1. Shuichi NoguchiTTC Meeting at Milano, 2011.3.21 Injector Cryomodule for cERL at KEK Cavity 2 Prototypes were tested. Input Coupler 2 Couplers were tested. HOM Coupler 9 Couplers were tested. Frequency Tuner Slide-Jack Tuner. Cryostat Under Fabrication.

2. Shuichi NoguchiTTC Meeting at Milano, 2011.3.22 Design Specification for 5GeV ERL Injector RF Frequency : 1.3 GHz Beam Current : 100 mA cW Energy : 10 MeV Beam Power : 1 MW

3. Shuichi NoguchiTTC Meeting at Milano, 2011.3.23 Injector Module Parameters ( 10 MeV, 100 mA ) Frequency1.3 GHz Number of cell / cavity ( & Cavity ) 3 ( 2 )2 ( 4 )2 ( 3 )2 ( 2 )1 ( 4 ) Effective Length34.6 cm23.0 cm 11.5 cm Accelerating Voltage5 MV2.5 MV3.4 MV5 MV2.5 MV Accelerating Gradient14.5 MV/m10.9 MV/m14.7 MV/m21.7 MV/m R/Q 300     Geometrical Factor G   Unloaded Q1x10 10 Cavity Loss8.3 W3.2 W5.8 W12.5 W6.3 W Beam Current100 mA Beam Power500 KW250 KW340 KW500 KW250 KW Number of Input Coupler22222 Optimum Coupler Q1.7x10 5 1.3x10 5 1.7x10 5 2.5x10 5 Half Band Width3.8 kHz5.0 kHz3.8 kHz2.6 kHz Number of HOM Coupler55555 2k Load ( static )47 ( 11 ) W59 ( 17 ) W54 ( 14 ) W53 ( 11 ) W63 ( 17 ) W 5k Load ( static )64 ( 22 ) W92 ( 44 ) W75 ( 33 ) W58 ( 22 ) W80 ( 44 ) W 80k Load ( static )233 ( 85 ) W323 ( 155 ) W270 ( 120 ) W213 ( 85 ) W283 ( 155 ) W Injector Module Parameters

4. Shuichi NoguchiTTC Meeting at Milano, 2011.3.24 2cell x 32k5k80k StaticDynamicStaticDynamicStaticDynamic Cavity 6 W Input Coupler 2 W 6 W 8 W20 W 30 W HOM Cable 1 W4 W (100 W) 5 W 6 W15 W 20 W Sub-Total 3 W 12 W11 W 14 W 35 W 50 W Beam Pipe 4 W 10 W Others 5 W Module Total 14 W 40 W33 W 42 W120W 150 W Heat Load of Cryomodule ( 1 MW )

5. Shuichi NoguchiTTC Meeting at Milano, 2011.3.25 Cavity

6. Shuichi NoguchiTTC Meeting at Milano, 2011.3.26 Prototype 2-cell Cavity Two Input Couplers He Jacket End Plate:Ti 3-HOM Coupler 2-HOM Coupler STF Dumbbell ( t = 3.5 mm )

7. Shuichi NoguchiTTC Meeting at Milano, 2011.3.27 Prototype 2-cell Cavity

8. Shuichi NoguchiTTC Meeting at Milano, 2011.3.28 8 Vertical Tests of prototype 2-cell Cavities ERL prototype 2-cell #1 Cavity 2 loop & 2 antenna-type HOM ERL prototype 2-cell #2 Cavity 5 loop-type HOM couplers 1.no HOM pick-up probe 2.with 5 HOM pick-up probes Rres=38.6n  (Flange loss: 23n  )

9. Shuichi NoguchiTTC Meeting at Milano, 2011.3.29 2-cell cavities for cERL Cryomodule 9

10. Shuichi NoguchiTTC Meeting at Milano, 2011.3.210 Couplers

11. Shuichi NoguchiTTC Meeting at Milano, 2011.3.211 Fixed Input Coupler 5k 80k Water Cooling Coaxial Warm Window

12. Shuichi NoguchiTTC Meeting at Milano, 2011.3.212 Design & fabrication of input couplers 2K 5K 80K 300K V acc Q L P rf [MV] [x10 5 ] [kW] Cavity-1 1.5 10. 10 Cavity-2 2.5 4. 25 Cavity-3 2.5 4. 25 (Q L /coupler, P rf /coupler, I beam = 10 mA) Extension

13. Shuichi NoguchiTTC Meeting at Milano, 2011.3.213 300kW CW Klystron Conditioning of input couplers High power test stand Conditioning Results 1s, 0.1Hz, 100kW for 2h cw 30kW for 1.5h cw 50kW for 0.5h cw 100kW for 1 min

14. Shuichi NoguchiTTC Meeting at Milano, 2011.3.214 Improved HOM Coupler TESLA Type ERL

15. Shuichi NoguchiTTC Meeting at Milano, 2011.3.215 He Pressure=< 3 kPa Flow rate=< 10 m 3 /hour He <2K Rres=38.6n  (Flange loss: 23n  ) 13 MV/m limited by Pick-up

16. Shuichi NoguchiTTC Meeting at Milano, 2011.3.216 ModeFrequencyR / QMeasured Q L TE1111.57GHz 0.59  /cm 2 1000 1.63GHz 1.8  /cm 2 500 TM1101.80GHz 4.0  /cm 2 800 1.88GHz 1.9  /cm 2 1000 TM0112.28GHz 64  1000 2.31GHz 12  1200 TM0202.67GHz 0.4  2.69GHz 31  HOM Dumping with 5 Couplers

17. Shuichi NoguchiTTC Meeting at Milano, 2011.3.217 Tuner

18. Shuichi NoguchiTTC Meeting at Milano, 2011.3.218 Slide Jack Tuner 290N/  m Piezo Stack Drive Shaft Taper Invar Rod Roller

19. Shuichi NoguchiTTC Meeting at Milano, 2011.3.219 Slid-Jack Tuner Performance CavitySpring ConstantSensitivity 18 N/  m1.3 kHz/  m TunerTypeStroke MechanicalSlid - Jack1.6 mm 2.1 MHz Fine Tuner2 x Piezo ( 1000 V ) ~ 6  m ~ 8 kHz ( 2 x HBW )

20. Shuichi NoguchiTTC Meeting at Milano, 2011.3.220 Cryomodule

21. Shuichi NoguchiTTC Meeting at Milano, 2011.3.221 He Vessel (Ti) HOM Coupler Input Coupler Vacuum Vessel cERL Injector Cryomodule Cavity Ceramic window He gas Return L-He L-He Level Magnetic Shield

22. Shuichi NoguchiTTC Meeting at Milano, 2011.3.222 He Vessel HOM Coupler Input Coupler Vacuum Vessel cERL Injector Cryomodule Cavity Ceramic window He gas Return L-He L-He Level 5k L-He Panel Magnetic Shield Inside

23. Shuichi NoguchiTTC Meeting at Milano, 2011.3.223 cERL Injector Cryomodule 5k Panel 2k Cold Box

24. Shuichi NoguchiTTC Meeting at Milano, 2011.3.224 cERL Injector Cryomodule e-e- Vacuum Vessel Input Coupler Double Feed Cavity 3 x 2-cell 2k Gas Return

25. Shuichi NoguchiTTC Meeting at Milano, 2011.3.225 5k Panel 5k He Pipe 5k He Panel

26. Shuichi NoguchiTTC Meeting at Milano, 2011.3.226 Schedule Calendar Year 201120122013 Cavity Input Coupler Cryostat Module Cooldown Beam VT Jacket Processing Assembly