| Paper | Title | Page |
|---|
| WEP79 | Scattering matrix calculation of higher order modes and sensitivity to cavity fabrication errors for the ILC superconducting cavities | 695 |
| | - I. Shinton, R. M. Jones
University of Manchester/Cockcroft Institute
| |
| | A cascaded scattering matrix approach is used to
determine the eigenmodes and driven modes in the main
linac cavities of the ILC. This approach is used to
compute higher order e.m. modes in the baseline
configuration, and high gradient alternative
configurations. We present results on three cavity
designs: TESLA, Cornell University's re-entrant and,
KEK's "Ichiro". This approach allows realistic
experimental errors to be incorporated in the studies in an
efficient manner and allows several cavities to be
modelled. Implications of indentations in the cavity on the
modal properties of the structure are presented. | |
| WEP80 | Simulations of transverse higher order deflecting modes in the main linacs of ILC | 700 |
| | - C. J. Glasman, R. M. Jones, I. Shinton
The University of Manchester/Cockcroft Institute of Science and Technology - G. Burt
Lancaster University/Cockcroft Institute of Science and Technology
| |
| | We investigate the electromagnetic field excited by a
train of multiple bunches in the main superconducting
linacs of the International Linear Collider (ILC). These
e.m. fields are represented as a wake-field. Detailed
simulations are made for modes constituting the longrange
wake-field in new high gradient cavities. In
particular, we focus our study on the transverse deflecting
modes in high gradient cavity designs known as "Ichiro",
in which the central cells have iris radius of 30 mm.
These cavities have a reduced iris compare to the TESLA
design and will have more intense wake-fields. Several
software packages solving the electromagnetic field,
employing different algorithms have been used to model
the cavity. The performance of these codes is compared. | |