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]...

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 ...

Whilst there has been research about reduced web section beams; RWS, their seismic behaviour when they are overlaid by slabs is not well understood. This study addresses this assessing a high-definition finite element representation of non-seismically detailed RWS connections with slabs. The composite action investigated, focusing on effects the size and location openings. These can reach 4% in...

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...

the finite element method is employed for the flexural-torsional linear buckling analysis of beams of arbitrarily shaped composite cross-section taking into account generalized warping (shear lag effects due to both flexure and torsion). the contacting materials, that constitute the composite cross section, may include a finite number of holes. a compressive axial load is applied to the beam. the...

Longitudinal compression of a velocity-tailored, intense neutralized beam at 300 keV, 25 mA has been demonstrated. The compression takes place in a 1-2 m drift section filled with plasma to provide space-charge neutralization. An induction cell produces a head-to-tail velocity ramp that longitudinally compresses the neutralized beam, enhancing the beam peak current by a factor of 50 and produci...

The RHYTMME project (Risques HYdro-météorologiques en Territoires de Montagnes et MEditerranéens) was developed in order to establish a platform of services allowing a better management of hydrometeorological risks in the French southern Alps, which are prone to intense precipitation events and flash floods. In the frame of the RHYTMME Project, Météo France is deploying a dense network of 4 pol...

This Study represents compatibility on Cold formed steel in I-Section beams and C-section with variable length parameters was 1000mm, 1500mm, 2000 mm under simply supported end condition subjected to uniformly distributed loading. The is of shell type Numerical simulation carried out using the Software ABAQUS. For validation series studies have been numerical model different parameters, such as...

It has been known for some time that considerable changes in the physical properties of thin sections may be induced by irradiation in the electron microscope. There have been few systematic studies, however, of the nature of these changes, particularly when the sections contain biological material. Cosslett (1961) showed that thin sections of several embedding media commonly used in the electr...

Clouds of low energy electrons in the vacuum beam pipes of accelerators of positively charged particle beams present a serious limitation for operation at high currents. Furthermore, it is difficult to probe their density over substantial lengths of the beam pipe. We have developed a novel technique to directly measure the electron cloud density via the phase shift induced in a TE wave transmit...