| Paper | Title | Page |
|---|---|---|
| TUPD080 | Study of High-frequency Impedance of Small-angle Tapers and Collimators | 2102 |
|
||
|
Collimators and other similar accelerator structures usually include small-angle tapering to lower the wakefields generated by the beam. While the low-frequency impedance is well described by Yokoya's formula (for axisymmetric geometry), much less is known about the behavior of the impedance in the high frequency limit. In this paper we develop an analytical approach to the high-frequency regime for round collimators and tapers. Our analytical results are compared with computer simulations using the code ECHO. |