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2 results about "Electronvolt" patented technology
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In physics, an electronvolt (symbol eV, also written electron-volt and electron volt) is the amount of kinetic energy gained (or lost) by a single electron accelerating from rest through an electric potential difference of one volt in vacuum. When used as a unit of energy, BIMP has fixed the definition of the electronvolt equal to 1.602176634×10⁻¹⁹ joules (symbol J), even though the exact measurement of the charge of an electron continues to be improved and as of 2014 is −1.6021766208(98)×10⁻¹⁹ C.
An ultra-low-energy monochromated electron beam generation and transport device
The application discloses an ultralow-energy monochromatic electron beam generation and transmission device, and relates to the technical field of electron optical instruments, which comprises the following units arranged in sequence along an electron beam transmission path: an electron generation unit for generating an initial electron beam; an injection lens unit for receiving the initial electron beam generated by the electron generation unit; a monochromator unit having an inlet and an outlet and being used for energy screening of the electron beam from the injection lens unit to reduce energy spread thereof; and a deceleration and focusing lens unit for receiving the monochromatized electron beam output from the outlet of the monochromator unit. The device can output an ultralow-energy electron beam with a continuously adjustable energy of 0 eV to 5 eV through the cooperative work of the electron generation unit, the injection lens unit, the monochromator unit and the deceleration and focusing lens unit, and the energy spread is better than 90 meV, thereby improving beam monochromaticity and transmission efficiency.
Owner:EAST CHINA NORMAL UNIV