Pulsed power technology has been applied in particle accelerators and storage rings for over four decades. It is most commonly used in injection, extraction, beam manipulation, source, and focusing systems. These systems belong to the class of repetitive pulsed power. In this presentation, we review and discuss the history, present status, and future challenge of pulsed power applications in high intensity proton accelerators and storage rings.

Large accelerator main magnet system consists of hundreds, even thousands, of dipole magnets. They are linked together under selected configurations to provide highly uniform dipole fields when powered. Distributed capacitance, insulation resistance, coil resistance, magnet inductance, and coupling inductance of upper and lower pancakes make each magnet a complex network. When all dipole magnets are chained together in a circle, they become a coupled pair of very high order complex ladder networks. In this study, a network of more than thousand inductive, capacitive or resistive elements are used to model an actual system. The circuit is a large-scale network. Its equivalent polynomial form has several hundred degrees. Analysis of this high order circuit and simulation of the response of any or all components is often computationally infeasible. We present methods to use frequency decomposition approach to effectively simulate and analyze magnet configuration and power supply topologies.

current and field. There are two power supply systems, A main magnet chain forms a pair of~ansmission lines. each with two banks. They feed magnet chain in two Pulse-reflection-caused voltage and current differentiation places in push-pull fashion. throughout the magnet chain can have adverse effect on main magnet field quality. This effect is associated with MAGNET PARAMETERS AND -.magnet system configuration, coupling efficiency, and UNCOUPLED MAGNET MODEL parasitic parameters. A better understanding of thisWe use LHC to denote the inductance of a chain of 120 phenomenon us in new design and existing half magnet. Its measured equivalent inductance is 760 system upgrade. In this paper, we exam the transmission mH. Therefore, the half-cell magnet inductance, L, , is line effect due to different input hnctions as well as configuration, coupling, and other parameters.6.33 mH. Similarly, the measured magnet coil resistance is 270

Brookhaven Science Associates, LLC for the United States Department of Energy under Contract No. DE-AC02-98CH10886 This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author.

We have recently developed a simplified model and a set of simple formulas for inductive voltage adder design. This model reveals the relationship of output waveform parameters and hardware designs. A computer simulation has demonstrated that parameter estimation based on this approach is accurate as compared to an actual circuit. This approach can be used in early stages of project development to assist feasibility study, geometry selection in engineering design, and parameter selection of critical components. In this paper, we give the deduction of a simplified model. Among the estimation forniulas we present are those for pulse rise time, system impedance, and number of stages. Examples are used to illustrate the advantage of this approach. This approach is also applicable to induction LINAC design.Its corresponding simplified model derived in [2] is given in Figure 2.