Bench measurements nowadays represent an important tool to estimate the coupling impedance of any particle accelerator device. The well-known technique based on the coaxial wire method allows to excite in the device under test a field similar to the one generated by an ultra-relativistic point charge. We discuss the basics of the coaxial wire method and review the formulae widely used to convert measured scattering parameters to longitudinal and transverse impedance data. We review, as well, bead-pull technique used in the design, construction and tuning of multi-cell accelerating structures. We discuss typical measurement examples of interest for the CERN Large Hadron Collider as well as other state of the art particle accelerator.
RF coupling impedance measurements for particle accelerator devices / Mostacci, Andrea; D., Alesini; Biancacci, Nicolò; F., Caspers; Ficcadenti, Luca; J., Kuczerowski; Migliorati, Mauro; Palumbo, Luigi; B., Salvant; B., Spataro. - 1:(2014), pp. 80-85. (Intervento presentato al convegno 20th IMEKO TC4 Symposium on Measurements of Electrical Quantities: Research on Electrical and Electronic Measurement for the Economic Upturn, Together with 18th TC4 International Workshop on ADC and DCA Modeling and Testing, IWADC 2014 tenutosi a Benevento, Italy nel 15 September 2014 through 17 September 2014).
RF coupling impedance measurements for particle accelerator devices
MOSTACCI, Andrea;BIANCACCI, NICOLÒ;FICCADENTI, LUCA;MIGLIORATI, Mauro;PALUMBO, Luigi;
2014
Abstract
Bench measurements nowadays represent an important tool to estimate the coupling impedance of any particle accelerator device. The well-known technique based on the coaxial wire method allows to excite in the device under test a field similar to the one generated by an ultra-relativistic point charge. We discuss the basics of the coaxial wire method and review the formulae widely used to convert measured scattering parameters to longitudinal and transverse impedance data. We review, as well, bead-pull technique used in the design, construction and tuning of multi-cell accelerating structures. We discuss typical measurement examples of interest for the CERN Large Hadron Collider as well as other state of the art particle accelerator.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
