TY  - CONF
AU  - Tischer, Markus
AU  - Bienert, Hilmar
AU  - Götze, Kathrin
AU  - Neumann, Paul
AU  - Ramm, Torsten
AU  - Schoeps, Andreas
AU  - Talkovski, Peter
AU  - Telawane, Sayali
AU  - Vagin, Pavel
TI  - Construction and commissioning of an APPLE-III afterburner undulator as a prototype for radiators in the new seeding line of FLASH2020+
JO  - Journal of physics / Conference Series
VL  - 3010
IS  - 1
SN  - 1742-6588
CY  - Bristol
PB  - IOP Publ.
M1  - PUBDB-2024-07181
SP  - 012045
PY  - 2025
AB  - An APPLE-III undulator with 17.5 mm period length operating at aminimum magnetic gap of 8 mm was installed downstream of the FLASH2 SASEundulators. This device serves as an afterburner and was designed to providearbitrarily (also circularly) polarized light at the 3rd harmonic of the FLASH2radiation with a wavelength of 1.33 nm to 1.77 nm (890-700eV), covering theabsorption L-edges of the magnetic 3d elements. After characterization of thedifferent polarization modes at different wavelengths in a first commissioningphase, first user experiments have been conducted.Here, we report on our experiences with the mechanical and magnetic assemblyof the APPLE-III UE17 as well as on magnetic measurements and tuning oftrajectories and phase errors at the different polarization states.
T2  - 15th International Conference on Synchrotron Radiation Instrumentation
CY  - 26 Aug 2024 - 30 Aug 2024, Hamburg (Germany)
Y2  - 26 Aug 2024 - 30 Aug 2024
M2  - Hamburg, Germany
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
DO  - DOI:10.1088/1742-6596/3010/1/012045
UR  - https://bib-pubdb1.desy.de/record/618828
ER  -