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Proceedings Paper

Progress towards continuous wave operation of the SRF Linac at DESY
Author(s): D. Kostin; J. Sekutowicz
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Paper Abstract

Continuous Wave (CW) mode is the origin of the Superconducting Radio-Frequency (SRF) accelerator technology. European XFEL project1 was based on the Linear Collider (LC) technology (TESLA) operating in the pulsed RF power mode (10Hz / 650μs beam pulse). Many FEL user experiments will get an advantage (or become possible) with CW mode operation. European XFEL (E-XFEL) SRF accelerator recently reached its project goal of 17.5 GeV electron beam energy. Possible CW mode linac operation scenario with 17 modified injector section cryo-modules (CM) may reach ~50% of that energy with 25μA (100pC and 250kHz) CW beam in E-XFEL. A Long Pulse (LP) mode (duty factor < 100%) may provide even higher beam energies and still long enough FEL radiation pulses. Very encouraging results have been obtained at DESY on Cryo Module Test Bench (CMTB) during CW/LP tests of EXFEL prototype CMs. The possibility to run an E-XFEL accelerating module in CW/LP mode was clearly shown together with reaching higher unloaded Q-factor of the cavities in the CM4.

Paper Details

Date Published: 14 May 2019
PDF: 9 pages
Proc. SPIE 11054, Superconductivity and Particle Accelerators 2018, 1105406 (14 May 2019); doi: 10.1117/12.2524952
Show Author Affiliations
D. Kostin, DESY (Germany)
J. Sekutowicz, DESY (Germany)

Published in SPIE Proceedings Vol. 11054:
Superconductivity and Particle Accelerators 2018
Dariusz Bocian; Ryszard S. Romaniuk, Editor(s)

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