نتایج جستجو برای: collimation
تعداد نتایج: 1626 فیلتر نتایج به سال:
A highly effective collimation scheme is required in the LHC to limit heating of the vacuum chamber and superconducting magnets by protons either uncaptured at injection or scattered by non-linear phenomena. The proposed system would consist of one set of primary collimators followed by three sets of secondary collimators downstream to clean up protons scattered from the primaries. Each set of ...
Experiments were performed to investigate the propagation of a high intensity (I approximately 10(21) W cm(-2)) laser in foam targets with densities ranging from 0.9n(c) to 30n(c). Proton acceleration was used to diagnose the interaction. An improvement in proton beam energy and efficiency is observed for the lowest density foam (n(e)=0.9n(c)), compared to higher density foams. Simulations show...
Introduction. The aim of this study was to discuss the radiation doses associated with plain radiographs, cone-beam computed tomography (CBCT), and conventional computed tomography (CT) in dentistry, with a special focus on orthodontics. Methods. A systematic search for articles was realized by MEDLINE from 1997-March 2011. Results. Twenty-seven articles met the established criteria. The data o...
Several schemes for checking collimation of a light beam based on the self-imaging (Talbot effect) combined with the moire technique have been described. When a grating is illuminated by a collimated beam of monochromatic light, exact self-images of the grating are formed at certain welldefined planes perpendicular to the direction of the beam. The moire pattern is observed by placing an identi...
MAD-MARS Beam-Line Builder (MMBLB) is a tool that helps MARS15 build models of accelerator lattices and beam lines using the MAD-generated optics descriptions. This mode is especially powerful in beam loss, collimation, backgrounds and shielding studies at the existing and new accelerators and beam transport lines. Many applications works using this tool have been performed such as Main Injecto...
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