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Summary of Cavity Performance in S1-Global

Summary of Cavity Performance in S1-Global. Outline. Overview of S1-Global Cryomodule Cavity Performance 4-cavity, 7-cavity operation Summary. Cryomodule - C. Cryomodule - A. International Team for S1-Global. A. Bosotti, C. Pagani, R. Paparella, P. Pierini, INFN (Italy)

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Summary of Cavity Performance in S1-Global

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  1. Summary of Cavity Performance in S1-Global ALCPG11 meeting Global Design Effort

  2. Outline • Overview of S1-Global Cryomodule • Cavity Performance • 4-cavity, 7-cavity operation • Summary Cryomodule - C Cryomodule - A ALCPG11 meeting Global Design Effort

  3. International Team for S1-Global A. Bosotti, C. Pagani, R. Paparella, P. Pierini, INFN (Italy) K. Jensch, D. Kostin, L. Lilje, A. Matheisen, W.-D. Moeller, M. Schmoekel, P. Schilling, H. Weise, DESY (Germany) T. Arkan, S. Barbanotti, M. Battistoni, H. Carter, M. Champion, A. Hocker, R. Kephart, J. Kerby, D. Mitchell, Y. Pischalnikov, T.J. Peterson, M. Ross, W. Schappert, B. Smith, FNAL (USA) C. Adolphsen, C. Nantista, SLAC (USA) M. Akemoto, S. Fukuda, K. Hara, H. Hayano, N. Higashi, E. Kako, H. Katagiri, Y. Kojima, Y. Kondo, T. Matsumoto, S. Michizono, T. Miura, H. Nakai, H. Nakajima, K. Nakanishi, S. Noguchi, N. Ohuchi, T. Saeki, M. Satoh, T. Shishido, T. Shidara, T. Takenaka, A. Terashima, N. Toge, K. Tsuchiya, K.Watanabe, S. Yamaguchi, A. Yamamoto, Y. Yamamoto, K. Yokoya, KEK (Japan) ALCPG11 meeting Global Design Effort

  4. S1-Global Cryomodule S1-Global Cryomodule (8 cavities) 2 FNAL 2 DESY 2 KEK 2 KEK INFN/Milano ALCPG11 meeting Global Design Effort

  5. Cavities, Tuners, Couplers in S1-G Cryomodule TESLA Cavity (DESY/FNAL) Tesla-like Cavity (KEK) Slide-Jack Tuner (KEK) Blade Tuner (FNAL) Saclay Tuner (DESY) Comparison of Performance TTF-III Coupler (DESY/FNAL) STF-II Coupler (KEK) ALCPG11 meeting Global Design Effort

  6. Vertical Test Results of 8 Cavities 2 cavities from FNAL 2 cavities from DESY 4 cavities from KEK 8 Cavities for S1-Global (ave. 30 MV/m) ALCPG11 meeting Global Design Effort

  7. Collaboration for Cryomodule Assembly Tuner assembly (2010, Feb.) Cavity string assembly (2010, Jan.) KEK Cavity string assembly (2010, Mar.) Coupler assembly (2010, Mar.) ALCPG11 meeting Global Design Effort

  8. Collaboration for Cryomodule Tests Cavity processing (2010, Sept.) Tuner performance tests (2010, July) Lorentz detuning tests (2010, Oct.) Dynamic loss meas. (2010, Nov.) ALCPG11 meeting Global Design Effort

  9. High power system in S1-Global Cryomodule-A 4 KEK cavities (MHI-05, MHI-06, MHI-07, MHI-09) 4 STF-II couplers (coaxial disk rf window, 60f ) Cryomodule-C FNAL (AES004, ACC011) cav. DESY (Z108, Z109) cavities 4 TTF-III couplers (cylindrical rf window, 40f ) ALCPG11 meeting Global Design Effort

  10. RF processing of input couplers Cryomodule-C /KLY#1 (2MW) Cryomodule-A /KLY#2 (5MW) 0.5 ms, 5 Hz, 500 kW 1.5 ms, 5 Hz, 200 kW Aug. 25 ~ Sept. 07 (10 days) ALCPG11 meeting Global Design Effort

  11. RF processing time of input couplers at room temperature Cryomodule-A (STF-II couplers) ave. processing time ~ 13 hours 20 hr Cryomodule-C (TTF-III couplers) ave. processing time ~ 21 hours 20 hr . Vacuum I/L ; 2.x10-4 Pa ALCPG11 meeting Global Design Effort

  12. Adjustment of frequency (f0 ) fo = 1299.92 MHz Cryomodule - A Cryomodule - C 1300.00MHz 1300.00MHz 1299.92MHz C2/ACC011; Tuner did not work. (A4/MHI-09;1299.91 MHz, limit) ALCPG11 meeting Global Design Effort

  13. QL of Variable Input Coupler QL = 2.4 x 106 D fbw = 542 Hz Cryomodule – A (STF-II couplers) Cryomodule – C (TTF-III couplers) 2.4 X 106 ALCPG11 meeting Global Design Effort

  14. Comparison of VT and CT Flat-top = 1.0 ms, 5 Hz Individual cavity test Vertical Test ave. 30 MV/m Cryomodule Test ave. 28 MV/m 2010’ Oct. 21 AES004 ACC011 Z108 Z109 MHI-05 MHI-07 MHI-06 MHI-09 FNAL DESY ALCPG11 meeting Global Design Effort

  15. Comparison of VT and CT ave. Eacc,max = 25.3 MV/m (Cryomodule-C) ave. Eacc,max = 30.4 MV/m (Cryomodule-A) Severe degradation of 9~12 MV/m in ACC011 (FNAL) Z108 (DESY) ALCPG11 meeting Global Design Effort

  16. Required rf power for 8-cav. operation Stable operating Eacc (individual cavity) Calc.ave. Eacc C : 25 MV/m A : 29 MV/m C&A : 27 MV/m 38 MV/m 33 MV/m 29 MV/m 26 MV/m 24 MV/m 23 MV/m 18 MV/m 20 MV/m AES004 ACC011 Z108 Z109 MHI-05 MHI-07 MHI-06 MHI-09 FNAL DESY KEK ALCPG11 meeting Global Design Effort

  17. 4-Cavity Operation in Cryomodule-C FB/on, Piezo/off, ave. Eacc = 22.5 MV/m 100Hz/div 50Hz/div 100Hz/div 50Hz/div C1/AES004 C2/ACC011 C3/Z108 C4/Z109 Eacc = 24.6 MV/m 21.3 MV/m 16.8 MV/m 27.0 MV/m ALCPG11 meeting Global Design Effort

  18. 4-Cavity Operation in Cryomodule-A FB/on, Piezo/off, ave. Eacc = 28.4 MV/m 100Hz/div 100Hz/div 50Hz/div 100Hz/div A1/MHI-05 A2/MHI-06 A3/MHI-07 A4/MHI-09 Eacc = 23.7 MV/m 25.6 MV/m 31.1 MV/m 23.0 MV/m ALCPG11 meeting Global Design Effort

  19. Frequency shift due to Lorentz detuning C4/Z109 (29MV/m) A2/MHI-06 (38MV/m) Pre-detuning by motor tuner & piezo tuner with DC voltage Rise Time Rise Time Flat Top Flat Top Compensation by piezo tuner in pulsed operation 200~500 Hz FB/on, Piezo/off 2~3 kHz FB/on, Piezo/off ALCPG11 meeting Global Design Effort

  20. Comparison of Detuning Frequency by LFD TESLA cavity Saclay tuner TESLA cavity Blade tuner Tesla-like cavity Slide-jack tuner AES004 Z108 Z109 MHI-05 MHI-07 ACC011 MHI-06 MHI-09 FNAL DESY KEK ALCPG11 meeting Global Design Effort

  21. 7-cavity operation in Cryomodule-C&A Ave. Eacc = 26.2 MV/m ; FB/on, Piezo/on, 1299.900 MHz C : ave. 25 MV/m 100Hz/div 100Hz/div 100Hz/div A : ave. 27 MV/m 200Hz/div 200Hz/div C2 : Detune 100Hz/div 100Hz/div C1 : 26 MV/m C3 : 18 MV/m C4 : 30 MV/m A1 : 16 MV/m A2 : 39 MV/m A3 : 34 MV/m A4 : 22 MV/m ALCPG11 meeting Global Design Effort

  22. 7-cavity operation in Cryomodule-C&A Ave. Eacc = 25.4 MV/m ; FB/on, Piezo/off, 1299.923 MHz 200Hz/div 200Hz/div 100Hz/div 100Hz/div A4 : Detune 200Hz/div 200Hz/div 100Hz/div C : ave. 23 MV/m A : ave. 29 MV/m C1 : 24 MV/m A1 : 15 MV/m C2 : 23 MV/m A2 : 38 MV/m C3 : 17 MV/m A3 : 33 MV/m C4 : 38 MV/m A4 : Detune ALCPG11 meeting Global Design Effort

  23. Comparison of cavity performance ave. Eacc,max VT : 30 MV/m 1 cav : 27 MV/m 7 cav : 26 MV/m Operating Eacc [MV/m] C D D AES004 ACC011 Z108 Z109 MHI-05 MHI-07 D : Detune C : Coupler MHI-06 MHI-09 FNAL DESY KEK ALCPG11 meeting Global Design Effort

  24. Summary • Achieved ave. 27 MV/m in cryomodule tests was 10% reduction from ave. 30 MV/m in vertical tests. • Ave. Eacc of 26 MV/m was successfully demonstrated in the 7-cavity operation by the vector-sum control. • Stable operation with a dynamic Lorentz-detuning compensation by a piezo tuner was achieved. • Two cavities showed the performance degradation of the Eacc,max from vertical tests to cryomodule tests. • Two frequency tuning systems did not work correctly. • Vacuum I/L in a warm coupler limited the performance. • For the next step: Disassembly of S1-Global cryomodule is scheduled in order to understand above troubles. ALCPG11 meeting Global Design Effort

  25. END Thank you for your attention......... ALCPG11 meeting Global Design Effort

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