-of-flight mass spectrometerExtraction timeTIMECryogenic gas-filled stopping cellQuadrupoleISOBAR-SEPARATIONFacility for Antiproton and Ion ResearchAtomic physicsProjectile fragmentationBeam (structure)Exotic nucleiSYSTEMNuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
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The performance of the cryogenic buffer-gas stopping cell of SHIPTRAP

2018

Direct high-precision mass spectrometry of the heaviest elements with SHIPTRAP, at GSI in Darmstadt, Germany, requires high efficiency to deal with the low production rates of such exotic nuclides. A second-generation gas stopping cell, operating at cryogenic temperatures, was developed and recently integrated into the relocated system to boost the overall efficiency. Offline measurements using 223Ra and 225Ac recoil-ion sources placed inside the gas volume were performed to characterize the gas stopping cell with respect to purity and extraction efficiency. In addition, a first online test using the fusion-evaporation residue 254No was performed, resulting in a combined stopping and extrac…

Speichertechnik - Abteilung BlaumNuclear and High Energy PhysicsMaterials scienceDIRECT MASS MEASUREMENTSProtonBuffer gaschemistry.chemical_elementPenning trapsMass spectrometry7. Clean energy01 natural sciencesFusion-evaporation reaction productsNuclear physicsIonization0103 physical sciencesCalibrationStopping and extraction efficiencyNuclide010306 general physicsInstrumentationCALIBRATION[PHYS]Physics [physics]nobeliumSPECTROSCOPYMass spectrometry010308 nuclear & particles physicsTransfermium elementsCryogenic gas stopping cellExtraction timeHEAVIEST ELEMENTSchemistryIONIZATIONNobeliumOrder of magnitude
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