Contribution to a conference proceedings

PUBDB-2024-05498

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Automatic Electron Optics Compensation for FODO Lattices Affected by Undulator Focusing

Zemella, J.DESY* ; Vogt, M. (Corresponding author)DESY* ; Faatz, B.Extern* ; Chen, Z.Extern*XFEL.EU*

2024

Abstract: Within the FLASH 2020+ upgrade project of the FLASH facility in Hamburg, the original FLASH beamline (FLASH1) will be completely remodeled and equipped with variable gap APPLE-III undulators, capable of controlling the polarization state of the FEL radiation. In the course of enhancing the operability of FLASH, the influence of the variable undulator focusing in both planes will be compensated by an automatic correction algorithm.The aim is to maintain a stable optics while minimizing optical changes.In this article, we discuss the basic stability concepts of a ``FUDU'' (focusing quadrupole, undulator, defocusing quadrupole, undulator) lattice, and compare several analytical approximations and numerical approaches.

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Contributing Institute(s):

1. Maschinen Koordination FLASH (MFL)

Research Program(s):

1. 6G2 - FLASH (DESY) (POF4-6G2) (POF4-6G2)
2. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. Facility (machine) FLASH

Appears in the scientific report 2024

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