نتایج جستجو برای: antiproton
تعداد نتایج: 1381 فیلتر نتایج به سال:
Charges in cold, multiple-species, non-neutral plasmas separate radially by mass, forming centrifugally separated states. Here, we report the first detailed measurements of such states in an electron-antiproton plasma, and the first observations of the separation dynamics in any centrifugally separated system. While the observed equilibrium states are expected and in agreement with theory, the ...
The ALPHA experiment has succeeded in trapping antihydrogen, a major milestone on the road to spectroscopic comparisons of antihydrogen with hydrogen. An annihilation vertex detector, which determines the time and position of antiproton annihilations, has been central to this achievement. This detector, an array of double-sided silicon microstrip detector modules arranged in three concentric cy...
We report the successful application of space-charge forces of a low-energy electron beam for improvement of particle lifetime determined by beam-beam interaction at a high-energy collider. In our experiments, an electron lens, a novel instrument developed for the beam-beam compensation, was set on a 980-GeV proton bunch at the Fermilab Tevatron proton-antiproton collider. The proton-bunch loss...
Abstract. The explicit procedures are described for reconstruction of the full set of helicity amplitudes in proton-proton and proton-antiproton elastic scattering. The procedures are based on the derivative relations for the helicity amplitudes in s-channel, on the explicit parametrization of the leading spin non flip amplitudes and crossing symmetry relations. Asymptotic theorems are used for...
After the completion of the antiproton programme, the Low-Energy Antiproton Ring (LEAR) will be able to serve as an accumulator ring for heavy ions in the injector chain of the Large Hadron Collider (LHC). For injection and accumulation, a scheme is proposed, which exploits both the longitudinal and the transverse acceptances of LEAR. Compared to a classical multiturn injection, a factor 3 to 5...
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