简介：

简介：

简介：Implementationofaweb-basedlogbooksystemonEASTisintroduced,whichcanstorethecommentsfortheexperimentsintoadatabaseandaccessthedocumentsviavariouswebbrowsers.Thethree-tiersoftwarearchitectureandasynchronousaccesstechnologyareadoptedtoimprovethesystemeffectively.Authorizeduserscanviewtheinformationofreal-timedischarge,commentsfromothersandsignalplots;add,delete,orrevisetheirowncomments;searchsignaldataorcommentsundercomplicatedsearchconditions;andcollectrelevantinformationandoutputittoanexcelfile.Thewebpagescanbeautomaticallyupdatedafteranewdischargeiscompletedandwithoutrefreshment.

简介：InordertoobtaincreditabledataanapplicablemethodtooptimizeparametersoftheLangmuirprobesandcircuitsinastationarylaboratorydeviceisinvestigatedandanexperimentalcriterionoftheprobedimensionisdeveloped.ToobtaintheelectrontemperatureanddensitytheElectronEnergyDistributionFunction(EEDF)approachwithlesscomputingtimeandmoreaccurateresultsisapplied,insteadoftheconventionalslopeapproach.Moreovertheinfluenceofthevesselwallmaterialsontheplasmadensityisdiscussedbriefly,indicatingthatthedielectricwallishelpfultoenhancingtheelectrondensity.

简介：AdesignofthemainAC/DCconvertersystemforITERisdescribedandthecon-figurationofthemainAC/DCconvertersispresented.Toreducethereactivepowerabsorbedfromtheconverterunits,themainAC/DCconvertersaredesignedtobeseries-connectedandworkinasequentialmode.Thestructureoftheregulatoroftheconvertersystemisdescribed.AsimulationmodelwasbuiltupforthePSCAD/EMTDCcode,andthedesignwasvalidatedaccordingly.Harmonicanalysisandreactivepowercalculationoftheconvertersunitsarepresented.Theresultsrevealtheadvantageofsequentialcontrolinreducingreactivepowerandharmonics.

简介：

简介：

简介：

简介：

简介：Anew140GHz/2MW/3selectroncyclotronresonanceheating(ECRH)systemcomposedoftwounitsisnowbeingconstructedonHL-2A.Asapartofthesystem,twotransmissionlinesmarkedNo.7&8playtheroleofcarryingmicrowavepowerfromtwogyrotronstothetokamakport.Basedontheoversizedcircularcorrugatedwaveguidetechnology,anevacuatedtransmissionsystemwithhighpowercapabilityandhightransmissionefficiencyisdesigned.Detailsarepresentedforthedesignofthecorrugatedwaveguide,thelayoutoftheproposedlinesandthevacuumpumpingsystem.Thenmodeconversionlossesduetocoupling,misalignment,bendsandgapsarediscussedtoserveasareferenceforanalyzingthetransmissionefficiencyandalignment.Finally,adual-modespropagationcaseconsistingoftheHEnandLPnevenmodesisdiscussed

简介：Inlowerhybridcurrentdrive(LHCD)experimentsinHT-7,LHwavecoupledtotheplasmafrom12klystronsislaunchedbyaphasedmulti-junctiongrill.Highpowermicrowavereflectionorarc,whichthreatenstheklystrons,thewave-guideceramicwindowsandthevacuumofthetokamak,occursometimesduringtheexperiments.Forthesakeofsafety,ahighpowermicrowavetestsystemtoperformsimulationswasdeveloped.Inthetestexperiments,theklystronandwindowcanbewellprotectedwithanoptimizedmicrowavemonitorandaPINswitch.ThelayoutofthetestsystemandthesimulatedexperimentsforHT-7aredescribedinthispaper.

简介：Ioncyclotronrangeoffrequency(ICRF)heatinghasbeenusedintokamaksasoneofthemostsuccessfulauxiliaryheatingtoolsandhasbeenadoptedintheEAST.However,theantennaloadwillfluctuatewiththechangeofplasmaparametersintheICRFheatingprocess.ToensurethesteadyoperationoftheICRFheatingsystemintheEAST,fastferritetuner(FFT)hasbeencarriedouttoachievereal-timeimpedancematching.FortherequirementsoftheFFTimpedancematchingsystem,themagnetsystemoftheferritetuner(FT)wasdesignedbynumericalsimulationsandexperimentalanalysis,wherethebiasingmagneticcircuitandalternatingmagneticcircuitwerethekeyresearchedpartsoftheferritemagnet.TheintegraldesigngoaloftheFTmagneticcircuitisthatDCbiasmagneticfieldis2000Gsandalternatingmagneticfieldis±400Gs.IntheFTT,E-typemagneticcircuitwasadopted.FerritematerialisNdFeBwithathicknessof30mmbysettingtheworkingpointofNdFeB,andtheampereturnofexcitationcoilis25throughthetheoreticalcalculationandsimulationanalysis.Thecoilinductancetogeneratealternatingmagneticfieldisabout7mH.Eddy-currenteffecthasbeenanalyzed,whilethemagneticfielddistributionhasbeenmeasuredbyaHallprobeinthemediumplaneofthebiasingmagnet.Finally,thetestresultsshowthegoodperformanceofthebiasingmagnetsatisfyingthedesignandoperatingrequirementsoftheFFT.

简介：Synchronousoutputofonebeamline’stwomegawatthotcathodebucketionsourcesisrequiredwhenNeutralBeamInjector(NBI)worksontheExperimentalAdvancedSuperconductingTokamak(EAST).NeutralBeamInjectorControlSystem(NBICS)realizessynchronousoutputandasynchronousoutputoftwoionsourceswithnetworkcommunicationandhardwaretriggers.Andthesynchronoustimecanbesetbyoperator.Insynchronousmode,twomegawatthotcathodebucketionsourcescanproduceneutralbeamsatanyrelativetimewithhigherenergythantwosources’asynchronousoutput.Twomegawatthotcathodebucketionsources’synchronousoutputmakesanimportantcontributiontoNBIsystemof4-8MWwith10-100spulselengthandprovidesmoreandbetterparametersforEASTphysicalexperiments.

简介：Theoreticalcalculationandexperimentalresultsforapolarizerwithsinusoidalgroovesusedintheelectroncyclotronresonanceheating(ECRH)systemoftheHL-2Atokamakarepresented.Thecalculationisbasedonanintegralmethoddevelopedinthevectortheoryofdiffractiongratings,andthepolarizationcharacteristicsobtainedwithalow-powertestareingoodagreementwiththenumericalcalculatedresults.WiththepolarizerassembledinamiterbendintheECRHtransmissionline,pureordinarymode(O-mode)andextraordinarymode(X-mode)polarizedwavesarealsoexpectedinthehigh-powerexperiment,dependingonthepolarizerrotationangleandthetoroidalinjectionangleoftheelectroncyclotron(EC)wavebeam.Second-harmonicX-modeexperimentsweresuccessfullyexploredinHL-2A.Experimentalresultrevealedthattheelectrontemperatureincreasedfrom0.8keV(Ohmicheatingphase)to1.5keV(secondX-modeheatingphase).

简介：Itwasrecentlysuggestedthattheperiodicandfractalprecipitaionofcalciumsaltsandproteinsincholesterolgallstonesiscloselyrelatedtotheprocessofstoneformation.Thepresentstudyistomimictheprocessofgallstonegrowthinvitro.Wedemonstrateforthefirsttimethatathree-dimensionalstructureofperiodicrings(Liesegangring)and/orfractalpatternscanbeproducedbymetalionanddeoxycholateprecipitaitonwhicharesimilartogallstones.Precipitationinaperiodicpatternoccursmoreoftenthaninafractalstructure,UsingX-raydiffraction.polarizedlightmicroscope,Fouriertransform-infrared(FT-IR),andextendedX-rayabsorptionfinestructure(EXAFS),westudiedthepatternformationmechanismsofbothtypesofstructure.Theresultsindicatethattherateofnucleationinthecrystalgrowthisacrucialelementofaffectthepatternformation.Thepatternselectionbetweenperiodicandfractaltypedependsonthecrystalgrowthspeedandtherateofnucleation.

简介：

简介：Inthiswork,aplasma-solutionsystemwasappliedtothedegradationofAcidOrange7(A07).Theeffectsofinitialconcentrationandtypeoffeedgases(air,oxygen,nitrogenorargon)werestudied.Astheinitialconcentrationincreasedfrom100mg/Lto160mg/L,thediscolourationrateofA07decreasedfrom99.3%to95.9%,whereastheCODremovalratedecreasedfrom37.9%to22.6%.AirprovidedthebestdiscolourationandCODremovalrates(99.3%and37.9%,respectively).Inthepresenceofazero-valentiron(ZVI)catalyst,theA07CODremovalrateincreasedto76.4%.ThedegradationproductswereanalysedbyaGC-MS,revealingthatthedegradationofthedyemoleculewasinitiatedthroughthecleavageofthe-N=N-bondbeforefinallybeingconvertedtoorganicacids.

简介：Thedeviceofacetyleneproductionbyhydrogen(H-)plasmapyrolysiscoalisexaminedanddevelopednotonlyforstudyingtheapplicationoflowtemperatureplasmabutalsoforstudyingthecleanuseofcoal.Thepower-supplycontrolsystemisusedtoensuresupplyingasteadyenergytogenerateandmaintaintheplasmaelectricarcofthedevice.Thehardwareconfigurationandthesoftwaredesignofthesystemaredescribedinthispaper.Verifiedbyexperiments,thissystemcanmeettherequirementsofreal-timeperformance,reliabilityandextensibilityforthedevice.

简介：Acoaxialinsulated-rod-to-cylinderunderwaterstreamerdischargesystemcapableofinjectingplasmaintoalargevolumeofwaterwasdevelopedandemployedtodecolorizeazodyesunsetyellow.Therodtypeanodewascoveredbyaninsulatortubewithawallthicknessof0.4mm.Aseriesofslitswithawidthof20μmto80μmandalengthofabout4mmwerecutontothewalloftheinsulatortube.Dependingonthesolutionconductivity,acylindricaldischargeregionwithalengthof60mmandawallthicknessof5mmto11mmformsinthereactor.Theinfluenceofthesolutionconductivity,pHandpulsefrequencyonthedecolorationofsunsetyellowwasinvestigated.Theresultsshowthatthesolutionconductivityhaslittleeffect,whilethesolutionpHandthepulsefrequencyhavesignificantinfluenceonthedecolorationrateofsunsetyellow.Thedecolorationrateofsunsetyellowisincreasedwiththeincreaseinpulsefrequency.AlowerpHinsolutionpromotesthedecolorationofsunsetyellowwhileahigherpHinhibitsit.

简介：BasedonthesinglebiasingelectrodeexperimentstooptimizetheconfinementofplasmainthedeviceofKT-5Ctokamak,dual-biasingelectrodeswereinsertedintotheKT5Cplasmaforthefirsttimetoexploretheenhancingeffectsofbiasingandthemechanismsofthebiasing.Bymeansofapplyingdifferentcombinationsofbiasingvoltagesontothedualelectrodes,thechangesofE_r,whicharethekeyfactorforboostinguptheE_r×Bflowshear,wereobserved.Thetimeevolutionshowedthattheinnerelectrodeplayedamajorroleindual-biasing,whichdrewlargercurrentthantheouterone.Theouterelectrodeproducedlittleinfluence.Itturnedoutthatthedual-biasingelectrodeswereaseffectiveasasingleoneinimprovingtheplasmaconfinement,forthemechanismofbiasingwasessentiallyanedgeeffect.