CAJ | 학술논문

为了改善激光诱导等离子体的辐射特性,利用由高能最钕玻璃脉冲激光器、组合式多功能光栅光谱仪和CCD数据采集处理系统构成的光谱测量装置,以国家土壤标样为靶,研究了NaCl样品添加剂对激光等离子体辐射强度的影响,并由光谱线的强度和Stark展宽分别计算了等离子体的电子温度和电子密度.实验结果表明:随着NaCl加入量的增加,激光等离子体的光谱强度、信背比、电子温度和电子密度均呈现出先增大而后减小的趋势.当NaCl加入量为15%时,等离子体的辐射强度最大,元素Mn,K,Fe和Ti的谱线强度分别比无添加剂时提高了39.2%,42.5%,53.9%和33.8%,光谱信背比分别提高了64.4%,84.3%,44.5%和58.2%,而等离子体的电子温度和电子密度比无添加剂时分别提高了0.17倍和0.36倍.
위료개선격광유도등리자체적복사특성,이용유고능최녀파리맥충격광기、조합식다공능광책광보의화CCD수거채집처리계통구성적광보측량장치,이국가토양표양위파,연구료NaCl양품첨가제대격광등리자체복사강도적영향,병유광보선적강도화Stark전관분별계산료등리자체적전자온도화전자밀도.실험결과표명:수착NaCl가입량적증가,격광등리자체적광보강도、신배비、전자온도화전자밀도균정현출선증대이후감소적추세.당NaCl가입량위15%시,등리자체적복사강도최대,원소Mn,K,Fe화Ti적보선강도분별비무첨가제시제고료39.2%,42.5%,53.9%화33.8%,광보신배비분별제고료64.4%,84.3%,44.5%화58.2%,이등리자체적전자온도화전자밀도비무첨가제시분별제고료0.17배화0.36배.
In order to improve the radiation characteristic of laser-induced plasma,with the national standard soil taken as the target sample,a laser spectrum analytical system which composed of a high-energy neodymium glass laser,a multifunctional and compact integrated spectrometer,and a CCD detector was used to detect the influence of the NaCl sample additive on the laser plasma radiation intensity.The electron temperature and the electron density of the plasmas were also calculated from the lines intensity and stark broadening of emission spectral line respectively.The experimental results indicated that with the increase in the NaCl additive,the spectral intensity,signal-to-background ratio,the electron temperature,and the electron density all went up firstly and then down.When 15% NaCl was added,the radiation intensity of the plasma reached the maximum value,the spectral lines intensity of element Mn,K,Fe,and Ti increased by 39.2%,42.5%,53.9% and 33.8% compared to that without additive respectively,the spectral signal-to-hackground ratio increased by 64.4%,84.3%,44.55% and 58.2% respectively,while the electron temperature and the electron density of the plasmas were heightened by 0.17 times and 0.36 times respectively.