Tunable High-Gradient Quadrupoles for a Laser-Plasma Acceleration-Based FEL

Ghaith, Amin; Benabderrahmane, Chamseddine; Blache, Frederic; Cosson, Olivier; Couprie, Marie-Emmanuelle; Forest, Frederick; Jivkov, Petko; Kitegi, Charles; Lancelot, Jean-Luc; Marteau, Fabrice; N'gotta, Patrick; Valléau, Mathieu; Vétéran, José

doi:10.18429/JACoW-FEL2017-WEP064

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RIS citation export for WEP064: Tunable High-Gradient Quadrupoles for a Laser-Plasma Acceleration-Based FEL

TY - CONF
AU - Ghaith, A.
AU - Benabderrahmane, C.
AU - Blache, F.
AU - Cosson, O.
AU - Couprie, M.-E.
AU - Forest, F.
AU - Jivkov, P.
AU - Kitegi, C.A.
AU - Lancelot, J.L.
AU - Marteau, F.
AU - N'gotta, P.
AU - Valléau, M.
AU - Vétéran, J.
ED - Bishofberger, Kip:Carlsten, Bruce (LANL, Los Alamos, NM, USA)[ORCID:0000-0001-5619-907X]
ED - Schaa, Volker RW
TI - Tunable High-Gradient Quadrupoles for a Laser-Plasma Acceleration-Based FEL
J2 - Proc. of FEL2017, Santa Fe, NM, USA, August 20-25, 2017
C1 - Santa Fe, NM, USA
T2 - International Free Electron Laser Conference
T3 - 38
LA - english
AB - The magnetic design and characterization of tunable high gradient permanent magnet based quadrupole, are presented. To achieve a high gradient field with a compact structure, permanent magnets are chosen rather than usual electro-magnets due to their small aperture. The quadrupole structure consists of two quadrupoles superimposed capable of generating a gradient of 210 T/m. The first quadrupole is composed of permanent magnets following a Halbach configuration shaped as a ring attaining a constant gradient of 160T/m, and the second of four permanent magnet cylinders surrounding the ring and capable of rotating around their axis to achieve a gradient tunability of ±50 T/m. Each tuning magnet is connected to a motor and is controlled independently, enabling the gradient to be tuned with a rather good magnetic center stability (±20 μm) and without any field asymmetry. Seven quadrupoles have been built with different magnetic lengths in order to fulfil the integrated gradient required. A set of QUAPEVA triplet are now in use, to focus a high divergent electron beam with large energy spread generated by a laser plasma acceleration source for a free electron laser application.
PB - JACoW
CP - Geneva, Switzerland
SP - 550
EP - 553
KW - ion
KW - quadrupole
KW - electron
KW - laser
KW - permanent-magnet
DA - 2018/02
PY - 2018
SN - 978-3-95450-179-3
DO - 10.18429/JACoW-FEL2017-WEP064
UR - http://jacow.org/fel2017/papers/wep064.pdf
ER -