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RIS citation export for THPOW039: Measurements of the Lattice Modifications for the Cryogenic Undulator CPMU17

AU - Bahrdt, J.
AU - Engel, D.B.
AU - Frentrup, W.
AU - Goslawski, P.
AU - Kuske, P.
AU - Müller, R.
AU - Ries, M.
AU - Ruprecht, M.
AU - Schälicke, A.
ED - Petit-Jean-Genaz, Christine
ED - Kim, Dong Eon
ED - Kim, Kyung Sook
ED - Ko, In Soo
ED - Schaa, Volker RW
TI - Measurements of the Lattice Modifications for the Cryogenic Undulator CPMU17
J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016
C1 - Busan, Korea
T2 - International Particle Accelerator Conference
T3 - 7
LA - english
AB - A 2 mrad-canted double undulator system is in preparation as the wide energy range light source for the Energy Material in-situ Laboratory EMIL at the HZB storage ring BESSY II. The cryogenic undulator CPMU-17 is the hard X-ray device of the double undulator system. The soft X-ray undulator UE-48 is of the APPLE II type. It was installed and commissioned a few months ago, whereas the CPMU-17 is under fabrication. The CPMU-17 will employ a minimum magnetic gap of 5.5mm. Including a CuNi-foil for RF-shielding and geometric tolerances the free aperture is planned to be 5.0 mm. The BESSY II lattice has been modified locally in order to cope with the small gap device. The adapted betatron functions with a shifted vertical beam waist were measured and fitted with LOCO. The new optics agrees with the predicted performance. The free aperture at the installation place of the CPMU-17 was measured with four vertical scrapers. It is compatible with the projected minimum undulator gap. Finally, the measured injection efficiency with the new EMIL optics switched on is compatible with top-up operation (injection efficiency ≥ 90 %).
CP - Geneva, Switzerland
SP - 4031
EP - 4034
KW - undulator
KW - betatron
KW - optics
KW - quadrupole
KW - storage-ring
DA - 2016/06
PY - 2016
SN - 978-3-95450-147-2
DO - 10.18429/JACoW-IPAC2016-THPOW039
UR - http://jacow.org/ipac2016/papers/thpow039.pdf
ER -