SRF2015 - List of Authors (Napoly, O.)

Paper

Title

Page

Cleanliness and Vacuum Acceptance Tests for the UHV Cavity String of the XFEL Linac

452

S. Berry, O. Napoly, B. Visentin
CEA/DSM/IRFU, France
C. Boulch, C. Cloué, C. Madec, T. Trublet
CEA/IRFU, Gif-sur-Yvette, France
D. Henning, L. Lilje, A. Matheisen, M. Schmökel
DESY, Hamburg, Germany

The main linac of the European XFEL will consist of 100 accelerator modules, i.e. 800 superconducting accelerator cavities operated at a design gradient of 23.6MV/m. In this context CEA-Saclay built an assembly facility designed to produce one module per week, ready to be tested at DESY. The facility overcame the foreseen production rate. We would like to highlight and discuss the critical fields: cleanliness and vacuum. A new assembly method to protect final assembly against particulates contamination has been implemented on the production line. Impact on cryomodule RF test is presented. Particle transport measurements on components used for the European XFEL accelerator module are presented. The results indicate that the nominal operation of the automated pumping and venting units will not lead to particle transport. Vacuum acceptance tests are of major interest: leak tests and residual gas analysis (RGA) are used to control the absence of air leak and contamination. The RGA specifications have been slightly relaxed to ensure the production rate.

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FRAA02

Module Performance in XFEL Cryomodule Mass-Production

O. Napoly
CEA/DSM/IRFU, France

The European XFEL cryomodule assembly is executed in CEA-Saclay premises and infrastructure by an industrial company, Alsyom, under the supervision of CEA. The nominal assembly throughput and delivery rate of one cryomodule per week has been reached with XM15 in October 2015. With a throughput of 4 days in place in January 2015 with XM26, the delivery of XM100 is currently foreseen before mid-2016. This contribution will present the status of this large scale production project, insisting on the challenges, both technical and organizational, for achieving the quantitative production goal, and on the enhanced quality control put in place in parallel to achieve the qualitative goals in term of module conformance and RF performance. Mitigation of non-conformities generated by the accelerator components, by the assembly tools and finally by the assembly process is essential to eliminate their impact on the production schedule and, especially for the last category, on the module acceptance. The most significant module test results will be discussed with emphasis on their correlation (or lack of thereof) to detailed assembly conditions and their evolution.

Slides FRAA02 [14.103 MB]

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Paper	Title	Page
MOPB118	Cleanliness and Vacuum Acceptance Tests for the UHV Cavity String of the XFEL Linac	452
	S. Berry, O. Napoly, B. Visentin CEA/DSM/IRFU, France C. Boulch, C. Cloué, C. Madec, T. Trublet CEA/IRFU, Gif-sur-Yvette, France D. Henning, L. Lilje, A. Matheisen, M. Schmökel DESY, Hamburg, Germany
	The main linac of the European XFEL will consist of 100 accelerator modules, i.e. 800 superconducting accelerator cavities operated at a design gradient of 23.6MV/m. In this context CEA-Saclay built an assembly facility designed to produce one module per week, ready to be tested at DESY. The facility overcame the foreseen production rate. We would like to highlight and discuss the critical fields: cleanliness and vacuum. A new assembly method to protect final assembly against particulates contamination has been implemented on the production line. Impact on cryomodule RF test is presented. Particle transport measurements on components used for the European XFEL accelerator module are presented. The results indicate that the nominal operation of the automated pumping and venting units will not lead to particle transport. Vacuum acceptance tests are of major interest: leak tests and residual gas analysis (RGA) are used to control the absence of air leak and contamination. The RGA specifications have been slightly relaxed to ensure the production rate.
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FRAA02	Module Performance in XFEL Cryomodule Mass-Production
	O. Napoly CEA/DSM/IRFU, France
	The European XFEL cryomodule assembly is executed in CEA-Saclay premises and infrastructure by an industrial company, Alsyom, under the supervision of CEA. The nominal assembly throughput and delivery rate of one cryomodule per week has been reached with XM15 in October 2015. With a throughput of 4 days in place in January 2015 with XM26, the delivery of XM100 is currently foreseen before mid-2016. This contribution will present the status of this large scale production project, insisting on the challenges, both technical and organizational, for achieving the quantitative production goal, and on the enhanced quality control put in place in parallel to achieve the qualitative goals in term of module conformance and RF performance. Mitigation of non-conformities generated by the accelerator components, by the assembly tools and finally by the assembly process is essential to eliminate their impact on the production schedule and, especially for the last category, on the module acceptance. The most significant module test results will be discussed with emphasis on their correlation (or lack of thereof) to detailed assembly conditions and their evolution.
	Slides FRAA02 [14.103 MB]
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)