Recent development in measuring methods for electrons, are reviewed according to three categories: track detectors, particle counters and current detectors. Methods for energy measure-ment are also reviewed for both non-magnetic and magnetic types of analyzing. Description is made of those phenomena such as backscattering, secondary electron emission, surface effect, plasma effect, radiation induced current and radiation damage, which are considered to affect the above., measurements with magnitude of the same order or more compared with the signal.
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