Building the impedance model of a real machine

Benoit Salvant , David Amorim (1) , Sergey Antipov , Sergey Arsenyev , Mario Beck , Nicolo Biancacci , Oliver Brüning , Jose Enrique Campelo , Emanuela Carideo , Fritz Caspers , Titus Dalascu , Aaron Farricker , Alexej Grudiev , Thomas Kaltenbacher , Eirini Koukovini-Platia , Patrick Kramer , Alexandre Lasheen , Mauro Migliorati , Nicolas Mounet , Elias Métral , Ryutaro Nagaoka (2) , Nasrin Nasr Esfahani , Serena Persichelli , Branko Popovic , Tatiana Rijoff , Giovanni Rumolo , Elena Shaposhnikova , Victor Smaluk , Bruno Spataro , Vittorio Vaccaro , Christine Vollinger , Na Wang , Simon White (3) , Carlo Zannini , Bruno Zotter

1 INPG - Institut National Polytechnique de Grenoble
2 SSOLEIL - Synchrotron SOLEIL
3 ESRF - European Synchrotron Radiation Facility

A reliable impedance model of a particle accelerator can be built by combining the beam coupling impedances of all the components. This is a necessary step to be able to evaluate the machine performance limitations, identify the main contributors in case an impedance reduction is required, and study the interaction with other mechanisms such as optics nonlinearities, transverse damper, noise, space charge, electron cloud, beam-beam (in a collider). The main phases to create a realistic impedance model, and verify it experimentally, will be reviewed, highlighting the main challenges. Some examples will be presented revealing the levels of precision of machine impedance models that have been achieved.

Mots clés: impedance; simulation; wakefield; coupling; cavity

Domaines: Physique des accélérateurs [physics.acc-ph]

Benoit Salvant, David Amorim, Sergey Antipov, Sergey Arsenyev, Mario Beck, et al.. Building the impedance model of a real machine. 10th International Particle Accelerator Conference, May 2019, Melbourne, Australia. pp.WEYPLS1, ⟨10.18429/JACoW-IPAC2019-WEYPLS1⟩. ⟨hal-02272671⟩