Impedance Measurement Setup for Higher-Order Mode Studies in NLC Accelerator Structures with the Wire Method

Abstract

Dipole modes are the main cause of transverse emittance dilution in the Japanese Linear Collider / Next Linear Collider (JLC/NLC). A diagnostic setup has been built in order to investigate them. The method is based on using a coaxial wire to excite and measure electromagnetic modes of accelerating structures. This method can offer a more efficient and less expensive procedure than the ASSET facility. Initial measurements have been made and are presented in this paper.

3 pages Presented at Linac 2002, Gyeongju, Korea, Aug. 19-23, 2002