نتایج جستجو برای: electron spectrometer
تعداد نتایج: 327383 فیلتر نتایج به سال:
The development and characterization of a prototype temperature tolerant (capable operation up to at least 100 °C) particle counting electron spectrometer with an AlInP detector is reported. This the first time that response electrons (β − particles) has been was custom made circular mesa (200 μm diameter) Al 0.52 In 0.48 P p + -i-n (2 i layer) photodiode; this coupled low-noise charge-sensit...
We describe an electron spectrometer designed for a precision measurement of the neutron β-asymmetry with spin-polarized ultracold neutrons. The spectrometer consists of a 1.0-Tesla solenoidal field with two identical multiwire proportional chamber and plastic scintillator electron detector packages situated within 0.6-Tesla fieldexpansion regions. Select results from performance studies of the...
A velocity selector is described which is designed for measurement of the total collision cross section of electrons in the energy region below one volt. The system determines the distributions of times of flight of single electrons over a measured path at selected pressures of a specimen gas. The electrons are generated by repetitive illumination of a photo-emitter by a spark gap, pass over a ...
This article presents a new type of low-energy crossed-beam electron spectrometer for measuring angular differential cross sections of electron-impact excitation of atomic and molecular targets. Designed for investigations at energies close to excitation thresholds, the spectrometer combines a pulsed electron beam with the time-of-flight technique to distinguish between scattering channels. A l...
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