TY  - CONF
AU  - Telawane, S.
AU  - Schöps, A.
AU  - Neumann, Paul
AU  - Ramm, T.
AU  - Tischer, M.
AU  - Vagin, P.
TI  - A Laser Heater Undulator for FLASH2020+
JO  - Journal of physics / Conference Series
VL  - 2380
IS  - 1
SN  - 1742-6588
CY  - Bristol
PB  - IOP Publ.
M1  - PUBDB-2023-01311
SP  - 012028
PY  - 2023
AB  - Space charge induced micro bunch instabilities, amplified in cascadedbunch compression stages, spoil the phase space of compressed bunches and leadto unstable seeding. To “heat” up the bunch with an external laser and induce anuncorrelated energy spread to suppresses the micro bunching instabilities, a shortundulator will be installed in front of the first compression chicane. The undulator hasa planar hybrid magnet structure with 43 mm period length, 11 full periods, 22 mmminimum gap and a deflection parameter K of 1.52 (K = (eBλ<sub>u</sub>) / (2πm<sub>ec</sub>), withB - max. magnetic field amplitude, λ<sub>u</sub> - period length) to match the 534 nm laserwavelength at 146 MeV beam energy. The paper describes the undulator’s compactdesign, its control system and results of magnetic measurements and tuning.
T2  - 14th International Conference on Synchrotron Radiation Instrumentation
CY  - 28 Mar 2022 - 1 Apr 2022, Hamburg (Germany)
Y2  - 28 Mar 2022 - 1 Apr 2022
M2  - Hamburg, Germany
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
DO  - DOI:10.1088/1742-6596/2380/1/012028
UR  - https://bib-pubdb1.desy.de/record/580554
ER  -