Full chip statistical fault injection has been performed on a hardware emulated POWER6 platform. These results were validated against proton beam injection results. The fault isolation, error recovery and error logging capabilities of the POWER6 enabled measurement of the architectural derating factors. The proportion of errors as well as derating factors matched well between the simulated and ...

Emittance growth due to the non-linear beam-beam interaction is a major concern at all hadron colliders. The tunes (i.e. the rotation numbers of the transverse betatron oscillations) are always chosen to avoid low order resonances and the overlap of high order resonances does not create chaotic regions large enough to lead to significant amplitude growth. The dynamics are qualitatively differen...

This paper presents a finite element formulation for the dynamics analysis of the steady and transient states of a nonlinear piezoelectric beam. A piezoelectric beam with damping is studied under harmonic excitation. A numerical method is used for this analysis. In the paper, the central difference formula of four order is used and compared with the central difference formula of two order in th...

used to describe the new local nonrelativistic Maxwellian distribution for each cell. The entire process is then reAn extension of the beam scheme of Sanders and Prendergast (Astrophys. J. 188, 489, 1974) for the Newtonian gas dynamics to peated for the next time step. The choice of the size of relativistic gas dynamics is presented. It is found that the relativistic the time step is dictacted ...

The measurement of the mass of the W boson requires an accurate determination ofthe beam energy and a good understanding of the accelerator to guarantee stable running withhigh luminosities at high beam energies. In this thesis a reliable method was developed tomeasure the horizontal detuning with amplitude which turned out to be an important stabilitycriterion for the high ener...

The theoretical description of the beam-beam interaction presented here takes into account all the important features of the beam-beam phenomenon: the nonlinear beam-beam force and its dependence on both transverse coordinates, damping of the oscillations, presence of noise in the particle motion, in particular the quantum noise in its synchrotron radiation, actual machine functions, layout and...

Space-charge-induced emittance growth and halo generation could lead to unacceptably high beam loss in high intensity rings, such as the SNS [1]. In such accelerators, uncontrolled losses to the walls as small as one part in 10 would lead to activation, making maintenance difficult. For this reason it is essential to understand the effects of space charge on beam dynamics, and halo generation i...

It has been empirically observed in both experiments and particle-in-cell simulations that space-charge-dominated beams suffer strong growth in statistical phasespace area (degraded quality) and particle losses in alternating gradient quadrupole transport channels when the undepressed phase advance σ0 increases beyond about 85 per lattice period. Although this criterion has been used extensivel...

Title of Dissertation: TOMOGRAPHIC MEASUREMENT OF THE PHASE SPACE DISTRIBUTION OF A SPACE-CHARGE-DOMINATED BEAM Diktys Stratakis, Doctor of Philosophy, 2008 Dissertation Directed By: Professor & Chair, Patrick G. O’Shea Professor, Rami A. Kishek Department of Electrical and Computer Engineering Many applications of accelerators, such as free electron lasers, pulsed neutron sources, and heavy io...