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ILC Technical Highlights

ILC Technical Highlights. Superconducting RF Main Linac. Parametric Approach. A working space - optimize machine for cost/performance. The Baseline Machine (500GeV). ~30 km. ML ~10km (G = 31.5MV/m). 20mr. RTML ~1.6km. 2mr. BDS 5km. e+ undulator @ 150 GeV (~1.2km). x2. R = 955m

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ILC Technical Highlights

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  1. ILC Technical Highlights Superconducting RF Main Linac ILCSC Technical Highights

  2. Parametric Approach • A working space - optimize machine for cost/performance ILCSC Technical Highights

  3. The Baseline Machine (500GeV) ~30 km ML ~10km (G = 31.5MV/m) 20mr RTML ~1.6km 2mr BDS 5km e+ undulator @ 150 GeV (~1.2km) x2 R = 955m E = 5 GeV not to scale ILCSC Technical Highights

  4. Positron-style room-temperature accelerating section E=70-100 MeV laser standard ILC SCRF modules diagnostics section sub-harmonic bunchers + solenoids Electron Source • DC Guns incorporating photocathode illuminated by a Ti: Sapphire drive laser. • Long electron microbunches (~2 ns) are bunched in a bunching section • Accelerated in a room temperature linac to about 100 MeV and SRF linac to 5 GeV. ILCSC Technical Highights

  5. Primary e- source Beam Delivery System IP 250 GeV e- DR Positron Linac 150 GeV 100 GeV Helical Undulator In By-Pass Line Photon Collimators e+ DR Target e- Dump Photon Beam Dump Photon Target Adiabatic Matching Device e+ pre-accelerator ~5GeV Auxiliary e- Source Positron Source • Helical Undulator Based Positron Source with Keep Alive System Keep Alive: This source would have all bunches filled to 10% of nominal intensity. ILCSC Technical Highights

  6. ILC Small Damping Ring Multi-Bunch Trains with inter-train gaps ILCSC Technical Highights

  7. ILC Damping Ring: Baseline Design • Positrons: • Two rings of ~6 km circumference in a single tunnel. • Two rings are needed to reduce e-cloud effects unless significant progress can be made with mitigation techniques. • Preferred to 17 km dogbone due to: • Space-charge effects • Acceptance • Tunnel layout (commissioning time, stray fields) • Electrons: • One 6 km ring. ILCSC Technical Highights

  8. Main Linac: SRF Cavity Gradient Total length of one 500 GeV linac  20km * assuming 75% fill factor ILCSC Technical Highights

  9. Cavity: R&D • Material R&D: Fine, Large, Single Crystal • Fabrication • A number of minor modifications and improvements could be implemented without impact to the basic cavity design. • Cavity Preparation • Buffer Chemical Processing • Cavity Processing (strong R&D needed) • Electro-polishing (EP) System • High Pressure Rinsing (HPR) • Assembly Procedure ILCSC Technical Highights

  10. Superconducting RF Cavities High Gradient Accelerator 35 MV/meter -- 40 km linear collider ILCSC Technical Highights

  11. Improved ProcessingElectropolishing Chemical Polish Electro Polish ILCSC Technical Highights

  12. Increase diameter beyond X-FEL Increase diameter beyond X-FEL Review 2-phase pipe size and effect of slope ILC Cryomodule ILCSC Technical Highights

  13. RF Power: Baseline Klystrons Specification: 10MW MBK 1.5ms pulse 65% efficiency Thales CPI Toshiba ILCSC Technical Highights

  14. ILC Beam Delivery System • Baseline (supported, at the moment, by GDE exec) • two BDSs, 20/2mrad, 2 detectors, 2 longitudinally separated IR halls • Alternative 1 • two BDSs, 20/2mrad, 2 detectors in single IR hall @ Z=0 • Alternative 2 • single IR/BDS, collider hall long enough for two push-pull detectors ILCSC Technical Highights

  15. Detectors for the ILC • Large Scale 4p detectors with solenoidal magnetic fields. • In order to take full advantage of the ILC ability to reconstruct, need to improve resolutions, tracking, etc by factor of two or three • New techniques in calorimetry, granularity of readout etc being developed ILCSC Technical Highights

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