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RIS citation export for TUPMP006: Cryogenic Tests of the SPIRAL2 LINAC Systems

AU  - Ghribi, A.
AU  - Bernaudin, P.-E.
AU  - Ferdinand, R.
AU  - Vassal, A.V.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Cryogenic Tests of the SPIRAL2 LINAC Systems
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Two full cool-down of the SPIRAL2 superconducting LINAC have been performed in 2017 and 2018 respectively, followed by a total of around 5 months of tests at 4 K. Several cool-down strategies were tested, in order to minimize 100 K effect on the SC cavities. Helium bath regulations (level and pressure) have been tested and optimized. Effects of pressure instabilities and coupling with the cryogenic plant have also been observed. Cryogenic performances of each cryomodule have been measured. Low-level RF measurements were also performed on all cavities and showed unidentified modulations at frequencies around 5Hz. These turned out to be thermoacoustic oscillations (TAO) on the cryogenic lines, which generate important pressure instabilities. Several solutions to remove TAO and cure these instabilities have been tested and one has been successfully deployed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1240
EP  - 1243
KW  - cavity
KW  - cryomodule
KW  - cryogenics
KW  - linac
KW  - operation
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPMP006
UR  - http://jacow.org/ipac2019/papers/tupmp006.pdf
ER  -