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Detailed summary of SuRf Lab's latest updates, including cryogenic performance, radiation survey progress, cleanroom build, and commissioning schedule for runs. Review of proposed testing and maintenance cycle for series cavities.
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SuRf Lab: (STFC) VTF Infrastructure and Process • SRF Collaboration Meeting: 25/06/2019 • Mark Pendleton • Paul Smith • Andy May • Dave Mason • On Behalf of the SuRF Lab Team
Run-1 cryogenic performance ~36 hours for shield cooldown to 75K ~6 hours for cavity support insert cooldown to 4.2K
Run-1 cryogenic performance Excellent pressure and temperature stability under static load at 2 K with PID control of 2 K pumps +/- 0.1 mbar +/- 1 mK Stability under dynamic load to be investigated in forthcoming run
P02 Q vs Eacc Measurements • Same calculation method used as CEA Saclay • Good agreement within expt error bars • Q-10-15% • Eacc-5% • Investigating the heat dissipated on the input probe at high power levels • Series cavities have a Cu probe, whereas prototypes have a Ti probe-3xRs-3 times loss • Radiation survey in progress- • cant complete till P02 on top cradle
Radiation Survey Points Pole outside ESS Office Bunker wall pointing toward main offices Top of LHe dewar
Cleanroom Update • Cleanroom build complete • Commissioning and validation • in progress. On - schedule. • HPR final build phase w/c 1st July • 2019
UPW system installed • Ultra pure water system installation completed on-time and as per specifications. • High pressure works on schedule to complete by 8th July 2019
Solution and proposal provided for Series Valve orientation : • Valve orientation requirement at 45 Degree for CEA integration. • Solution utilising 45 Degree elbow- fitted to each series cavity to suit STFC interface • Meets original design spec for STFC modular cleanrooms • RI to procure and install 88 elbows (STFC to implement change with RI) • STFC to receive cavity with elbow installed and capped (Spec. TBA) • STFC will ship to CEA with Elbow removed. (Spec TBA) • CEA will prep and clean DN40 valve for CEA interface connections. Elbow solution for series cavities
High Level SuRf Lab commissioning schedule Run 4 Run 2 Run 3 • Latest Schedule for commissioning with cavities available: • *P01: Current status at CEA for testing mid July 2019. Arrival @ STFC TBC. • * H001 First series dressed cavity tested at DESY due @ STFC 28th August 2019 • Run 2 (22 – 26 July): De-risk: Rad survey completion (P02 Top cradle) • and High Power Tests ~200W (localised cooling installed on flange) • Run 3 (30 Aug – 26 Sep): P01 + P02 Commissioning • Run 4 (17 – 27 Oct): P01 + P02 + H001 Commissioning • Utilising P01 + P02 + H001 for commissioning and De-risk • SuRf lab to review and update series schedule after Run 3
Objectives for Run 2 • Use copper block to thermally anchor the flange-reduce temp rise • Do we need to do a phase optimisation at high power • If YES • Perform Phase optimisation-then wait to cool • Perform decay measurement then wait to cool (Like DESY) • Just measure the transmitted power? • If NO • Perform decay measurement then wait to cool (Like DESY) • Just measure the transmitted power • Perform Radiation Survey with P02 on top cradle & measure Rad
Commissioning and validation with Series cavities • Proposal: 1st Quarter of 2020 will be utilised for • verification and validation of STFC VTF with dressed HB002 • + HB003 + HB004 tested from DESY. Commissioning • times may be shortened dependant on Run3 conclusions. • Di-Phase pipe cutting validation with DESY: HB001 (TBC) • Box validated by STFC cavity production team • Further De-risk testing strategies under consideration
Proposed annual testing and maintenance cycle • Run 3 will be used for system optimisation • Target to test 3 Cavities every 2 weeks (system design S.P) • Schedule proposed for the testing over one year cycle • Anticipated 66 tests per year with quarterly and yearly technical stops. • Next steps to define STFC acceptance criteria for full validation
Target 2 week Cycle: • Proposed 2 week cycle for • Testing x3 cavities • Linked for mapping resource • Contingency built into the programme to allow cross-over of staff and uncertantites of the testing specifciation/duration • i.e. Cavity processing time cut off 1 hr? • Draft plan under development
SuRF Lab QMS • SuRf Lab Database under development for the STFC cavity workflow
Next Steps: • Review lessons learnt from Run 1. Adapt Run 2/3 • Update processes and procedures • Update plans with new data to meet TA deadline. • QMS: Commission data management system • Completion of the workstations: procurement, installation, commissioning. • Complete planning for the completion of CSI A for series cavities. • 5’s type system for the SuRf Lab area • Training of all staff; on the job and collaborator opportunities