One of the major challenges facing the proposed highenergy linear ee colliders is the preservation of the extremely small vertical emittance from the damping rings to the interaction point (IP). This emittance must be transported through bunch compression sections, the main linac and finally through the beam delivery system to the IP. Historically, the beam dynamics issues of each subsystem hav...

The CEBAF recirculator at Jefferson Lab includes two linear accelerators, each 200 meters in length. Due to varying betatron phase advance for different recirculation passes, misalignment, and other steering effects, orbit correction in the CEBAF linacs presents a complicated problem defying pass-by-pass solutions. Utilization of information from the beam position measurements at all recirculat...

We describe the results of a series of simulation studies of beam-based alignment of the NLC main linacs using the program LIAR. Three algorithms for alignment of quadrupoles and girders are considered: the algorithm used in the ZDR, the ZDR algorithm combined with a post-alignment MICADO operation, and an algorithm which requires no steering dipoles but requires twice as many alignment segment...

Most failures of linear electron accelerators (LEA) are caused by malfunctions in the systems of RF-feeding, modulators and clystrons. And a great part of malfunctions lead to the increased dispersion of amplitudes of output signals of the system. In this paper we consider the algorithms of failure prediction based on some indication functions and the use of these algorithms in the LEA control ...

The need to produce intense X-rays in the Energy Recovery Linear Accelerator requires shorter and narrower electron beams than the Cornell Electron Storage Ring can provide. Such electron beams will demand highly accurate beam position monitors (BPMs) to enable operators to control the beam. To prepare for new BPMs, a test stand has been built to conduct experiments on new algorithms and design...

abstract. the main contribution of the current paper is to propose a new effective numerical method for solving the first-order linear matrix differential equations. properties of the legendre basis operational matrix of integration together with a collocation method are applied to reduce the problem to a coupled linear matrix equations. afterwards, an iterative algorithm is examined for solvin...