简介：SupersonicMolecularBeamInjection(SMBI)isanewfuellingmethodforTokamaksandhasrecentlybeenimprovedtoenhancethefluxofthebeamandtomakeasurveyoftheclustereffectwithinthebeam.Thereareaseriesofnewphenmnena,whichimplicatetheinteractionofthebeam(includingclusters)withthetoroidalplasmaofHiL-1MTokamak.TheHαsignalsfromtheedgeshowaregularvariationaroundthetorus.Aroundtheinjectionport,theedgeHαsignalsarepositiverectangularwave,whichisconsistentwiththatoftheinjectionbeampulses.Theedgeelectrontemperature,measuredwithmovableLangmuirprobes,decreasesbyanorderofmagnitudeandthedensityincreasesbyanorderofmagnitude.Hαemissionatthebeaminjectionport,measuredwithCCDcameraatanangleof13.4degreestotheSMBIline,showsmanyseparatepeakswithinthecontourplot.Thesepeaksmayshowthestrongemissionproducedbytheinteractionofthehydrogenclusterswiththeplasma.Hydrogenclustersmaybeproducedinthebeamaccordingtotheempiricalscaling(Hagena)lawofclusteringonset,heredisthenozzlediameterinμm,P0thestaguationpressureinmbar,T0thesourcetenperatureinK,andkisaconstantrelatedtothegasspecies.IfΓ*>100,clusterswillbeformed.InpresentexperimentΓ*isabout127.

简介：Electrondensity(Ne)inaglowdischargeplasmaforthesurfacealloyingtechniqueisdiagnosedbyopticalemissionspectrometry(OES).WithCH_4asthefeedinggas,NeisobtainedbycomparingtheHβspectrumaccordingtotheStarkbroadeningeffect.ItisnoticedthatNevarieswiththeworkingpressures(30Pato70Pa)andcathodevoltages(500Vto1000V),respectively.Duetoanabnormalglowdischarge,Neisbetween1.71×10~(15)/cm~3to6.64×10~(15)/cm~3andincreasesrapidlywithworkinggaspressuresandcathodevoltages.TheresultsshowthatOESisausefulmethodtomeasuretheplasmaparametersinasurfacealloyingglowdischargeplasma.

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