23-24 September 2020
Virtual Meeting via Zoom
Europe/Berlin timezone

LCLS-I undulator horizontal gradient modeling for THz@PITZ

24 Sep 2020, 10:35
Virtual Meeting via Zoom

Virtual Meeting via Zoom

Speed talk Beam Dynamics


Mikhail Krasilnikov (DESY Zeuthen)


The Photo Injector Test Facility at DESY in Zeuthen (PITZ) develops a prototype of an accelerator based THz source for pump-probe experiments at the European XFEL. For the proof-of-principle experiments an LCLS-I undulator will be installed in a second PITZ tunnel downstream of the accelerator. Two LCLS-I undulators (on loan from SLAC) have arrived at Hamburg in August 2019. The fields of the undulator L143-112000-26 have been re-measured at DESY Hamburg and are consistent with SLAC measurement. A model for 3D field reconstruction based on the undulator magnetic measurements has been developed. This includes also a horizontal gradient of the vertical undulator field. Beam tracking has revealed that the transverse gradient will lead to an off-axis trajectory in the horizontal plane. This offset has to be corrected by steering coils which design is presented as well.

Primary author

Mikhail Krasilnikov (DESY Zeuthen)


Anusorn Lueangaramwong (DESY, Zeuthen) Markus Tischer (HASYLAB / DESY) Pavel Vagin (DESY, Hamburg) Dr Xiangkun LI (DESY Zeuthen)

Presentation Materials