Time Resolved Electron Energy Loss Spectrometer

时间分辨电子能量损失谱仪

• 批准号: 07555009
• 负责人: NISHIJIMA Mitsuaki
• 金额: $ 5.57万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555009/
• 关键词: EELS; Surfece; time-resolved; electron spectroscopy; vacuum; 電子エネルギー損失分光; 分散補償の原理

An EELS spectrometer was designed by reffering to the dispersion compensation principle used by Siegbahn for X ray photoelectron spectroscopy. In this case, (1) in principle, all currents which enter the monochromater can be used for EELS measurements, and (2) pass energy is high, and thus, the sample current is high. Troubles are aberration and space charges. In the case of 180ﾟ semispherical spectrometer, the focus is at the egde of the 180ﾟ sphere and for the sample to be positioned, lenses which do not lose information on positions are needed between the output of the monochrometer and the sample and between the sample and the input of the analyzer. In this study, the 90ﾟ sector was used for the spectrometer. The optimization of the energy resolution and transmission was performed by the design of several electron guns. The obtained energy resolution was 20 meV,and the corresponding detector current was 200pA.These results are expected to give important informations on the future design of a time-resolved spectrometer by the use of 180ﾟ sphere.

参考Siegbahn用于X射线光电子能谱的色散补偿原理设计了EELS光谱仪。在这种情况下，（1）原则上，所有进入单色仪的电流都可以用于EELS测量，（2）传递能量。高，因此，样品电流高，问题是像差和空间电荷。在180°半球形光谱仪的情况下，焦点位于。 180°球体的边缘以及要定位的样品，在单色仪的输出和样品之间以及样品和分析仪的输入之间需要不丢失位置信息的透镜。谱仪采用90ﾟ扇区，通过多支电子枪的设计对能量分辨率和传输进行优化，得到的能量分辨率为20 meV，对应的探测器电流为200pA。预计结果将为未来使用 180° 球面设计时间分辨光谱仪提供重要信息。

项目成果

M. Date: "Explosive production of CO_2 from (NO+CO)/Pd(100)" Surf. Sci.341. L1096-L1100 (1995)

M. 日期：“(NO CO)/Pd(100) 爆炸产生 CO_2”Surf。

N.Minami: "Atomic-Hydrogen-Induced Restructuring of Si (100) (2x1)-K" Surf.Sci.337. L783-L788 (1995)

N.Minami：“原子氢诱导的 Si (100) (2x1)-K 重组”Surf.Sci.337。

M.Date: "Interaction of NO with CO on Pd (100)" Surf.Sci.350. 79-90 (1996)

M.Date：“NO 与 CO 在 Pd (100) 上的相互作用”Surf.Sci.350。

N. Minami: "Atomic-Hydrogen-Induced Restructuring of Si (100) (2X)-K" Swf. Sci.337. L783-L788 (1995)

N. Minami：“原子氢诱导的 Si (100) (2X)-K 重组”Swf。

M.Date: "Interaction of NO with CO on Pd (100)" Surf.Sci.350. 75-90 (1996)

M.Date：“NO 与 CO 在 Pd (100) 上的相互作用”Surf.Sci.350。