Tests Of The Extended Range SRF Cavity Tuners For The LCLS-II-HE Project

The LCLS-II HE superconducting linac can produce multi-energy beams by supporting multiple undulator lines simultaneously. This could be achieved by using the cavity SRF tuner in the off-frequency detune mode. This off-frequency operation method was tested in the verification cryomodule (vCM) and CM...

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Bibliographic Details
Published in:arXiv.org 2022-08
Main Authors: Contreras-Martinez, C, Arkan, T, Cravatta, A, Hartsell, B, Kaluzny, J, Khabiboulline, T, Pischalnikov, Y, Posen, S, Romanov, G, Yun, J C
Format: Article
Language:English
Subjects:
Frequency shift
Tuners
Online Access:Get full text
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Summary:The LCLS-II HE superconducting linac can produce multi-energy beams by supporting multiple undulator lines simultaneously. This could be achieved by using the cavity SRF tuner in the off-frequency detune mode. This off-frequency operation method was tested in the verification cryomodule (vCM) and CM 1 at Fermilab at 2 K. In both cases, the tuners achieved a frequency shift of -565\(\pm\)80 kHz. This study will discuss cavity frequency during each step as it is being assembled in the cryomodule string and finally when it is being tested at 2 K. Tracking the cavity frequency helped enable the tuners to reach this large frequency shift. The specific procedures of tuner setting during assembly will be presented.
ISSN:2331-8422