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Shuichi Noguchi,SRF2007,10.71 New Tuners for ILC Cavity Application Shuichi Noguchi KEK
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Shuichi Noguchi,SRF2007,10.72 Outline Brief Introduction New Tuners for ILC Application Elliptical Cavity Pulsed Operation High Gradient Lorentz Detuning Compensation ( Cavity Deformation by Maxwell Stress )
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Shuichi Noguchi,SRF2007,10.73 Frequency Tuner RF Accelerating Cavities usually have Tuners. They are used to tune the Cavity Resonance Frequency, in order to minimize the reflected RF power, usually. Tuning Accuracy << Resonant Band Width They must cover the Wide Range of the Fabrication Error. Feed-back can be used in CW operation.
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Shuichi Noguchi,SRF2007,10.74 Possible Error Sources Error Sources Magnitude / Bandwidth Speed Fabrication Error Very LargeStatic Drift ( Temperature, Pressure )ComparableSlow Micro-Phonics ( Vibration )SmallSlow Beam Loading ( if is not 0 ) ComparableSlow De-tuning OffsetComparableOffset Lorentz De-tuningComparableFast in Transient
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Shuichi Noguchi,SRF2007,10.75 Tuning Principle : by Slater Volume Change of ΔV Frequency Change of Δf
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Shuichi Noguchi,SRF2007,10.76 Normal ConductingSuperconducting Stretch / Squeeze ~1 Piston Tuners 3000N/mm
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Shuichi Noguchi,SRF2007,10.77 New Tuners Several Candidates for the ILC Cavity Requirement Stroke > 2mm, Axial Force > 6000N It must not move the Beam Axis. Compact and Reliable Fast Response Piezo
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Shuichi Noguchi,SRF2007,10.78 123 Booster TunerBooster-1Booster-2Booster-3Experience Saclay-1Lever ScrewTTF Saclay-2Cam & LeverScrewUnder Test Blade LeverScrewUnder Test Ball-ScrewLarge ScrewWorm Gear Under Test Slide JackWedgeScrewGearUnder Test Drive (Motor) Piezo 3000N/mm Need Force Boosters Common Configuration of Tuners
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Shuichi Noguchi,SRF2007,10.79 Drive Force Fixed Point Acting Point Lever He Jacket Bellows Lever Arm
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Shuichi Noguchi,SRF2007,10.710 Saclay -1 : Operation Principle Design by M. Maurier and P. Leconte based of the MACSE tuner design L screw L arms L cavity Second Lever First Lever Motor Notch to absorb Span Change Support Rod Screw
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Shuichi Noguchi,SRF2007,10.711 Saclay-1 on a TTF Cavity Double Lever Tuner Stiffness ~ 100 N/ m Second LeverFirst Lever Two Piezos Motor & Gear Screw
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Shuichi Noguchi,SRF2007,10.712 Saclay – 2 : Cam & Lever Cam Lever Arm Drive Screw Motor & Gear Shaft Support
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Shuichi Noguchi,SRF2007,10.713 Saclay - 2 : Cam & Lever Eccentric Shaft (Cam) Shaft Support with Piezo He Jacket Lever Arm
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Shuichi Noguchi,SRF2007,10.714
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Shuichi Noguchi,SRF2007,10.715 Blade : Jack System
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Shuichi Noguchi,SRF2007,10.716 Blade : Jack, Lever & Screw Lever Piezo Gear & Motor Screw
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Shuichi Noguchi,SRF2007,10.717 Blade Tuner 25 N/ m Original DESY Revised INFN Not Stiff, Fatigue of Blade, K S =13N/ m
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Shuichi Noguchi,SRF2007,10.718 Ball Screw : Large Ball Screw
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Shuichi Noguchi,SRF2007,10.719 Coaxial Ball Screw 500N/ m Need Long Stroke Piezo, Fatigue of Blade
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Shuichi Noguchi,SRF2007,10.720 Slide Jack Tuner Roller Wedge & Screw Caterpillar Roller Screw
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Shuichi Noguchi,SRF2007,10.721 Slide Jack Tuner 290N/ m Piezo Stack Drive Shaft Taper Invar Rod Caterpillar
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Shuichi Noguchi,SRF2007,10.722 Tesla-like STF Baseline Cavity Package Pulse motor (outside) Piezo element Replaceable Motor drive shaft Titanium Jacket 2K He line Support base Invar Rod Slide Jack Tuner Nb/Ti Flange Inside Magnetic Shield Stiff Endplate Fixed Coupler
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Shuichi Noguchi,SRF2007,10.723 Summary Several Candidates for ILC Application After Experimental Demonstration of Performances and Comparison from many Aspects, Decision will be done. Some of these Tuners can be used for other Application, with Simplified Design.
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