極性冷分子的靜電操控與Stark減速的研究.pdf

1、華東師范大學博士學位論文極性冷分子的靜電操控與Stark減速的研究姓名：鄧聯(lián)忠申請學位級別：博士專業(yè)：光學指導教師：印建平20080401AbstractAbstractGettingeverbettercontrolOVerboththeinternalandexternaldegreesoffreedomofgasphasemoleculeshasbeenanimportantthemeinmolecularphysicsdurin

2、gthelasttwodecadesInterestinthefieldofcoldmoleculesistriggeredbyvariouspotentialapplicationsandbythepromiseoftheOCCUITenCOofinterestingnewphysicsandchemistry謝mmoleculesoflowtemperaturesandhi曲densitiesThisthesisisdedicate

3、dtothestudyofmanipulationofcoldpolarmolecules、析nlelectrostaticfieldsfocusingonelectrostaticguidingelectrostaticsplittingandStarkdecelerationofcoldpolarmoleculesWeproposeanovelschemeofelectrostaticguidingofcoldpolarmolecu

4、les，whichisbasedonasinglechargedwireAnanalyticexpressionforelectricalfielddistributioninfreespaceisderived，andtherelationshipsbetweentheelectricalfielddistributioninfreespacetheStarkpotentialsofmetastableCOmolecules，thei

5、rcorrespondingelectricaldipolargradientforceinsidetheguideandtheparametersoftheguidingsetupareanalyzedindetailAbriefintroductionaboutitspotentialapplicationsinmoleculeopticsispresentedaswellBasedontheaboveelectrostaticgu

6、ideaVsh印edmolecularbeamsplitter(MBS)isconceivedWeanalyzetheelectricalfileddistributioninsidetheMBS，andsimulatethedynamicsofpassing坫ND3moleculesofweak—field—seekingstatethroughtheMBSusingMonteCarlomethodThesplittingratioo

7、ftheMBScanbeeasilyadjustedbychangingthehi曲voltagesappliedonthewiresofthetwooutputbranchesAsanefficienttechniqueforproductionofcoldmolecules謝mverylowvelocities，StarkdecelerationhasgrownrapidlyOVerthecarsWecalculatetheener

8、gystructureofCH3FmoleculesinexternalelectricalfieldsaswellastherotationalpopulationsofsupersonicCH3FmolecularbeamsAsimpleanalyticmodelisbeingusedtoanalyzethemotionofweakfieldseekingCH3Fmoleculesinsidethedeceleratorinclud