简介：Anatmospheric-pressureargonplasmajetwithscrewring-ringelectrodesinsurfacedielectricbarrierdischargeisgeneratedbyasinusoidalexcitationvoltageat8kHz.Thedischargecharacteristics,suchasrotationalandvibrationaltemperatureofnitrogen,electronicexcitationtemperature,oxygenatomicdensity,nitrogenmoleculardensity,andaverageelectrondensity,areestimated.Itisfoundthattherotationaltemperatureofnitrogenisintherangeof352～392KbycomparingthesimulatedspectrumwiththemeasuredspectrumattheC3Πu→B3Πg(△ν=2)bandtransition,theelectronicexcitationtemperatureisfoundtobeintherangeof3127～3230KbyusingtheBoltzmannplotmethod,theoxygenatomicandnitrogenmoleculardensityareoftheorderofmagnitudeof1016cm-3bytheactinometrymethod,andtheaverageelectrondensityisoftheorderofmagnitudeof1012cm-3bytheenergybalanceequation.Besides,theeffectivepower,conduction,anddisplacementcurrentaremeasuredduringthedischarge.

简介：ApoolcooledexperimentalmagnetbasedonthecopperstabilizedNbTisuperconductingwirewasdesigned,fabricatedandtested,inordertoevaluatetheengineeringdesignofthedipolesuperconductingmagnetforthecollectorring(CR)ofthefacilityforantiprotonandionresearch(FAIR)project.Inthispaper,theexperimentalsetupincludingquenchprotectionsystemwaspresented.Performanceoftheliquidheliumpoolcooledtestwasintroduced.Alloftheresultsindicateboththeperformanceofconductorandtheexperimentalsuperconductingmagnetunderlowtemperatureisstable,whichsuggeststheengineeringdesignarefeasiblefortheformalmagnetinCRoftheFAIRproject.