Progress towards continuous wave operation of the SRF Linac at DESY

D. Kostin; J. Sekutowicz

doi:10.1117/12.2524952

14 May 2019 Progress towards continuous wave operation of the SRF Linac at DESY

D. Kostin, J. Sekutowicz

Proceedings Volume 11054, Superconductivity and Particle Accelerators 2018; 1105406 (2019) https://doi.org/10.1117/12.2524952
Event: Superconductivity and Particle Accelerators 2018, 2018, Krakow, Poland

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.

Citation Download Citation

D. Kostin and J. Sekutowicz "Progress towards continuous wave operation of the SRF Linac at DESY", Proc. SPIE 11054, Superconductivity and Particle Accelerators 2018, 1105406 (14 May 2019); https://doi.org/10.1117/12.2524952

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