AVS 63rd International Symposium & Exhibition
    Applied Surface Science Tuesday Sessions
       Session AS-TuP

Paper AS-TuP12
Improving the Performance of the Cylindrical Mirror Analyzer by Electrode Segmentation

Tuesday, November 8, 2016, 6:30 pm, Room Hall D

Session: Applied Surface Science Division Poster Session
Presenter: David Edwards, Jr, IJL Research Center
Correspondent: Click to Email

Electrode segmentation of the cylindrical mirror analyzer has been shown to significantly improve the resolution of the standard instrument. The high precision solution which had been found for the 42.3 device is shown in this report to exist in fact for an extended set of input angles or equivalently for a range of sample positions. This has allowed a significant limitation of the CMA, namely the critical dependence of instrument performance on sample position, to be largely overcome. In addition by placing the sample at the minimum in the curve of resolution vs sample position, a resolution of ~.000045 has been obtained for a +-6 degree bundle an improvement of a factor of ~40 over the standard spectrometer. Thus electrode segmentation has been found not only to significantly improve the device performance, but in fact to enable its high precision to be realized.