1. W. Wuensch CLIC project meeting 8-7-2011 High-power rf structure testing

2. 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

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

4. Finished products

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

6. 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

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

8. 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

9. Results summary

10. 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.

11. 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), 10-20 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:

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

13. 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), 10-20 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

14. 201120122013201420152016 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 ports11211222226665999913 Total slot years:38 Testing capability scenario