SRF2017 - List of Authors (Cenni, E.)

Paper	Title	Page
TUPB072	Investigation of BCP Parameters for Mastery of SRF Cavity Treatment	558
	F. Éozénou CEA/DSM/IRFU, France E. Cenni, G. Devanz, T. Percerou, Th. Proslier, C. Servouin CEA/DRF/IRFU, Gif-sur-Yvette, France M.L.L. Nghiem UPMC, Paris, France
	Mastery of Standard Buffered Chemical Polishing (with mixture of hydrofluoric, nitric and phosphoric acids) is of paramount importance for the treatment of SRF resonators with complex geometry has IFMIF half-wave resonators, in order to control accurately their frequency evolution. Furthermore, strong and unexpected asymmetry in removals has recently been observed after BCP treatment of ESS-medium beta resonators. The goal of this study is to investigate accurately influence of parameters such as surface geometry and orientation, acid temperature, agitation and their coupling on the removal rate. We will also focus on the influence of by-products such has NOx on kinetics. The mixture used is HF(40%)- HNO3(65%)-H3PO4(85%) with ratio 1-1-2.4.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2017-TUPB072
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THYA05	Developments and Progress with ESS Elliptical Cryomodules at CEA-Saclay and IPN-orsay	729
	F. Peauger, C. Arcambal, F. Ardellier, S. Berry, P. Bosland, A. Bouygues, E. Cenni, J.-P. Charrier, G. Devanz, F. Éozénou, A. Gaget, D. Gevaert, A. Gomes, T. Hamelin, X. Hanus, P. Hardy, V.M. Hennion, T.J. Joannem, C. Marchand, O. Piquet, J.P. Poupeau, B. Renard, P. Sahuquet, T. Trublet CEA/DRF/IRFU, Gif-sur-Yvette, France C. Darve ESS, Lund, Sweden G. Olivier IPN, Orsay, France
	CEA Saclay in collaboration with IPN Orsay is in charge of the ESS elliptical cavities cryomodule design, prototyping and series production. Two cryomodule prototypes are being developed and will be tested at CEA Saclay before starting the series production. The main cryomodule design features are first reminded. We present the cavities and couplers test results and the achieved assembly sequences of the first medium beta cavities cryomodule demonstrator M-ECCTD. The progress on the preparation of the CEA cryomodule test station is given. The procurement status and development plan of the second high beta demonstrator H-ECCTD are also reported. Finally we give the components procurement progress and the assembly strategy of the 30 series cry-omodules to be integrated at CEA before delivery to ESS at Lund.
	Slides THYA05 [11.226 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2017-THYA05
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Investigation of BCP Parameters for Mastery of SRF Cavity Treatment

558

F. Éozénou
CEA/DSM/IRFU, France
E. Cenni, G. Devanz, T. Percerou, Th. Proslier, C. Servouin
CEA/DRF/IRFU, Gif-sur-Yvette, France
M.L.L. Nghiem
UPMC, Paris, France

Mastery of Standard Buffered Chemical Polishing (with mixture of hydrofluoric, nitric and phosphoric acids) is of paramount importance for the treatment of SRF resonators with complex geometry has IFMIF half-wave resonators, in order to control accurately their frequency evolution. Furthermore, strong and unexpected asymmetry in removals has recently been observed after BCP treatment of ESS-medium beta resonators. The goal of this study is to investigate accurately influence of parameters such as surface geometry and orientation, acid temperature, agitation and their coupling on the removal rate. We will also focus on the influence of by-products such has NOx on kinetics. The mixture used is HF(40%)- HNO3(65%)-H3PO4(85%) with ratio 1-1-2.4.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2017-TUPB072

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THYA05

Developments and Progress with ESS Elliptical Cryomodules at CEA-Saclay and IPN-orsay

729

F. Peauger, C. Arcambal, F. Ardellier, S. Berry, P. Bosland, A. Bouygues, E. Cenni, J.-P. Charrier, G. Devanz, F. Éozénou, A. Gaget, D. Gevaert, A. Gomes, T. Hamelin, X. Hanus, P. Hardy, V.M. Hennion, T.J. Joannem, C. Marchand, O. Piquet, J.P. Poupeau, B. Renard, P. Sahuquet, T. Trublet
CEA/DRF/IRFU, Gif-sur-Yvette, France
C. Darve
ESS, Lund, Sweden
G. Olivier
IPN, Orsay, France

CEA Saclay in collaboration with IPN Orsay is in charge of the ESS elliptical cavities cryomodule design, prototyping and series production. Two cryomodule prototypes are being developed and will be tested at CEA Saclay before starting the series production. The main cryomodule design features are first reminded. We present the cavities and couplers test results and the achieved assembly sequences of the first medium beta cavities cryomodule demonstrator M-ECCTD. The progress on the preparation of the CEA cryomodule test station is given. The procurement status and development plan of the second high beta demonstrator H-ECCTD are also reported. Finally we give the components procurement progress and the assembly strategy of the 30 series cry-omodules to be integrated at CEA before delivery to ESS at Lund.

Slides THYA05 [11.226 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-SRF2017-THYA05

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)