If a low energy synchrotron is to be used as an injector for a 300 Bev machine, the problem may arise of synchronizing the two R.F. systems at transfer time in order that a bunch of protons in the injector may be transferred to a bucket in the main machine without loss of particles. A possible synchronization scheme is proposed and investigated here.

A three-dimensional computational model of an experimental rectangular combustion chamber was developed to explore the wall heat transfer of a GO2/GH2 shear coaxial single element injector. The CFD model allowed for the direct analysis of heat transfer effects due to flow dynamics—an analysis that would be very difficult using experimental studies alone. The use of a 3-D CFD model revealed heat...

DNA vaccines are potential tools for the induction of immune responses against both infectious disease and cancer. The dermal application of DNA vaccines is of particular interest since the epidermal and dermal layers of the skin are characterized by an abundance of antigen-presenting cells (APCs). The aim of our study was to compare tumor protection as obtained by two different methods of intr...

Vortex breakdown, observed in swirling flows, is an interesting physical phenomenon relevant to a wide range of engineering applications, including aerodynamics and combustion. The concept using plasma swirler control vortex breakdown was proposed tested this study. effect actuation on controlling the onset development captured by particle image velocimetry. Flowfield measurement results sugges...

Determining injector-producer relationships, i.e., to quantify the inter-well connectivity between injectors and producers in a reservoir, is a complex and non-stationary problem. In this paper, we present a neural-network-based sensitivity analysis approach to address this problem. To the best of our knowledge, sensitivity analysis has never been applied for identification of the injector-prod...

The design of an apparatus to measure the beam energy of an RFQ, based on multiple scattering of H ions in xenon gas, is described. The purpose of the apparatus is to confirm the mean energy and energy spread of the nominal 665 keV beam from the ISIS RFQ. This RFQ, after comprehensive testing, is intended to replace the existing Cockcroft-Walton pre-injector on the ISIS spallation neutron sourc...

The fast code HOMDYN has been recently developed, in the framework of the TTF (TESLA Test Facility) collaboration, in order to study the beam dynamics of linacs delivering high brightness beams as those needed for short wavelength FEL experiments. These linacs are typically driven by radio-frequency photo-injectors, where correlated time dependent space charge effects are of great relevance: th...

The work carried out in this thesis focuses on the interaction between fast ions and turbulence. The aim of the project is to explore this phenomenon and develop the numerical framework required for investigations on present day machines and predictions for burning plasmas. The analysis of the background plasma turbulence and the resulting fast ion diffusivities is carried out with the gyrokine...

Fractal injectors can be used to intensify liquid-phase processes. The flow field, vortex structure and turbulent mixing performance induced by fractal with three different dimensions (D = 2, 2.58 3) are investigated. CFD simulations, using a renormalization group (RNG) k-ε turbulence model, validated particle image velocimetry (PIV) measurements. formation mechanism of the vortices studied. Bo...