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简介：TheprecursoryprojectofADSprotonlinearacceleratoristhedevicetoprovideintenseprotonbeamsfortheentiretransmutationsystem,whichhasthefiguresofintensebeamandhighenergy.Asaresult,acontinuousdeflectedbeamwithacertainintensitywoulddeclinetheperformanceoftheacceleratordevicesorevenmakedamageswithin20s.Inordertopreventthiskindofproblem,anintegratemachineprotectionsystemwithfunctionsofstatemonitoringandtimelybeamcuttingisrequiredtoprotectacceleratordevices.

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简介：Spallationtargetrepresentsoneofthemostchallengingcomponentsinacceleratordrivensystems(ADS)sinceitisthecomponentcouplingtheacceleratorandthesub-criticalcore.Itissubjectedtobombardmentofintenseprotonbeamandveryhighthermalloadinastrongradiationfield.TheirradiatedLBEtargetposesseverehandlingproblemsforthemaintenancestaffandotherscientistsduetoitsresidualactivity[1].ToassistthedesignofADS,thegeneralradiologicalsafetyaspectsoflead,lead-bismutheutectic(LBE)andtungstenspallationtargetwerestudiedwithMCNPX2.7code[2].Thespallationtargetwasirradiatedbya250MeV,10mAprotonbeamproducedbyalinearprotonaccelerator.Theneutronyield,neutronspectrum,residualproductionandtimeevolutionfortheirradiatedtargetwereanalyzed.

简介：Twocompactandintense2.45GHzpermanentprotonsourcesandtheircorrespondinglowenergybeamtransport(LEBT)systemsweredevelopedsuccessfullyforChinaAcceleratorDrivenSub-criticalsystem(C-ADS)in2014,oneofwhichwasbuiltatIMP,LanzhouandtheotheratIHEP,Beijing.Bothprotonsourcescandeliverstable10mA/35keVprotonbeamsatCWmodetotheentrancesofthedownstreamRFQs.AsshowninFig.1,thebeamsextractedbya3-electrodeextractionsystemaretransportedbytheLEBTsystem,whichiscomposedof2identicalsolenoids,andintothe3.2or2.1MeVradio-frequencyquadrupole(RFQ).Inordertoensuresuperconductingcavitiescommissioningandprotection,anelectrostatic-chopperhasbeendesignedandinstalledintheLEBTlinethatcanchopthecwbeamFig.2Totalhydrogenionbeamcurrentversusinputpower.intoapulsedone.Theachievedfall/risetimeofthechopperislessthan20ns.

简介：PhasescanapplicationisveryimportantsoftwareforADSLinacbeamtuning.Thescan/measuretoolsinOpenXALwasusedpreviously.Inordertoimprovethescanningefficiency,anewphasescanapplicationwasdeveloped.ThePythonwasselectedastheprogramminglanguagetomakethedevelopmenteasier.

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简介：隐藏的对称和一个无限的集合广告5S5上的格林Schwarz超弦的非局部的保存水流被Bena等指出了。在这篇论文，我们证明在MaurerCartan方程和运动的方程之间双的农夫在格林Schwarz超弦的moduli空格给隐藏的对称。因此由扭曲的转变vielbeins，我们能表示纸的水流[我。Bena，J。Polchinski，和R。Roiban，Phys。加快。D69(2004)046002]作为宽松的连接由一唯一光谱参数。

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简介：建立了燃耗耦合计算方法，并用基准题对其进行了验证。利用传统核数据库和高能数据库计算了热功率为1000MW的ADS堆芯在不同燃耗下的有效增殖因数keff、有外源的有效增殖因数keff,s、质子束流强度Ip、MA核素的嬗变率及嬗变支持比。结果表明：传统核数据库和高能核数据库下计算的keff间的最大偏差及keff,s间的最大偏差均约为1%；传统核数据库下，Ip每300d平均增加7mA，MA核素的嬗变率为29.9%，嬗变支持比为36.7，能核数据库下对应的Ip为8mA，MA核素的嬗变率为30.5%，嬗变支持比为37.3。这说明高能核数据库对MA核素嬗变物理参数的影响与传统核数据库的影响基本相当。

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