Instrumental Effects of the Retarding Grids in a LEED Apparatus
- 1 August 1969
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 40 (8) , 1075-1079
- https://doi.org/10.1063/1.1684156
Abstract
We have studied the characteristics of the retarding grids in a low energy electron diffraction apparatus by measuring the impact spectra of a tungsten (100) crystal with 66 to 200 eV electron beams. Our results indicate that the retarding field method when properly adjusted is useful for analyzing scattered electrons of energy loss which is small compared to the beam energy. At large energy loss, however, field penetration and scattering from grids may contribute considerably to the measured secondary electron energy distribution which makes the measurement less reliable.Keywords
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