简介：AsimulationonthepropagationoflowerhybridwaveinEASTisconducted.Raytracing,evolutionoftheparallelrefractiveindex,andpowerdepositionprofilesinaD-shapedconfigurationwerecalculated.Resultsshowthatwavepropagationisaffectedbytheplasmacurrent,density,magneticfield,andpowerspectrum,etc.leadingtoadifferentpowerdeposition.ThisishelpfulinunderstandingtheLHCDexperimentsonEAST.

简介：Intheplasmasheathanarrowplasmachannelgeneratedbyultraintenselaserpulsesissimplifiedasaspecialcylindricalandhollowplasmawaveguidewiththeinfinitethicknessoftheplasmacladding.Theelectromagneticwave(EM)propagationpropertiesoftheplasmachannelnearthecutoffandfarfromthecutoffareconsidered.TheoreticalanalysisshowsthatTE0mandTM0mandhybridmodesemergeintheplasmachannel,whichisinfluencedbythenormalizedfrequencyparameterBandnumericalapertureNA.Thecutoffsofthevariousmodesareapproximated.Single-modeoperationispossiblewithoutahigh-frequencylimitationinthechannel.

简介：Experimentsonlowerhybridwave(LHW)couplingwereinvestigatedintheHT-7tokamak.GoodcouplingofLHWplasmahasbeendemonstratedatdifferentconditionsintheHT-7tokamak.RelevantresultshaveprovedthatLHW-plasmacouplingisaffectedbythephasedifferencebetweenadjacentwaveguides.Furthermore,theedgedensityaroundthegrillandrelevantcouplingcanbeadjustedbychangingtheplasmalineaveragedensityorthegapvaluebetweentheLHgrillandthelastclosedfluxsurfaces(LCFS).ItisfoundthatthecouplingofLHWsbecomespoorwhentheedgedensityaroundtheLHgrillislargeenoughintheHT-7tokamak,andthatcouplingremainsgoodwithaproperedgedensity.WithincreasingLHWpower,itisalsofoundthatthereflectioncoefficients(RCs)increaseduetonon-lineareffectsunderconditionsoflowedgerecycling,butcandecreaseunderhighedgerecycling.Theedgedensitydependsmainlyonthecompetitionbetweentheponderomotiveforce(PMF)andtheedgerecyclingintensityintheHT-7tokamak.

简介：Basedontheprinciplethatone-endedelectromagneticsurfacewavecandriveaplasmaantenna,therelationbetweentheeffectivelengthofanantennacolumnandtheappliedradiofrequency(RF)powerwasstudiedboththeoreticallyandexperimentally.Thedensitydistributionalongthcantennacolumnaswellastheelectrontemperatureindifferentconditionswereinvestigated.Thecharacteristicsofthereceptionoflocalfrequencymodulated(FM)electromagneticwavebytheplasmaantennawerecomparedwiththatbyacopperantennawithsamedimensions.Theresultsshowthatitisfeasibletotakeplasmaantennasasreceivingones.更多还原

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简介：Anovelsurfacewaveplasma(SWP)sourceexcitedwithcylindricalTeflonwaveguidehasbeendevelopedinourpreviouswork.Theplasmacharacteristicshavebeensimplystudied.Inthiswork,ourexperimentaldevicehasbeensignificantlyimprovedbyreplacingtheTeflonwaveguidewithaquartzrod,andthenbettermicrowavecouplingandhighergaspuritycanbeobtainedduringplasmadischarge.Theplasmaspatialdistributions,bothinradialandaxialdirections,havebeenmeasuredandtheeffectofgaspressurehasbeeninvestigated.Plasmadensityprofilesindicatethatthisplasmasourcecanproduceuniformplasmainanaxialdirectionatlowpressure,whichshowsitspotentialinplasmaprocessingonacurvedsurfacesuchasaninnertubewall.Asimplifiedcircularwaveguidemodelhasbeenusedtoexplaintheprincipleofplasmaexcitation.Thedistinguishingfeaturesandpotentialapplicationofthiskindofplasmasourcewithahardwareimprovementhavebeenshown.

简介：Theprocessofionheatingbyamonochromaticobliquelypropagatinglow-frequencyAlfvenwaveisinvestigated.Thisprocesscanberoughlydividedintothreestages:atfirst,theionsarepickedupbytheAlfvenwaveinseveralgyro-periodsandabulkvelocityinthetransversedirectionisachieved;then,theionsarescatteredinthetransversedirectionbythewave,whichproducesphasedifferencesbetweentheionsandleadstoionheating,especiallyintheperpendiculardirection;andfinally,theionsarestochasticallyheatedduetothesubcyclotronresonance.Inthispaper,withatestparticlemethod,theefficiencyandtimescaleoftheionstochasticheatingbyamonochromaticobliquelypropagatinglow-frequencyAlfvenwavearestudied.Theresultsshowthatwiththeincreaseoftheamplitude,frequency,andpropagationangleoftheAlfvenwave,theefficiencyoftheionstochasticheatingincreases,whilethetimescaleoftheionstochasticheatingdecreases.Withtheincreaseoftheplasmabetaβ,theionsarestochasticallyheatedwithlessefficiency,andthetimescaleincreases.Wealsoinvestigatetheheatingofheavyionspecies(He2+andO5+),whichcanbeheatedwithahigherefficiencybytheobliqueAlfvenwave.

简介：Ananalyticalstudyispresentedonthemodaldispersioncharacteristics,groupvelocity,andeffectivegroup,aswellasthephaseindexofaternaryonedimensionalplasmaphotoniccrystalforanobliquelyincidentelectromagneticwaveconsideringtheeffectofcollisionsinplasmalayers.Thedispersionrelationisderivedbyusingthetransfermatrixmethodandtheboundaryconditionsbasedonelectromagnetictheory.Thedispersioncurvesareplottedforboththenormalphotonicbandgapstructureandtheabsorptionphotonicbandgapstructure.Itisfoundthattheincreaseintheangleofincidenceshiftsthephotonicbandgaptowardhigherfrequencies.Also,thecutofffrequencyisindependentofcollisions.

简介：成像板是一种新型的集成式面探测器系统，近年来被广泛用于X光，特别是高强的同步辐射X光实验。为改善BSRF的探测条件和水平，最近BSRF购进了一套日本FujiFilm公司生产的BAS－2500成象板探测系统，提出供给广大用户使用。本文介绍了IP的工作原理、特性及应用，并对BSRF的IP探测系统作一简要介绍。

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简介：新型硅P-N结光电超二极管对光于能量响应范围已达到了X射线范围。它具有线性范围大，能量响应范围宽，量子效率高等优点，因而适用X射线之探测。本文介绍了以光电二板管构成同步辐射XAFS探测器替代传统的电离室探测器组合的研究工作，给出了的探测器结构设计，工作原理，实验结果及讨论。

简介：采用在位高压Raman光谱和高压同步辐射能散X射线衍射技术，在室温下对晶粒尺寸为10nm的锐钛矿TiO2进行了压致相变研究，压力范围分别为42．9GPa和23．0GPa，实验结果表明，在16．3GPaTiO2发生了一次结构相变，由原来的锐钛矿结构变为α－PbO2结构（TiO2-Ⅱ），该相变是不可逆的。同体材料TiO2的高压相变结果比较，由于晶粒尺寸的效应，纳米尺寸的锐钛矿TiO2的相变压力明显高于体材料的相变压力。

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简介：以流向事故传感器为例,运用可靠性技术对核工厂使用的专用传感器的失效规律进行分析,对失效分布数据进行了拟合计算,得到了传感器的特征寿命,从传感器结构方面进行了可靠性分析。

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简介：文章对某单位的锆复合板反应器设备泄漏原因进行了分析,先后采用两种方法进行泄露修补。对比两次不同的返修方法,认为对安全运行多年的设备,其结构和应力分布已经固化,如果有泄漏,漏点不会很大,但因为设备冷态检查与最终使用工况有较大区别,返修完成前后应模拟工况进行热试,这样才能彻底找到漏点,一次性返修好。对这台设备的返修总结,为类似使用多年的设备返修提供经验。

简介：本文给出了蒸汽发生器的设备简化过程和方法，并对蒸汽发生器简化模型进行模态分析，将分析结果与设计方模型的模态分析结果进行比较，以验证设计的合理性，结果证明二者基本一致。

简介：研制一套具有自主知识产权的新型桶外水泥固化技术,运用头脑风暴法提出不同方案,进一步进行理论分析比较,确定了间歇式桶外圆柱形混合器为最终研制方案.通过对最终方案进一步细化分析比较,设定研制目标,制定对策及实施,成功的研制出新型的间歇式桶外圆柱形混合器,使得完成一次水泥固化不超过10分钟,填充率小于95％,打破了国外桶外水泥固化技术断地位及技术封锁.

简介：阻尼器注油及更换安装是主设备启动前的最后一道工序，保质保量按期顺利完成该项工作将为主工艺系统的启动达产提供有力保障。为此，针对工作初期阻尼器安装一次合格率较低这一问题，文章通过对数据的收集分析，发现问题的症结在于阻尼器垫圈沾油和翻边。运用头脑风暴法进行了原因分析，通过末端因素的逐一确认，得到三条主要原因，合理制定对策并逐步实施，最终将安装一次合格率从55．00％提高到了87．50％，确保了阻尼器更换安装节点目标的顺利实现。

简介：2004年11月5日，中国原子能科学研究院举行2004年游泳池反应堆(SPR)场区应急演习，国家环保总局核安全司及核安全中心有关专家到现场进行监督评价。此次演习自早9：30分开始至10：45分结束，历时75分钟，验证了原子能院核事故应急计划的有效性、检查应急组织的应急响应能力。