1. ESS High Beta Cavities
Quality Assurance and Control - Learning and Planning Workshops,
CEA Saclay, 30 June - 1 July 2016
Mark Pendleton
STFC, Daresbury Laboratory

2. MD Pendleton_QA/QC_Workshop_CEA_300616
QA/QC – Plan
- Lessons learnt from Collaborators
- Qualifying Infrastructure
- ‘Cavity Qualification’
- Data management system
MD Pendleton_QA/QC_Workshop_CEA_300616

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Lessons learnt from our Collaborators:
Gaining knowledge and experience from XFEL/ CEA Saclay including proposals and feedback from the Medium Beta and High Beta prototypes
XFEL - Eddie current scanning, Fabrication breakdown structure and Cleanroom training.
CEA Saclay – Infrastructure (Cleanroom + HPR) and witness Medium Beta cavity testing
MD Pendleton_QA/QC_Workshop_CEA_300616

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Unique to STFC - Qualifying infrastructure:
Cleanroom – required ISO standards, Procedures and Processes, Tooling, cavity re-work flow – QC steps.
HPR – Confirm facility specifcation, Procedures and Processes, commissioning, QC steps.
Vertical Test Facility – Commissioning, Procedures and processes – QC steps.
STFC Infrastructure commissioning:
High beta cavity prototypes available to STFC for infrastructure qualification - preferably 3 cavities?
Dates TBC.
MD Pendleton_QA/QC_Workshop_CEA_300616

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Cavity Qualification:
Ensuring the highest quality/traceability for procurement, fabrication and testing of the ESS High Beta cavities.
QC steps to be determined between ESS/STFC/CEA.
Nb Spec
Eddy current
scanning
Testing
Fabrication
MD Pendleton_QA/QC_Workshop_CEA_300616

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Data management:
Determine the organisation of ‘External Quality Control’
Deliverables to ESS:
What parameters/documentation ESS expects per cavity.
Reporting structure – sign off (Inspection reports).
Managing of Non Conformities (NCR)
Industry – STFC – CEA – ESS
Solving issues within an agreed timescale (fast Response)
Final release of the cavity
Acceptance tests
Courtesy of INFN
MD Pendleton_QA/QC_Workshop_CEA_300616

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Acceptance levels with ESS and Collaborators
Example from INFN:
Level
Cavity status
Needed documents
If Level reached
One
“Naked” cavity after mechanical fabrication
Mechanical, RF, vacuum, visual documents
Proceed to Level Two
Two
Cavity before He-tank integration
Mechanical, RF, vacuum, Treatment documents & tank documents
Proceed to Level Three
Three
Accessory assembly, last surface treatments, outer inspection document
Treatment, vacuum, RF, transfer measurements documents
Integrated cavity ready to be cold RF tested
Four
Cavity cold tested
Documents relative to cold test results and in/out checks
Cavity can be sent to CEA for string assembly
Five
Cavity accepted for string assembly
Documents with incoming inspection at CEA
Cavity final approval
ESS to confirm Acceptance criteria at each major process operation
MD Pendleton_QA/QC_Workshop_CEA_300616
Courtesy of INFN

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Current status of QA System: Currently working with ESS and collaborators to determine parameters and data transfer system
EDMS: ruled out (Cost + time)
Word based docs (Fermilab)
Alfresco: Planned to liaise with INFN
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