نتایج جستجو برای: particle accelerators
تعداد نتایج: 179538 فیلتر نتایج به سال:
Assuming that the lightest supersymmetric particle (LSP) is the lightest neutralino χ̃, we present a detailed exploration of neutralino-stau (χ̃− τ̃ ) coannihilation channels, including analytical expressions and numerical results. We also include χ̃ coannihilations with the ẽ and μ̃. We evaluate the implications of coannihilations for the cosmological relic density of the LSP, which is assumed to b...
To evaluate the real radiological and economic consequences of future dismantling of particle accelerators, up to now insufficient information was available in literature or even at the individual accelerator facilities themselves. DG ENV/C3 of the European Commission launched a project with focus on gathering quantitative and scientifically sound data on the number of accelerators in the EU, o...
Solar energetic particles are believed to originate from two di*erent sources, solar (ares and coronal mass ejections. These two sources are the most energetic particle accelerators in the heliosphere, as they can accelerate electrons from 10 keV to a few MeV and protons from a few MeV to a few GeV. In this contribution, we restrict our presentation to the case of solar (ares, by reviewing the ...
We review the main ideas discussed during the meeting and propose methods for a new generation of space accelerators
Laser-plasma particle accelerators could provide more compact sources of high-energy radiation than conventional accelerators. Moreover, because they deliver radiation in femtosecond pulses, they could improve the time resolution of X-ray absorption techniques. Here we show that we can measure and control the polarization of ultra-short, broad-band keV photon pulses emitted from a laser-plasma-...
White-light coronagraphic images of Coronal Mass Ejections (CMEs) observed by SOHO/LASCO C2 have been used to estimate the density jump along the whole front of two CME-driven shocks. The two events are different in that the first one was a "radio-loud" fast CME, while the second one was a "radio quiet" slow CME. From the compression ratios inferred along the shock fronts, we estimated the Alfv...
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