high power tests in the s1-global cryomodule
DESCRIPTION
High Power Tests in the S1-Global Cryomodule. 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) - PowerPoint PPT PresentationTRANSCRIPT
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
Global Design Effort
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High Power Tests in the S1-Global Cryomodule
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
Global Design Effort
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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)
International Team for S1-Global
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Collaborative work for Cryomodule Assembly
Cavity string assembly (2010, Jan.)
Tuner assembly (2010, Feb.)
Coupler assembly (2010, Mar.)
KEK Cavity string assembly (2010, Mar.)
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Collaboration for Cryomodule Tests
Tuner performance tests (2010, July)
Cavity processing (2010, Sept.)
Lorentz detuning tests (2010, Oct.) Dynamic loss meas. (2010, Nov.)
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Outline• Cavity performance• Dynamic loss measurements• Lorentz detuning & Mechanical vibration• 7-cavity operation by one Klystron
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Blade Tuner (FNAL) Saclay Tuner (DESY)
Slide-Jack Tuner (KEK)
TTF-III Coupler (DESY/FNAL) STF-II Coupler (KEK)
TESLA Cavity (DESY/FNAL)Tesla-like Cavity (KEK)
Cavities, Tuners, Couplers in S1-G Cryomodule
Comparisonof
Performance
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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2 cavities from FNAL 2 cavities from DESY
8 Cavities for S1-Global (ave. 30 MV/m)4 cavities from KEK
Vertical Test Results of 8 Cavities
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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MHI-09MHI-07
MHI-06MHI-05AES004 ACC011 Z108 Z109
FNAL DESY KEK
Comparison of cavity performance ave. Eacc,max VT : 30 MV/m1 cav : 27 MV/m7 cav : 26 MV/m
D
C
D : DetuneC : Coupler
D
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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UX-ray
Cryomodule - C Cryomodule - A
DX-ray
MX-ray
C1 C2 C3 C4 A1 A2 A3 A4
Degradationof Eacc,max
TunerTroubleTuner
Trouble
CouplerVacuum
Up-stream Down-stream
Comparison of cavity performance
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Comparison of cavity performanceDegradationof Eacc,max
C2
C3
C4
C1
A1 A2
A3A4
at 25MV/m
at 25MV/m
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Qo values measured by dynamic loss
Dynamic loss at input coupler
(Detuning at 32 MV/m)TTF-III : 0.5 W / 4 couplersSTF-II : 4.6 W / 4 couplers
C1 A3
A2
A2
C4
4 cav.
7 cav.
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Frequency shift due to Lorentz detuning
C4/Z109 (29MV/m) A2/MHI-06 (38MV/m)
FB/on, Piezo/off FB/on, Piezo/off
Pre-detuningby motor tuner& piezo tunerwith DC voltage
Compensationby piezo tuner inpulsed operation
Flat TopFlat Top
Rise Time Rise Time
200~500 Hz 2~3 kHz
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Cryomodule-C Cryomodule-A
Total : f = -0.90, -0.83 (Eacc)2
Rise Time : f = -0.46, -0.31 (Eacc)2
Flat Top : f = -0.43, -0.51 (Eacc)2
TESLA cavity + Blade tuner Tesla-like cavity + Slide-jack tuner
Total : f = -0.70, -0.66 (Eacc)2
Rise Time : f = -0.56, -0.49 (Eacc)2
Flat Top : f = -0.14, -0.17 (Eacc)2
Frequency shift due to Lorentz detuning
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Frequency shift due to Lorentz detuning
Cryomodule-C Cryomodule-ATESLA cavity + Saclay tuner Tesla-like cavity + Slide-jack tuner
Total : f = -1.22, -1.00 (Eacc)2
Rise Time : f = -0.49, -0.41 (Eacc)2
Flat Top : f = -0.73, -0.59 (Eacc)2
Total : f = -0.69, -0.79 (Eacc)2
Rise Time : f = -0.55, -0.50 (Eacc)2
Flat Top : f = -0.14, -0.29 (Eacc)2
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Comparison of Detuning Frequency by LFD
MHI-09MHI-07
MHI-06MHI-05AES004
ACC011Z108 Z109
FNAL DESY KEK
TESLA cavityBlade tuner
TESLA cavitySaclay tuner
Tesla-like cavitySlide-jack tuner
A2/MHI-06
A3/MHI-07 A4/MHI-09
Mechanical Vibration Modes by Piezo Sensors
A1/MHI-05
20 MV/m
18 MV/m33 MV/m
33 MV/m
1.5 ms,5 Hz,operation
E. KAKO (KEK) 2011' Feb 28
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4-Cavity Operation in Cryomodule-AFB/on, Piezo/off, ave. Eacc = 28.4 MV/m
A1/MHI-05 A2/MHI-06 A3/MHI-07 A4/MHI-09
23.7 MV/m 25.6 MV/m 31.1 MV/m 23.0 MV/m
540Hz 220Hz 325Hz 210Hz
Dominant mechanical vibration mode
Eacc =
E. KAKO (KEK) 2011' Feb 28
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345Hz179Hz
509Hz356Hz
204Hz
Vpiezo = +40V, 1 kHz (1 pulse)
260Hz
322Hz
448Hz
245, 252Hz
313Hz436Hz
C1/AES004 C2/ACC011
C3/Z108 C4/Z109
Mechanical Vibration Modes kicked by Piezo tuner
(Low RF Power meas.)
E. KAKO (KEK) 2011' Feb 28
18TTC meeting, Milano Global Design Effort
4-Cavity Operation in Cryomodule-CFB/on, Piezo/off, ave. Eacc = 22.5 MV/m
C1/AES004 C2/ACC011 C3/Z108 C4/Z109
24.6 MV/m 21.3 MV/m 16.8 MV/m 27.0 MV/m
179Hz 204Hz 260Hz 245Hz
Dominant mechanical vibration mode
Eacc =
E. KAKO (KEK) 2011' Feb 28
19TTC meeting, Milano Global Design Effort
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Required rf power for 8-cav. operation
MHI-09MHI-07
MHI-06MHI-05AES004 ACC011 Z108 Z109
FNAL DESY KEK
26 MV/m
24 MV/m
18 MV/m
29 MV/m
20 MV/m
38 MV/m
33 MV/m
23 MV/m
Stable operating Eacc (individual cavity) Calc. ave. EaccC : 25 MV/mA : 29 MV/mC&A : 27 MV/m
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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7-cavity operation in Cryomodule-C&A
A1 : 16 MV/m A2 : 39 MV/m A3 : 34 MV/m A4 : 22 MV/m
C1 : 26 MV/m
C3 : 18 MV/m
C4 : 30 MV/m
C : ave. 25 MV/m
A : ave. 27 MV/m
Ave. Eacc = 26.2 MV/m ; FB/on, Piezo/on, 1299.900 MHz
100Hz/div 200Hz/div 200Hz/div 100Hz/div
100Hz/div 100Hz/div 100Hz/div
C2 : Detune
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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Stability of Detuning Frequency Cryomodule - C
Cryomodule - A
Piezo/on
Piezo/on
C1 C4C2(Detune)
C3
A1 A2 A3 A4
33.2Hz(rms)
12.4Hz(rms)
38.6Hz(rms)
4.6Hz(rms)
7.3Hz(rms)
7.3Hz(rms)
9.9Hz(rms)
2h
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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SUMMARY Ave. Eacc of 26 MV/m was successfully demonstrated in the 7-cavity operation by the vector-sum control. Two cavities showed the performance degradation of the Eacc,max from vertical tests to cryomodule tests. The x-rays radiation levels were higher than others. Two frequency tuning systems did not work correctly. Qo values measured by dynamic rf losses were lower than 1x1010 in each cavity. This cause might be due to electron loading with strong x-rays radiation. Frequency shifts by Lorentz detuning in the KEK cavities were much less than those in the TESLA-type cavities. This is due to the stiff structure in the KEK cavities. Stability of the detuning frequency in the KEK cavities was much better than those in the TESLA-type cavities.
E. KAKO (KEK) 2011' Feb 28 TTC meeting, Milano
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