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In order to obtain high luminosity and energy efficiency in future linear col-liders, it is desirable to accelerate a train of closely spaced bunches on each rf pulse of the machine. There can be severe multibunch beam break-up in such a collider unless some means of strongly suppressing the transverse wakefield is incorporated into the design of the(More)
An accelerating structure designed as described previously is nearing completion. An equivalent circuit analysis, elaborated to take account of both the lower two dipole bands and the nonuniform properties of the damping manifolds, has been carried out. The equivalent circuit has nine parameters per cell, determined by matching the dispersion curves of the(More)
A high-power low-loss mode transducer design has been proposed to adapt the output of the X-Band klystron, WR.90 rectangular waveguide, to the input of the pulse compression system, SLED II, which utilizes overmoded circular waveguides operating in the low-loss TEol mode. This device is much more compact than the conventional Marie' type mode converters.(More)
As a joint effort in the JLC/NLC research program, we have developed a new type of damped detuned accelerator structure with optimized round-shaped cavities (RDDS). This paper discusses some important R&D aspects of the first structure in this series (RDDS1). The design aspects covered are the cell design with sub-MHz precision, HOM detuning, coupling and(More)
_ .a.. A new method is proposed for computer determination of the resonant frequency and Qezt of a waveguide loaded cavity which, in principle, requires only a single run of a computer program such as MAFIA or ARGUS. It is closely related to the method of Kroll and Yu but makes use of the fact that these programs yield stored energy and field strength(More)
The equivalent circuit representation of the dipole modes of the SLAC damped detuned structure (DDS) which is being fabricated at SLAC [1] has been analyzed by three different methods. The first two [1] are based upon a modal analysis: in the first, damped modes are found by a first order perturbation in the cell to damping manifold coupling strength; while(More)
We present numerical procedures for analyzing the properties of periodic structures and associated couplers based upon time domain simulation. Simple post processing procedures are given for determining Brillouin diagrams and complex field distributions of the traveling wave solutions, and the reflection coefficient of the traveling waves by the input and(More)