QUAPEVA: Variable High Gradient Permanent Magnet Quadrupole

Charles Kitegi (1) , Thomas André (1) , Chamseddine Benabderrahmane (2) , Joel Chavanne (2) , Olivier Cosson (3) , Marie-Emmanuelle Couprie (1) , Frederick Forest (3) , Amin Ghaith (1) , Jérôme Idam (1) , Petko Jivkov (3) , Jean-Luc Lancelot (3) , Gaël Le Bec (2) , Alexandre Loulergue (1) , Fabrice Marteau (1) , Patrick N'Gotta , Driss Oumbarek (1) , Mourad Sebdaoui (1) , Cynthia Vallerand (4) , Mathieu Valléau (1) , José Vétéran (1)

1 SSOLEIL - Synchrotron SOLEIL
2 ESRF - European Synchrotron Radiation Facility
3 SIGMAPHI
4 LAL - Laboratoire de l'Accélérateur Linéaire

We present the magnetic and the mechanical design of tunable high gradient permanent magnet (PM) quadrupoles. The tunable gradient of the so-called QUAPEVAS extends from 100T/m up to 200T/m. Seven of them with various lengths, ranging from 26mm up to 100mm, for different integrated quadrupole strengths were manufactured. The measured magnetic performance of these devices is also reported. These devices were successfully developed to transport laser plasma accelerated electron beam. Such applications have however less stringent multipole harmonic content constraints than diffraction limited Light sources. Trails for lowering the multipole harmonics will be discussed.

Mots clés: ion; quadrupole; laser; electron; multipole

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

Charles Kitegi, Thomas André, Chamseddine Benabderrahmane, Joel Chavanne, Olivier Cosson, et al.. QUAPEVA: Variable High Gradient Permanent Magnet Quadrupole. 60th ICFA Advanced Beam Dynamics Workshop on Future Light Sources, Mar 2018, Shanghai, China. pp.WEA2WD01, ⟨10.18429/JACoW-FLS2018-WEA2WD01⟩. ⟨hal-01861891⟩