نتایج جستجو برای: section beam
تعداد نتایج: 266420 فیلتر نتایج به سال:
We adopt the Echo-Enabled Harmonic Generation (EEHG) scheme proposed by D. Xiang to design a device to generate intense narrow-band THz radiation based on the Tsinghua Thomson scattering X-ray (TTX) electron beam [1]. In this scheme the 50 MeV electron beam is firstly energy-modulated by two lasers with wavelengths of 800nm and 1560nm respectively. Then the modulated electron beam is sent into ...
Connections with Reduced Beam Section (RBS) have been investigated in the last 20 years both from an analytical point of view and from an experimental point of view. Several experimental tests demonstrated that RBS connections designed according to themost modern seismic codes are able to obtain the desired goal: the protection of the connection due to the yielding of the adjacent RBS. But in a...
New composite reinforced concrete beams, in which component is connected to steel T-section, are proposed. The stirrups of the beam were utilized as shear connectors by passing them through drilled holes web T-section. Experimental test and numerical analysis conducted determine behaviour such beams when subjected combined shear, torsion, bending stresses. Full scale one conventional curved pla...
We propose to use the High Momentum Spectrometer of Hall C combined with a PbWO4 electromagnetic calorimeter in order to perform high precision measurements of the Deeply Virtual Compton Scattering (DVCS) cross section. A wide range of kinematics accessible with an 11 GeV electron beam off an unpolarized proton target will be covered. The azimuthal, energy and helicity dependences of the cross ...
Based on the small deflection beam theory, bending equation with axial tension of suspended pipe partially buried in the linear elastic soil is established. And the corresponding boundary conditions are given according to the stress and deformation characteristics of suspended section and buried section. Then deflection equation for the suspended section is deduced. Afterwards, the stress and c...
We report on the production of a continuous, slow, and cold beam of Rb atoms with an extremely high flux of 3.2 1012 atoms/s, a transverse temperature of 3 mK, and a longitudinal temperature of 90 mK. We describe the apparatus created to generate the atom beam. Hot atoms are emitted from a rubidium candlestick atomic beam source and transversely cooled and collimated by a 20 cm long atomic coll...
The Accelerator Production of Tritium (APT) facility [1,2] is based on a linac which incorporates both normalconducting and superconducting RF technology and accelerates a 100-mA cw proton beam to an energy of 1030 MeV or higher, depending on the desired production rate. Commissioning plans to achieve full power operation with minimum beam-induced activation of components have been evolving [3]...
Imaging , weakly - perturbing diagnostics of an x - ray beam at the LCLS facility ( physics issues )
Several approaches to the imaging of the x-ray beam cross-section in the LCLS facility have been proposed: deflecting a small part of the beam by a thin mirror; partial scattering from a thin, high-density gas jet, partial scattering from a thin solid foil. The general feature of all these diagnostics is that the imaging does not introduce significant perturbations to the beam. A set of design ...
The widespread brittle failure of welded beam-to-column connections caused by the 1994 Northridge and 1995 Kobe earthquakes highlighted the need for retrofitting measures effective in reducing the strength demand imposed on connections under cyclic loading. Researchers presented the reduced beam section (RBS) as a viable option to create a weak zone away from the connection, aiding the preventi...
Beams with high brilliances are required for many applications e.g. for exotic and radioactive beam application. One way of reducing the necessary acceptance resp. increasing the transmission of accelerators is beam cooling by the statistical collisions with a buffer gas and a decreasing of the emittance in a short transport section in front of the accelerator. Our experimental setup is a combi...
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