Skip to Main content Skip to Navigation
Theses

Etude d'une cavite accélératrice supraconductrice Spoke pour les accélérateurs de protons de forte intensité

Abstract : Since a few years, a lot of projects (especially dedicated to transmutation, radioactive beams production, spallation neutron sources or neutrinos factories) are based on high power proton linear accelerators. It has been demonstrated, thanks to their excellent RF performances, that superconducting elliptical cavities represent the best technological solution for the high energy part of these linacs (proton energy from typically 100 MeV). On the contrary, between 5 and 100 MeV, nothing is clearly settled and intensive studies on low-beta cavities are under progress. The main objective of this thesis deals with the study of a new low-beta cavity, called "spoke", which could be used in the low energy part of European XADS and EURISOL accelerators projects. A complete study of a beta 0.35 spoke cavity has been done: from its electromagnetic and mechanical optimization to warm and, above all, cold experimental tests: an accelerating field of 12.2 MV/m has been reached at T=4.2 K, that is to say one of the best value among the spoke cavities performances in the world. It has been shown that the specific ratio of a third, between the spoke bar diameter and the cavity length, led to optimize the surface electromagnetic fields. Moreover, spoke cavities can be used without any trouble, in the low energy part, due to their good rigidity. The experimental measurements performed on the cavity (which was produced by the CERCA company) have confirmed the theoretical calculations, especially, concerning the expected frequency and mechanical behavior. Another study, performed on elliptical cavities, gave an explanation of the discrepancies between the measured and calculated frequencies thanks to a precise 3D geometrical control. Keywords : spoke cavity, superconductivity, proton linear accelerator, geometrical control
Complete list of metadatas

Cited literature [79 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00005985
Contributor : Admin Base Des Publications de l'In2p3 <>
Submitted on : Wednesday, April 28, 2004 - 11:12:47 AM
Last modification on : Wednesday, October 14, 2020 - 3:57:07 AM
Long-term archiving on: : Friday, April 2, 2010 - 8:12:50 PM

Identifiers

  • HAL Id : tel-00005985, version 1

Collections

Citation

Guillaume Olry. Etude d'une cavite accélératrice supraconductrice Spoke pour les accélérateurs de protons de forte intensité. Physique Nucléaire Théorique [nucl-th]. Université Paris-Diderot - Paris VII, 2004. Français. ⟨tel-00005985⟩

Share

Metrics

Record views

636

Files downloads

2118