Experience with Short-Period, Small Gap Undulators at the SwissFEL Aramis Beamline
Year: 2019
Type: conference-paper
Abstract: The SwissFEL Aramis beamline provides hard X-ray FEL radiation down to 1 Angström with 5.8 GeV and short period, 15 mm, in-vacuum undulators (U15). To reach the maximum designed K-value of 1.8 the U15s have to be operated with vacuum gaps down to 3.0 mm. The thirteen-undulator modules are 4 m long and each of them is equipped with a pair of permanent magnet quadrupoles at the two ends, aligned magnetically to the undulator axis. Optical systems and dedicated photon diagnostics are used to check the alignment and improve the K-value calibration. In this talk the main steps of the undulator commissioning will be recalled and a systematic comparison between the magnetic results and the electron and photon based measurements will be reported to highlight achievements and open issues.
Source: OAR@UM (University of Malta)
Authors: Schmidt, Thomas, Aiba, Masamitsu, Alarcon, Arturo, Arrell, Christopher, Bettoni, Simona, Calvi, Marco, Cassar, Ariana, Ferrari, Eugenio, Follath, Rolf, Ganter, Romain, Hiller, Nicole, Juranič, Pavle, Kittel, Christoph, Löhl, Florian, Prat, Eduard, Reiche, Sven, Sammut, Nicholas, Schietinger, Thomas, Voulot, Didier, Wagner, Ulrich
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funder: RIKEN
OpenAlex ID: W3089780052