激光沖擊Cu誘導(dǎo)等離子體光譜實(shí)驗(yàn)分析

16600字 36頁(yè)


摘要在信息化社會(huì)，科學(xué)技術(shù)總是日星月異。尤其是在激光領(lǐng)域，不斷有突破性的研究進(jìn)展。從二十世紀(jì)以來(lái)，發(fā)展過(guò)來(lái)的激光誘導(dǎo)等離子體光譜分析技術(shù)LIBS（Laser Induced Breakdown Spectroscopy）在物質(zhì)元素研究和分析領(lǐng)域取得一大成果。LIBS已經(jīng)在工業(yè)領(lǐng)域的各個(gè)發(fā)光面起著相當(dāng)重要的作用?；仡櫼幌录す庹T導(dǎo)等離子體光譜分析技術(shù)的發(fā)展歷程，我們從時(shí)間上，整個(gè)過(guò)程可分成三階段：從六十年代到七十年代之間，實(shí)驗(yàn)室中普遍采用光電火花源來(lái)誘導(dǎo)等粒子，雖然和之前的實(shí)驗(yàn)方法相比，得到的光譜品質(zhì)有所改善但是還是沒(méi)有達(dá)到我們要求的高度，它主要表現(xiàn)在較差的檢測(cè)能力，在分析光譜精度過(guò)程中尤為體現(xiàn)出來(lái)；到了七十年代和八十年代之間，計(jì)算機(jī)技術(shù)的發(fā)展不斷的向前推進(jìn)，時(shí)空分辨技術(shù)得到了更加廣泛的應(yīng)用，我們可以改變材料周?chē)沫h(huán)境參量，再使用激光去沖擊材料誘導(dǎo)等離子體；從九十年代至今，科技跨越式的發(fā)展導(dǎo)致一輪又一輪的科技產(chǎn)品不斷地更新，最終產(chǎn)生了LIBS技術(shù)。這個(gè)突破對(duì)于瞬態(tài)光譜的研究有了本質(zhì)上的推動(dòng)和促進(jìn)，與此同時(shí)，也為經(jīng)后在激光光譜研究領(lǐng)域開(kāi)辟了一番新的天地。
我們需要指出的是作為多學(xué)科交叉結(jié)合的分析測(cè)試技術(shù)——激光誘導(dǎo)等離子體光譜LIBS，是光和物質(zhì)相互作用尤其是光和金屬物質(zhì)相互作用領(lǐng)域的重要研究課題。長(zhǎng)期以來(lái)，LIBS一直都被廣泛的應(yīng)用到礦業(yè)采集，環(huán)境分析，激光加工，激光沖擊等等多個(gè)領(lǐng)域。LIBS可以做到對(duì)微觀物質(zhì)的物理結(jié)構(gòu)，宏觀物質(zhì)的化學(xué)成分組成進(jìn)行檢測(cè)和分析，并且是不限于所要檢測(cè)樣品的尺寸。當(dāng)前，研究者們不斷探索激光誘導(dǎo)過(guò)程中，各種參數(shù)如氣體環(huán)境，靶材的周?chē)h(huán)境，靶材自身的化學(xué)特性物理特性對(duì)實(shí)驗(yàn)的影響。
本文我們首先介紹了我們這次試驗(yàn)所需要的主要器材以及器材的詳細(xì)信息，這是重要的，因?yàn)槠鞑牡倪x擇對(duì)于采集到的光譜以及最終光譜分析的精度有著很大的作用。然后我們需要掌握本實(shí)驗(yàn)的原理方法，列出我們這次試驗(yàn)需要解決的問(wèn)題，指出我們這次試驗(yàn)所需要采用的檢測(cè)手段。然后我們進(jìn)行實(shí)驗(yàn)，采集數(shù)據(jù)，分析光譜。我們通過(guò)控制變量法，控制激光光能始終保持不變，改變延遲類(lèi)型，獲得不同的光譜。對(duì)這些光譜進(jìn)行比較、分析，最終得到具有可行性的規(guī)律。為以后LIBS應(yīng)用到工業(yè)領(lǐng)域飛躍作出努力。
關(guān)鍵詞 激光沖擊 等離子體 光電檢測(cè) 光譜分析


The impact of transient laser-induced plasma spectroscopy experiments Cu analysis
Abstract with the development of the technology of laser,Laser Induced Breakdown Spectroscopy named shortly LIBS leads to a new time when we start to analyze the element substance ,which emerged in 2000s. This technology has been applied in various industry fields.for LIBS ,it went through about three period: we often use optic-electric fire to induce plasma in the labor.though the optic spectrum we get in that way has been improved ,it still can not meet our command.it is weak in detecting ,especially when it is applied in analysis of spectrum accuracy.when it comes to the 1960s ,in the following 10 years ,the PC technology is developing fast as it was .temporal special resolution has been applied in the broaden field. maybe we can change the environment parameters surrounding the target material or something dealing about material itself.and then we can use LASER to lash the material for the plasma .from the 1990s to this day,technology has stepped stride.it goes on from that time to next time and never delays,which leads to the technology LIBS.the breakthrough can motivate the research of the instantaneous spectrum in the potential.and also due to it,a new research area has been exploited about the spectrum studied by laser.
what we need to point is that as a analysis detecting technology including various branches of subjects ------laser induced plasma for spectrum LIBS,is an important studying project on optic-interacted substantial especially on interacted mental abstention
during a long time ,LIBS has always been applied on the mining collection ,analyzing environment,laser processing ,laser lashing and so on.LIBS can detect the microscopic substantiation LIBS can be done on the physical structure of the material microstructure and chemical composition of the composition of macroscopic matter detection and analysis, and is not limited to the size of the sample to be detected. Currently, researchers are continuing to explore laser-induced process, various parameters such as gas environment surrounding the target, the target's own impact on the chemical properties of the physical characteristics of the experiment.
In this lecture. we firstly introduce the main equipments we need in the experiment and some information in detail about the equipment.what we use counts much,the choice of the devices can affect the spectrum and the accuracy of the last analysis .and then we need to introduce the principal about the laser lashing Cu to induce he plasma and its detection about spectrum on shot time. besides.we point out the method we need to detect in the experiment. next,we start to experiment,gather data,analyzing spectrum.we can control the energy of laser at a constant level.change the kind of delay to get different spectrum.after comparing and analyzing ,we seem to get a proper law which can help to apply LIBS to industry field .
KEY WORDS: LASER lash Plasma optic-electric detection s..