First results from a retarding field angle-resolved analyzer

A retarding field display analyzer, similar to that used in LEED, is discus sed. It uses four retarding field grids and projects the electron distribut ion onto a hemispherical phosphor screen. However, this analyzer has no coa xial electron gun, which permits measurements of electron intensity over a large angular range. A fiber-optic faceplate projects the hemispherical ima ge onto a plane, where the light intensity is measured ex situ with a ki,oh dynamic range CCD camera. This analyzer is optimized for angle-resolved Au ger and photoemission spectroscopy. We evaluate the effectiveness of this a nalyzer for the measurement of angle-resolved diffraction patterns for use in electron holography. (C) Elsevier Science Inc., 1999. All rights reserve d.