August 27, 2017 to September 1, 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Design and characterisation of tunable high gradient permanent magnets quadrupoles

Aug 29, 2017, 1:15 PM
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m A2 - Resistive Accelerator Magnets Tue-Af-Po2.02


Fabrice Marteau (Synchrotron SOLEIL)


The design and the characterization of high gradient permanent magnet (PM) quadrupoles, so-called”QUAPEVA” with variable strength are presented. The quadrupole structure is composed of a Halbach ring in the centre and four PM cylinders around. The central magnet provides a fixed gradient of 160 T/m. The four PM cylinders are used to achieve the gradient tuning range from 100 T/m to 200 T/m thanks to their rotation around their axis. Each tuning magnet can be controlled independently, enabling tuning the gradient without field asymmetry and without magnet centre variation. Seven quadrupoles has been built with different lengths in order to fulfil the integrated gradient requirements (from 3T to 21T). They are now used to focus electrons generated by laser plasma acceleration for a free electron laser application on the COXINEL ERC Advanced Grant Experiment. For this application, high gradient quadrupoles are required due to the large divergence of the electron beam. Furthermore a wide gradient tuning necessary in order to run at different energies can only be achieved with PM technology.

Submitters Country France

Primary author

Fabrice Marteau (Synchrotron SOLEIL)


Mr Thomas Andre (Synchrotron SOLEIL) Dr Chamseddine Benabderrahmane (European Synchrotron Radiation Facility) Mr Fréderic Blache (Synchrotron SOLEIL) Olivier Cosson (SIGMAPHI) Marie-Emmanuelle Couprie (Synchrotron SOLEIL) Frederick Forest (SIGMAPHI) Mr Amin Ghaith (Synchrotron SOLEIL) Jean Luc Lancelot (Sigmaphi) Mr Patrick Ngotta (synchrotron SOLEIL) Mr Mathieu Valleau (Synchrotron SOLEIL) Mr Jose Veteran (Synchrotron SOLEIL)

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