Optimizing EELS acquisition
Optimizing EELS acquisition
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DOI：
10.1016/j.ultramic.2008.02.003
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发表时间：
2008-08-01
期刊：
影响因子：
2.2
通讯作者：
Keast, Vicki J.
中科院分区：
文献类型：
--
作者：
Bosman, Michel;Keast, Vicki J.
一种光谱采集方法。称为分箱增益平均，将描述和测试。该方法通过对一系列CCD像素的增益进行平均，有效地抑制了系统噪声或相关噪声。因此，获得了改进的信噪比，允许检测非常微弱的信号。同时。即使长时间采集，光谱能量分辨率也不会降低。结果表明，该方法可以显著提高电子能量损失谱和电子能量损失图的采集速度和质量。将给出双离子散射（即探测第二个硼k边）和近红外和可见能量范围内金表面等离子体的映射的例子。(c) 2008 Elsevier B.V.版权所有
A method for spectral acquisition. called binned gain averaging, will be described and tested. Systematic or correlated noise is efficiently suppressed with this method by averaging the gain over a series of CCD pixels. As a result, improved signal-to-noise ratios are obtained that allow the detection of very weak signals. At the same time. the spectral energy resolution is not degraded - even for long acquisition periods. It will be demonstrated that with this method, it is possible to significantly enhance the acquisition speed and quality or electron energy-loss (EEL) spectra and EELS maps. Examples will be given of double ionic scattering (i.e. the detection of the second boron K-edge) and the mapping of gold surface plasmons in the near-infrared and visible energy range. (c) 2008 Elsevier B.V. All rights reserved.