激光誘導(dǎo)Cu、Al等離子體發(fā)射光譜的實驗研究.pdf

1、、廠9061957L分類Q三ii一密牲澎』e衙瓤史學(xué)碩士學(xué)位論文激光誘導(dǎo)cu、Al等離子體發(fā)射光譜的實驗研究薛思敏導(dǎo)師姓名職稱：睦墨薹：一盤芷一墼塑一一專業(yè)名稱：巫魚盆王塹堡研究方向：一墼查釜離王堡當(dāng)盤論文符辯口期^三!!i生i旦學(xué)位授予時間：一型蚯主l旦答辯委員會主席評閱人二00六年五月ABSTRACTInviewoflaserablationhasbeenwidelyusedasvariousresearchdomains，thei

2、nteractionmechanismofalaserpulsedwithsolidtargetsarosetheinterestingofmoreandmorerelevantscholars，Includinglaserplasmaformationablationofthesamplesurface，vaporizationandex5citationofdifferentspeciesTheprocessesareknownto

3、dependOUthelaserpulsecharacteristics(suchasenergypulsedurationwavelength，interactingtimeandSOon)，thephysicalandchemicalcharacteristicsofsamples，environmentalconditionaswellasbuffergasTheprocessesarerathercomplexManyschol

4、arshavehadplentifulresearchontheablatingrateoftarget，averagekinetic，energyoftheproductionandrayradiationlawoftheproductionbythewayofchangingtheinteractingcondition，includinglaserwavelength，pulseduration，intensitytargetma

5、terialandthepressureofenvironmentgasandotherfactorsThecomprehensionisstillnotverycladtyatpresentTheenergystateofablatingparticle，time—spaceactionandtheirrelevantmechanismneedtoberevealedandperfectedgraduallyInthisthesis，

6、thebasiccharacterofCuandA1plasmaarestudiedbytheemissionspectrumwhichisproducedintheconditionoflaserablationandadditionalelectricfieldFollowingarcthedetails(1)TheresearchoflaserinducedCuplasmaemissionspectrumLaserinducedC

7、uplasmainArbuffergasarestudiedThespaceresolvedspectraaremeasuredinthewavelengthof440nm～540nmatthe350mJ／pulseoflaserenergyUnderthemodeloflocalthermodynamicequilibrium，theelectronictemperaturesofCuplasmaarededucedtobeinthe

8、104scalebytherelativelineintensitiesThedependenceofemissionspectralineintensityandelectronictemperatureandFWHM(thefullwidthhalfmaximum)onthespaceandpressureofbuffergasarestudiedTheresultsshowthatintensityoftheCuspectrall

9、inesdecreasebuttheintensityoftheArionspectrallinesandbackgroundincreasecomparingthepressureof100kPawith50kPainArambientgasAtthesametime，thebroadeningincreaseswithincreasingthepressureofbuffergas(2)Anexperimentalinvestiga

10、tiononthepropertiesofLaserinducedA1plasmaunderadditionalelectric丘eldTheplasmaisproducedbyablatingA1targetwithQswitchNd：YAGLaser(wavelength106，pulsewidth10ns)A1emissionspectrumareobservedinthelowairpressureandthedirectele