Construction and Optimization of Cryogenic Undulators at SOLEIL

Valléau, Mathieu; Berteaud, Philippe; Briquez, Fabien; Brunelle, Pascale; Béchu, Nicolas; Couprie, Marie-Emmanuelle; Da Silva Castro, José; Dubuisson, Jean-Michel; Ghaith, Amin; Herbeaux, Christian; Idam, Jérôme; Kitegi, Charles; Lepage, Francois; Lestrade, Alain; Louvet, Marc; Marcouillé, Olivier; Marteau, Fabrice; Mary, Arnaud; Nadji, Amor; Nadolski, Laurent; Rommeluère, Patrick; Sebdaoui, Mourad; Somogyi, Andréa; Tavakoli, Keihan; Tilmont, Manuel; Weitkamp, Timm

doi:10.18429/JACoW-FLS2018-THP2WD01

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RIS citation export for THP2WD01: Construction and Optimization of Cryogenic Undulators at SOLEIL

TY - CONF
AU - Valléau, M.
AU - Berteaud, P.
AU - Briquez, F.
AU - Brunelle, P.
AU - Béchu, N.
AU - Couprie, M.-E.
AU - Da Silva Castro, J.
AU - Dubuisson, J.M.
AU - Ghaith, A.
AU - Herbeaux, C.
AU - Idam, J.
AU - Kitegi, C.A.
AU - Lepage, F.
AU - Lestrade, A.
AU - Louvet, M.
AU - Marcouillé, O.
AU - Marteau, F.
AU - Mary, A.
AU - Nadji, A.
AU - Nadolski, L.S.
AU - Rommeluère, P.
AU - Sebdaoui, M.
AU - Somogyi, A.
AU - Tavakoli, K.T.
AU - Tilmont, M.
AU - Weitkamp, T.
ED - Chin, Yong Ho
ED - Zhao, Zhentang
ED - Petit-Jean-Genaz, Christine
ED - Schaa, Volker RW
TI - Construction and Optimization of Cryogenic Undulators at SOLEIL
J2 - Proc. of FLS2018, Shanghai, China, 5-9 March 2018
C1 - Shanghai, China
T2 - ICFA Advanced Beam Dynamics Workshop
T3 - 60
LA - english
AB - With permanent magnets undulator operation at cryogenic temperature, the magnetic field and the coercivity can be enhanced, enabling shorter periods with high magnetic fields. The first full scale (2 m long, 18 mm period) hybrid cryogenic undulator [1] using PrFeB [2] magnets operating at 77 K was installed at SOLEIL in 2011. Photon spectra measurements, in good agreement with the ex-pectations from magnetic measurements, were used for precise alignment and taper optimization. The second and third 18 mm PrFeB cryogenic undulators, modified to a half-pole/magnet/half-pole structure, were optimized without any magnet or pole shimming after assembly but mechanical sortings and some geometrical corrections had been done before assembly. A systematic error on individual magnets on the third U18 was also compensated. In-situ measurement benches, including a Hall probe and a stretched wire to optimize the undulator field at room and cryogenic temperature are presented. An upgrade of these in-situ benches will be detailed with the fabrication of a 15 mm 3 m long PrFeB cryogenic undulator at SOLEIL.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 193
EP - 198
KW - ion
KW - undulator
KW - cryogenics
KW - vacuum
KW - electron
DA - 2018/06
PY - 2018
SN - 978-3-95450-206-6
DO - 10.18429/JACoW-FLS2018-THP2WD01
UR - http://jacow.org/fls2018/papers/thp2wd01.pdf
ER -