Search results for "Cryocooler"

showing 3 items of 3 documents

A Mössbauer cryostat equipped with a Gifford McMahon cryocooler

1989

A new cryostat for Mossbauer spectroscopic measurements has been developed around a cryogenerator of the Gifford McMahon type operating with helium gas in a closed circuit. Both source and absorber can be cooled to about 30K and the unwanted vibrations caused by the helium compression/expansion cycle have been limited to approximately 0.05–0.06 mms−1.

CryostatNuclear and High Energy PhysicsHelium gasChemistryThermodynamicschemistry.chemical_elementControl equipmentCryogenicsCryocoolerCondensed Matter PhysicsAtomic and Molecular Physics and OpticsMössbauer spectroscopyPhysical and Theoretical ChemistryAtomic physicsClosed circuitHeliumHyperfine Interactions
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Design, construction and cooling system performance of a prototype cryogenic stopping cell for the Super-FRS at FAIR

2015

A cryogenic stopping cell for stopping energetic radioactive ions and extracting them as a low energy beam was developed. This first ever cryogenically operated stopping cell serves as prototype device for the Low-Energy Branch of the Super-FRS at FAIR. The cell has a stopping volume that is 1 m long and 25 cm in diameter. Ions are guided by a DC field along the length of the stopping cell and by a combined RF and DC fields provided by an RE carpet at the exit-hole side. The ultra-high purity of the stopping gas required for optimum ion survival is reached by cryogenic operation. The design considerations and construction of the cryogenic stopping cell, as well as some performance character…

Dc fieldNuclear and High Energy PhysicsSPACE-CHARGEPhysics::Instrumentation and DetectorsNuclear engineering7. Clean energy01 natural sciencesIonNuclear physicsSuper-FRSENERGYCryogenic stopping cell0103 physical sciencesWater coolingddc:530FACILITYradioactive ion beams010306 general physicsInstrumentationRADIOACTIVE IONSFinal versionPhysicsCATCHERSPECTROSCOPYta114010308 nuclear & particles physicsCYCLOTRON GAS STOPPERCryocoolerSpace chargeVolume (thermodynamics)13. Climate actionIon catcherRadioactive on beamsFLIGHT MASS-SPECTROMETRYPROJECTILE FRAGMENTSBeam (structure)ION GUIDE
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Recent progress on the superconducting ion source VENUS.

2012

The 28 GHz Ion Source VENUS (versatile ECR for nuclear science) is back in operation after the superconducting sextupole leads were repaired and a fourth cryocooler was added. VENUS serves as an R&D device to explore the limits of electron cyclotron resonance source performance at 28 GHz with its 10 kW gryotron and optimum magnetic fields and as an ion source to increase the capabilities of the 88-Inch Cyclotron both for nuclear physics research and applications. The development and testing of ovens and sputtering techniques cover a wide range of applications. Recent experiments on bismuth demonstrated stable operation at 300 eμA of Bi31+, which is in the intensity range of interest for hig…

plasma fysiikkaMaterials scienceta114biologybusiness.industryionilähteetCyclotronParticle acceleratorVenusCryocoolerplasmafysiikkabiology.organism_classificationElectron cyclotron resonanceFourier transform ion cyclotron resonanceIon sourcelaw.inventionOpticslawIon sourcesAtomic physicsbusinessInstrumentationIon cyclotron resonanceThe Review of scientific instruments
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