نتایج جستجو برای: beta beam
تعداد نتایج: 299514 فیلتر نتایج به سال:
PURPOSE In recent years experimental data have indicated that low-energy proton beam radiation might induce a difference in cellular migration in comparison to photons. We therefore set out to compare the effect of proton beam irradiation and X-rays on the survival and long-term migratory properties of two cell lines: uveal melanoma Mel270 and skin melanoma BLM. MATERIALS AND METHODS Cells tr...
In CEBAF, the electron beam from the injector must be sufficiently relativistic to match a 1 GeV recirculated beam in the first linac. The electron beam is produced with a — 130 keV electron gun, then accelerated by a room temperature, graded-beta standing wave linac, capture section, from 130 keV to 510 keV before enters two 5-cell superconducting RF cavities for further acceleration. Present ...
Forward protons with momenta close to the beam momentum arise either from elastic scattering or from single or double diffraction. These protons are very close to the beamline and can only be measured downstream using “beam close detectors”. In this paper we present a complete study of the optics (low, medium and high beta), possible locations of the detectors and running scenarios for these me...
Observations of the beam-beam interaction at SPEAR, CESR, PETRA and PEP are discussed. They are sufficiently similar that a simple prescription can be formulated to describe the behavior of the luminosity as a function of current including the peak values. With this prescription the interpretation of various methods of increasing the luminosity, such as the reduction of the vertical betatron fu...
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