# Abstracts

## XX International Linac Conference

## MOE05 (Poster)

**Presenter: **Jean-Francois Ostiguy (FNL)

** email: **ostiguy@fnal.gov

**Status: **Complete

**FullText: **
ps.gz
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**Eprint:** physics/0008157
# Optimized Wakefield Computations Using a Network
Model

Jean-Francois Ostiguy, King-Yuen Ng (Fermilab)

During the course of the last decade, there have been intensive efforts
to develop accelerating structures for a future Linear Collider. Normal conducting
structures typically rely on detuning of the dipole mode to suppress the long range
sum wakefield. An important problem is the efficient computation of this wakefield
and the ability to include small alignment and tuning errors. To that end, SLAC has
developped an RF circuit model with a demonstrated ability to reproduce
experimentally measured wakefields. The wakefield computation involves the repeated
solution of a deterministic system of equations over a range of frequencies. By
taking maximum advantage of the sparsity of the equations, we have achieved
significant performance improvements. These improvements make it practical to
consider simulations involving an entire linac ($\sim 10^3$ structures). One might
also consider assessing, in real time, the impact of fabrication errors on the
wakefield as an integral part of quality control. ,

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