منابع مشابه
Electron Bombardment of Biological Materials
A study has been undertaken of the rate of inactivation of spores of the ascomycete fungus Aspergillus niger when bombarded in vacuum, with homogeneous beams of cathode rays of energies from 4 to 15 electron kv. and current densities of 1 x 10(-7) to 3 x 10(-6) amperes per square cm. These velocities and densities are in the range of those of showers of secondary electrons produced in biologica...
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Electron yields from clean and oxydized Inconel 625 surfaces have been measured for H', H:, Hef, 0' and Ar+ ions at normal incidence in the energy range 1.5-40 keV. These measurements have been made under ultrahigh vacuum and the samples were freed of surface contaminants by bombarding with high doses of either 20 keV H l or 30 keV Ar+ ions. Differences in yields of oxydized versus clean surfac...
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We studied energy distribution of electrons emitted from samples of the real Cu surface used in the Large Hadron Collider (LHC). The spectra have been detected as a function of scrubbing conditions and have been analyzed by dividing the whole energy range into three energy regions, conventionally termed reflected, rediffused and true-secondary electrons. We observe, for fixed electron impact en...
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Emissions from Titan’s dayside atmosphere at ultraviolet wavelengths were observed by Voyager. The major source was shown to be photoelectron interactions with the neutral N2 present in the atmosphere whether or not Titan was inside or outside Saturn’s magnetosphere. Since discrepancies exist between observations and models, and photoelectrons do not contribute significantly to emissions from t...
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We present a new compact electron gun based on the secondary emission through ionic bombardment principle. The driving parameters to develop such a gun are to obtain a quite small electron gun for an in-flight instrument performing Electron Beam Fluorescence measurements (EBF) on board of a reentry vehicle in the upper atmosphere. These measurements are useful to characterize the gas flow aroun...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2001
ISSN: 0094-8276
DOI: 10.1029/2000gl012320