Some Interesting Observations During Vertical Test on ESS-HB-704 SRF Cavities

Dumbell, Keith; Akintola, Ayomikun; Buckley, Rachael; Ellis, Mike; Hancock, Mark; Hathaway, Jane; Hitchen, Sean; Hodgkinson, Carl; Hornickel, Philip; Jenkins, Conor; Jones, Geraint; Lewis, Jonathan; Lowe, Mike; Mason, David; May, Andrew; McIntosh, Peter; Middleman, Keith; Miller, George; Moss, Andrew; Mutch, Jenifer; Oates, Adrian; Pattalwar, Shrikant; Pendleton, Mark; Smith, Paul; Wheelhouse, Alan; Wilde, Stuart; Wilson, James

doi:10.18429/JACoW-LINAC2022-THPOGE05

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RIS citation export for THPOGE05: Some Interesting Observations During Vertical Test on ESS-HB-704 SRF Cavities

TY  - CONF
AU  - Dumbell, K.D.
AU  - Akintola, A.E.T.
AU  - Buckley, R.K.
AU  - Ellis, M.J.
AU  - Hancock, M.D.
AU  - Hathaway, J.
AU  - Hitchen, S.
AU  - Hodgkinson, C.
AU  - Hornickel, P.C.
AU  - Jenkins, C.R.
AU  - Jones, G.
AU  - Lewis, J.
AU  - Lowe, M.
AU  - Mason, D.A.
AU  - May, A.J.
AU  - McIntosh, P.A.
AU  - Middleman, K.J.
AU  - Miller, G.
AU  - Moss, A.J.
AU  - Mutch, J.
AU  - Oates, A.
AU  - Pattalwar, S.M.
AU  - Pendleton, M.D.
AU  - Smith, P.A.
AU  - Wheelhouse, A.E.
AU  - Wilde, S.
AU  - Wilson, J.T.G.
ED  - McIntosh, Peter
ED  - Burt, Graeme
ED  - Apsimon, Robert
ED  - Schaa, Volker R.W.
TI  - Some Interesting Observations During Vertical Test on ESS-HB-704 SRF Cavities
J2  - Proc. of LINAC2022, Liverpool, UK, 28 August-02 September 2022
CY  - Liverpool, UK
T2  - International Linear Accelerator Conference
T3  - 31
LA  - english
AB  - The vertical test stand in use at Daresbury has three cavities loaded horizontally at different heights. The jacketed cavities are supplied with liquid helium from a header tank at the top of the configuration. A few cavities have been tested in different positions and the results have been analysed. The pressure of the helium inside the jacketed cavities is affected by the height of the liquid helium column above the jacket and using results from earlier analysis during cool-down enables the pressure of the cavity to be determined from the frequency of operation. Analysis of the effects may allow for corrections to the frequency to be made. In addition to the above observations there have also been some challenges in the operation at higher power as the phase of the self-excited loop driving the system, has been seen to change. This paper discusses some of the observation, analysis of those observations and challenges that are being addressed in the continuing use of this facility.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 812
EP  - 813
KW  - cavity
KW  - accelerating-gradient
KW  - operation
KW  - MMI
KW  - SRF
DA  - 2022/09
PY  - 2022
SN  - 2226-0366
SN  - 978-3-95450-215-8
DO  - doi:10.18429/JACoW-LINAC2022-THPOGE05
UR  - https://jacow.org/linac2022/papers/thpoge05.pdf
ER  -