TD 26 CC PLANS FROM CIEMAT Laura Snchez
- Slides: 16
TD 26 CC PLANS FROM CIEMAT Laura Sánchez on behalf Electrical Engineering Group of CIEMAT
Overview Previous experience on RF prototypes TBL PETS (CTF 3) DOUBLE-LENGTH CLIC PETS (CTF 3 - CLEX) BUNCHER CAVITY (LIPAc-IFMIF) LINAC OF MICROTRON FOR CANCER THERAPY o Precision machining o Cleaning o Joining: brazing, TIG, EBW o Assembly o Testing Plans for manufacturing CLIC structures TD 26 CC o Ultra precision machining o Bonding Group facilities and conclusions
Scope of the collaboration on PETS TBL-PETS DOUBLE –LENGTH CLIC PETS PROTOTYPING • Engineering design. • Manufacturing • Joining • Assembly. • Low power RF Tests. TBL-PETS SERIES PRODUCTION • Fabrication • Cooling circuits • Waveguides/flanges • Vacuum tanks • Assembly & testing 3 PETS
Other RF prototypes BUNCHER MICROTRON First RF cavity entirely developed by a Spanish Group FULL R&D: • RF, thermal and mechanical design • Manufacturing and Joining • Assembly. • Low power RF Tests. • High power tests (ALBA) PROTOYIPING • RF and thermal design • Engineering design • Manufacturing • Joining: brazing (CERN) • Low power testing
Bars Precision Machining: DOUBLE-LENGTH PETS 80 regular cells 532 mm long OFE Cu Tight tolerances • ± 15 μm • Ra < 0. 4 μm Diamond tools High speed milling All dimensions within tolerances Compact Couplers 2 Stress relieve HT 1 h 180ºC Monocrystal Diamond Tolerances Beam hole ± 10 μm Choke ± 15 μm Waveguides ± 20 μm RF surf Ra < 0. 3 μm
Precision Joining: Vacuum Brazing TBL PETS Thermal cycle waveguides at ITP Workshop Part Joint Filler alloy Brazing temp (ºC) Vacuum (mbar) CERN Coupler Cu/Cu 68. 5 Ag/26. 5 Cu/5 Pd ≈820 -825 < 10 -5 AIMEN (SP) Waveguide Cu/SS 82 Au/18 Ni 980 AIMEN Cooling Cu/(Ni)SS 68. 5 Ag/26. 5 Cu/5 Pd 815 ITP (SP) Waveguide Cu/(Ni)SS 68. 5 Ag/26. 5 Cu/5 Pd 815 ITP Cooling Cu/(Ni)SS 68. 5 Ag/26. 5 Cu/5 Pd 815 < 10 -4 < 10 -5
DOUBLE-LENGTH PETS COMPACT COUPLERS Workshop: Ecor Research (IT) Type of joints Filler alloy (%wt) Filler melting range (ºC) Vacuum (mbar) First Cu/Cu Cu/SS (unplated) 58 Ag/32 Cu/10 Pd 824 -852 <10 -6 Second Cu/SS (unplated) 68. 5 Ag/26. 5 Cu/5 Pd 807 -810 <10 -6 Workshop: Ecor Research (IT) BUNCHER INPUT COUPLER Brazing Step Type of joints Filler alloy (%wt) Filler melting range (ºC) Vacuum (mbar) First Cu/Alumina (metallized) 68. 5 Ag/26. 5 Cu/5 Pd 807 -810 <10 -6 Second Cu/Cu 70 Ag/30 Cu 780 <10 -6
Precision Assembly: Double-Length PETS: rods positioning before EBW Bars positioning Adjusting bars position TBL PETS: structure assembly Base Bars positioning Auxiliary discs, rings and supports. Centerings 50. 05/50. 00 mm Measuring bars position Dowel pins, rings, supports. Coupler positioning Bars inside the tank
Low power RF Tests (I) Antenna Transmission Method PETS S Parameters
Low power RF Tests (II): Bead Pull Method Microtron LINAC Double-Length PETS Buncher cavity
Plans for CLIC structures: TD 26 CC Scope of the collaboration CIEMAT will manufacture a TD 26 CC structure according CERN procedures Disc machining Bonding Parts machining Brazing Assembly Leak testing Tuning at CERN
Ultra-precision machining: Discs PETS bar CLIC structure disc Tolerances 10 times tighter Challenging step for • CIEMAT • MACHINING COMPANY Needed to revise tolerances Time Costs
Precision Joining: Bonding Technique not used before at CIEMAT Previous tests Adjusting bonding parameters as similar as possible to CERN experience Pressure (weight) Temperature H 2 pressure Time Bonding furnace Depending on the final roughness and flatness of the bonding surface High vacuum 15 mbar H 2 Mo chamber Courtesy Ecor Research
CIEMAT facilities Equipment for testing Equipment for assembly Clean room Network analyzers Leak detectors Granites Measuring machines Materials division at CIEMAT Optical microscopy Electronic microscopy Atomic force microscopy
Summary & Conclusions CIEMAT o Precision machining of copper pieces o Dimensional control procedures o Precision joining o Assembly o RF low power testing Companies o o DMP (SP) o Qualified by CERN for CLIC discs machining o LEITZ INFINITY Coordinate measuring machine Ecor Research (IT) o o vacuum brazing Tecnalia (SP) o vacuum brazing o bonding o hot pressing We are ready to start the production of a TD 26 CC accelerating structure
Thank you for your attention