W. Wuensch CLIC project meeting High-power rf structure testing

I’ll cover structure and testing requirements for a program with boundary conditions: covers roughly five years arrive to industrialize-able structures still pursues higher performance

Our X-band menagerie: Main linac accelerating structures Other X-band – crab, bunch compressor PETS rf network ***in low breakdown rate tests***

Finished products

NLCTA at SLAC Nextef at KEK New klystron at CERN Two-beam test stand at CERN ASTA at SLAC Prototype accelerating structure test areas

High Power Operation History Final Run at 230 ns: 94 hrs at 100 MV/m w BDR = 7.6e-5 60 hrs at 85 MV/m w BDR = 2.4e-6 TD18 C. Adolphsen F. Wang SLAC

Processed for 1744 hours. 2011/3/117T24#3 Summary (7) KEK

T24#3 BDR evolution at 252ns normalized 100MV/m 2011/3/118T24#3 Summary (7) Assuming the same exponential slope as that at 400hr We understand the BDR has been kept decreasing. From T. Higo

Results summary

CTF3 linac PETs branch High-gradient test stand, CTF2 High-power transfer line Two-beam 30 GHz power production in CTF3 converted to beam-loading experiment.

Finish up baseline: TD24, compact couplers, SiC loads and manifolds, wakefield monitor 10 Optimize process: Material, machining, surface and heat treatment with low-power (recirculation), MW, so 2 to 4 per testing slot. 40 Baseline evolution: Optimized high-power design, new energy optimum 10 Alternatives: DDS and hybrid derivatives, choke mode, quadrants 10 Basic studies: High-power phenomenon, exotic stuff 5 Medium-series: Statistical and long term 50 Other X-band: Crab cavity and bunch compressor 5 PETS: Consolidate results, statistics – 150 MW input power, so 2 slots per test 5 rf network: Prototype network tests 5 What’s next:

Testing 50 Hz Process optimization, basic studies 1-2 months Prototypes3-6 months Long-term1-2 years

slot years Finish up baseline:10 5 TD24, compact couplers, SiC loads and manifolds, wakefield monitor Optimize process:40 4 Material, machining, surface and heat treatment with low-power (recirculation), MW, so 2 to 4 per testing slot. Baseline evolution:10 5 Optimized high-power design, new energy optimum Alternatives:10 5 DDS and hybrid derivatives, choke mode, quadrants Basic studies:5 0.5 High-power phenomenon, exotic stuff Medium-series:50 40 Statistical (40) and long term (10) Other X-band:5 2.5 Crab cavity and bunch compressor PETS:5 2.5 Consolidate results, statistics – 150 MW input power, so 2 slots per test rf network:5 1.2 Prototype network tests Total65.7 Integrated time

High-power, high rep-rate test areas klystron 1, 50 MW, SLAC operation at 1 slots/stand klystron 2, 50 MW CPIsupply and comissioning operation at 2 slots/klystron klystron 3, 50 MW CPI klystron 4 klystron 5 klystron 6 klystron 7 KEK klystron lifetime estimate SLAC Saclay 2x5 MW Thalesproposal Valencia 5 MW, 9.3 GHz L3proposal Groningen 2x5 MW L3proposal Uppsalaintention UK R&D linacrumours Frascattirumours number of rf ports Total slot years:38 Testing capability scenario