激光技术
激光技術
격광기술
LASER TECHNOLOGY
2014年
5期
709-712
,共4页
罗文峰%赵小侠%朱海燕%谢东华%刘娟%付勇
囉文峰%趙小俠%硃海燕%謝東華%劉娟%付勇
라문봉%조소협%주해연%사동화%류연%부용
激光技术%电子温度%电子密度%激光诱导击穿光谱%等离子体%发射光谱
激光技術%電子溫度%電子密度%激光誘導擊穿光譜%等離子體%髮射光譜
격광기술%전자온도%전자밀도%격광유도격천광보%등리자체%발사광보
laser technique%electron temperature%electron density%laser-induced breakdown spectroscopy%plasma%emission spectrum
为了减小谱线自发辐射跃迁几率等参量的不确定性带来的计算误差,采用一种改进型的迭代Boltzmann算法研究了激光诱导水垢等离子体的电子温度,经过12次迭代,线性相关系数由0.7687提高到0.99991,得到水垢等离子体的电子温度为5012K。 Lorentz函数拟合CaⅡ393.37nm得到水垢等离子体的电子密度是5.7×1016 cm-3,远高于临界值6.4×1015 cm-3,证明激光诱导水垢等离子体满足局部热力学平衡模型。结果表明,本方法不仅操作简单,而且可以明显提高等离子体特征参量的求解精度。
為瞭減小譜線自髮輻射躍遷幾率等參量的不確定性帶來的計算誤差,採用一種改進型的迭代Boltzmann算法研究瞭激光誘導水垢等離子體的電子溫度,經過12次迭代,線性相關繫數由0.7687提高到0.99991,得到水垢等離子體的電子溫度為5012K。 Lorentz函數擬閤CaⅡ393.37nm得到水垢等離子體的電子密度是5.7×1016 cm-3,遠高于臨界值6.4×1015 cm-3,證明激光誘導水垢等離子體滿足跼部熱力學平衡模型。結果錶明,本方法不僅操作簡單,而且可以明顯提高等離子體特徵參量的求解精度。
위료감소보선자발복사약천궤솔등삼량적불학정성대래적계산오차,채용일충개진형적질대Boltzmann산법연구료격광유도수구등리자체적전자온도,경과12차질대,선성상관계수유0.7687제고도0.99991,득도수구등리자체적전자온도위5012K。 Lorentz함수의합CaⅡ393.37nm득도수구등리자체적전자밀도시5.7×1016 cm-3,원고우림계치6.4×1015 cm-3,증명격광유도수구등리자체만족국부열역학평형모형。결과표명,본방법불부조작간단,이차가이명현제고등리자체특정삼량적구해정도。
To reduce the calculation error induced by the uncertainty of the parameters , such as spectrum spontaneous emission transition probabilities , the electron temperature of the laser-induced water scale plasma was studied using a modified iterative Boltzmann algorithm .After 12 iterations, the linear correlation coefficient was increased from 0.7687 up to 0.99991 while the electron temperature of the water scale plasma was 5012K.After the fitting of Ca Ⅱ393.37nm by Lorentz function, the electron density of water scale plasma was 5.7 ×1016 cm-3 , much higher than the critical value of 6.4 ×1015 cm-3 .The laser-induced water scale plasma was proved to meet the local thermodynamic equilibrium model . The experimental results show that this method not only is simple , but also can improve the solution accuracy of the characteristic parameters of the plasma significantly .