the cockcroft institute of accelerator science and technology uknf rf: status cockcroft institute...
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THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
UKNF RF: Status
Cockcroft Institute(Dept. Engineering, Lancaster University, UK)
January 2007
Rebecca Seviour
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
ObjectivesObjectives
• Complement the US research programme
• Investigate surface topology & Chemistry• How preparation effect topology & Chemistry• Try to determine reproducibility• Try to determine which dominates performance• Investigate alternatives to Electropolishing
• Modularised approach
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
…… positively impressed by the systematic and scientific approach
… considers [this activity] to be very important it deserves continuous and increasing support.
Junji Urakawa KEK; Roland Garoby CERN; Ilan Ben-Zvi BNL; F. Willeke DESY
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
• WP4 – still waiting decision
• FP7 – CERN SCRF Facility - SCRF Research (CARE)
- Novel Acc Systems- MUON Cooling
• UK NF RF Collaboration (Establishing)- Cockcroft/ IC/ Brunel
StatusStatus
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
UK NF RF Collaboration UK NF RF
Collaboration
Shell Manufacture
- OFHC Cu Spec 101 vs 103 !!
- fabrication Technique - Spining - Hydroforming
- Welding- EBW- TiG- Laser Welding- Position of Weld
- Port pulling
- Tuning system
- Cooling
Surface Prep & characterisation
- Electropolishing- Different chemical Specs
- Auger- Develop statistical map of impurities
- Topology Mapping (AFM)- Develop statistical map of defects
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY(Defects)
(Defects/Surface)
(Shape/Defects/Surface)
Elctropolishing
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
201 MHz CavitySimulation
201 MHz CavitySimulation
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
Issues:Quality of E Beam
weld
Issues:Quality of E Beam
weld
EB vs TIG
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
Plasma Spots Hot Spots
(2004)
Cracking
Field Emission
Workshop on High Gradient RFArgonne National Laboratory
October 7-9, 2003 Issues:Surface Finish
Issues:Surface Finish
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
Electro PolishingElectro Polishing
Pump(0-1 L/min)(Need)
Heat Exchanger
DC Supply (0-32 V, 0-300 A, ripple ~35 mV (rms))(Need)
+ R. Rimmer, and own mix
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGYCurrently just going to try deionised filtered water
RinseRinse
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
Electro Polishing Issues
Electro Polishing Issues
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY
Clean Room Assembly Class 100
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and
TECHNOLOGY