Design of the 15 GHz BPM test bench for the CLIC test facility to perform precise stretched-wire RF measurements
Silvia Zorzetti1,2, Luca Fanucci2, Natalia Galindo Muñoz1 and Manfred Wendt1
1 CERN, 1217 Meyrin, Geneva, Switzerland
2 Universitá di Pisa, 56126 Pisa PI, Italy
Silvia Zorzetti et al 2015 Meas. Sci. Technol. 26 094005. doi:10.1088/0957-0233/26/9/094005
Received 12 January 2015, accepted for publication 10 June 2015. Published 29 July 2015.
© 2015 IOP Publishing Ltd
Abstract
The Compact Linear Collider (CLIC) requires a low emittance beam transport and preservation, thus a precise control of the beam orbit along up to 50 km of the accelerator components in the sub-μm regime is required. Within the PACMAN3 (Particle Accelerator Components Metrology and Alignment to the Nanometer Scale) PhD training action a study with the objective of pre-aligning the electrical centre of a 15 GHz cavity beam position monitor (BPM) to the magnetic centre of the main beam quadrupole is initiated. Of particular importance is the design of a specific test bench to study the stretched-wire setup for the CLIC Test Facility (CTF3) BPM, focusing on the aspects of microwave signal excitation, transmission and impedance-matching, as well as the mechanical setup and reproducibility of the measurement method.
