...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Physics >Langmuir probe measurements and mass spectrometry of plasma plumes generated by laser ablation of La_(0.4)Ca_(0.6)MnO_3
【24h】

Langmuir probe measurements and mass spectrometry of plasma plumes generated by laser ablation of La_(0.4)Ca_(0.6)MnO_3

机译：La_（0.4）Ca_（0.6）MnO_3激光烧蚀产生的等离子体羽的Langmuir探针测量和质谱

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The plasma formed in vacuum by UV nanosecond laser ablation of La_(0.4)Ca_(0.6)MnO_3 in the fluence range of 0.8 to 1.9 J cm~(-2) using both Langmuir probe analysis and energy-resolved mass spectrometry has been studied. Mass spectrometry shows that the main positive ion species are Ca~+, Mn~+, La~+, and LaO~+. The Ca~+ and Mn~+ energy distributions are quite broad and lie in the 0-100 eV region, with the average energies increasing with laser fluence. In contrast, the La~+ and LaO~+ distributions are strongly peaked around 10 eV. The net time-of-arrival signal derived from the measured positive ion energy distributions is broadly consistent with the positive ion signal measured by the Langmuir probe. We also detected a significant number of O~- ions with energies in the range of 0 to 10 eV. The Langmuir probe was also used to measure the temporal variation of the electron density and temperature at 6 cm from the ablation target. In the period when O~- ions are found at this position, the plasma conditions are consistent with those required for significant negative oxygen ion formation, as revealed by studies on radio frequency excited oxygen plasma.
机译：利用朗缪尔探针分析和能量分辨质谱技术研究了在0.8至1.9 J cm〜（-2）的注量范围内通过La_（0.4）Ca_（0.6）MnO_3的UV纳秒激光烧蚀在真空中形成的等离子体。质谱分析表明，主要的正离子种类为Ca〜+，Mn〜+，La〜+和LaO〜+。 Ca〜+和Mn〜+的能量分布范围很广，位于0-100 eV范围内，平均能量随激光通量的增加而增加。相反，La〜+和LaO〜+的分布在10 eV附近强烈达到峰值。从测得的阳离子能量分布得出的净到达时间信号与由Langmuir探针测得的阳离子信号大致一致。我们还检测到大量的O〜-离子，其能量范围为0到10 eV。 Langmuir探针还用于测量距烧蚀目标6 cm处电子密度和温度的时间变化。正如在射频激发氧等离子体的研究所揭示的那样，在此位置发现O-离子期间，等离子体条件与形成大量负氧离子所需的条件一致。

著录项

  • 来源
    《Journal of Applied Physics》 |2014年第7期|073303.1-073303.8|共8页
  • 作者

    Jikun Chen; James G. Lunney; Thomas Lippert; Alejandro Ojeda-G-P; Dieter Stender; Christof W. Schneider; Alexander Wokaun;

  • 作者单位

    Department of General Energy Research, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland;

    School of Physics and CRANN, Trinity College, Dublin 2, Ireland;

    Department of General Energy Research, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland;

    Department of General Energy Research, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland;

    Department of General Energy Research, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland;

    Department of General Energy Research, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland;

    Department of General Energy Research, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号