1. TTC meeting, Milano Global Design Effort
High Power Tests in the S1-Global Cryomodule
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

2. TTC meeting, Milano Global Design Effort
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)
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

3. TTC meeting, Milano Global Design Effort
Collaborative work for Cryomodule Assembly
Tuner assembly (2010, Feb.)
Cavity string assembly (2010, Jan.)
KEK Cavity string assembly (2010, Mar.)
Coupler assembly (2010, Mar.)
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

4. TTC meeting, Milano Global Design Effort
Collaboration for Cryomodule Tests
Cavity processing (2010, Sept.)
Tuner performance tests (2010, July)
Lorentz detuning tests (2010, Oct.)
Dynamic loss meas. (2010, Nov.)
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

5. TTC meeting, Milano Global Design Effort
Outline
Cavity performance
Dynamic loss measurements
Lorentz detuning & Mechanical vibration
7-cavity operation by one Klystron
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

6. TTC meeting, Milano Global Design Effort
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)
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

7. TTC meeting, Milano Global Design Effort
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)
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

8. TTC meeting, Milano Global Design Effort
Comparison of cavity performance
ave. Eacc,max
VT : 30 MV/m
1 cav : 27 MV/m
7 cav : 26 MV/m C D D
AES004
ACC011
Z108
Z109
MHI-05
MHI-07
D : Detune
C : Coupler
MHI-06
MHI-09
FNAL
DESY
KEK
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

9. TTC meeting, Milano Global Design Effort
Comparison of cavity performance
Cryomodule - C
Cryomodule - A
Degradation
of Eacc,max
Tuner
Trouble
Coupler
Vacuum
Tuner
Trouble C1 C2 C3 C4 A1 A2 A3 A4 U
X-ray M
X-ray D
X-ray
Up-stream
Down-stream
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

10. TTC meeting, Milano Global Design Effort
Comparison of cavity performance
Degradation
of Eacc,max A1 A2 C1 C2
at 25MV/m A3 C4 A4 C3
at 25MV/m
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

11. TTC meeting, Milano Global Design Effort
Qo values measured by dynamic loss
7 cav. C4 A2 A2
4 cav. C1 A3
Dynamic loss at input coupler
(Detuning at 32 MV/m)
TTF-III : 0.5 W / 4 couplers
STF-II : 4.6 W / 4 couplers
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

12. TTC meeting, Milano Global Design Effort
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
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

13. TTC meeting, Milano Global Design Effort
Frequency shift due to Lorentz detuning
Cryomodule-C
Cryomodule-A
TESLA cavity + Blade tuner
Tesla-like cavity + Slide-jack tuner
Total : D f = -0.90, (Eacc)2
Rise Time : D f = -0.46, (Eacc)2
Flat Top : D f = -0.43, (Eacc)2
Total : D f = -0.70, (Eacc)2
Rise Time : D f = -0.56, (Eacc)2
Flat Top : D f = -0.14, (Eacc)2
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

14. TTC meeting, Milano Global Design Effort
Frequency shift due to Lorentz detuning
Cryomodule-C
Cryomodule-A
TESLA cavity + Saclay tuner
Tesla-like cavity + Slide-jack tuner
Total : D f = -1.22, (Eacc)2
Rise Time : D f = -0.49, (Eacc)2
Flat Top : D f = -0.73, (Eacc)2
Total : D f = -0.69, (Eacc)2
Rise Time : D f = -0.55, (Eacc)2
Flat Top : D f = -0.14, (Eacc)2
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

15. TTC meeting, Milano Global Design Effort
Comparison of Detuning Frequency by LFD
TESLA cavity
Blade tuner
TESLA cavity
Saclay tuner
Tesla-like cavity
Slide-jack tuner
AES004
Z108
Z109
MHI-05
MHI-07
ACC011
MHI-06
MHI-09
FNAL
DESY
KEK
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

16. TTC meeting, Milano Global Design Effort
Mechanical Vibration Modes by Piezo Sensors
1.5 ms,
5 Hz,
operation
A1/MHI-05
20 MV/m
A2/MHI-06
33 MV/m
A3/MHI-07
A4/MHI-09
33 MV/m
18 MV/m
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

17. TTC meeting, Milano Global Design Effort
4-Cavity Operation in Cryomodule-A
FB/on, Piezo/off, ave. Eacc = 28.4 MV/m
Dominant mechanical vibration mode
540Hz
220Hz
325Hz
210Hz
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
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

18. TTC meeting, Milano Global Design Effort
Mechanical Vibration Modes kicked by Piezo tuner
(Low RF Power meas.)
Vpiezo = +40V, 1 kHz (1 pulse)
C1/AES004
C2/ACC011
179Hz
204Hz
509Hz
345Hz
356Hz
260Hz
245, 252Hz
C3/Z108
C4/Z109
322Hz
313Hz
448Hz
436Hz
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

19. TTC meeting, Milano Global Design Effort
4-Cavity Operation in Cryomodule-C
FB/on, Piezo/off, ave. Eacc = 22.5 MV/m
Dominant mechanical vibration mode
179Hz
204Hz
260Hz
245Hz
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
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

20. TTC meeting, Milano Global Design Effort
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
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

21. TTC meeting, Milano Global Design Effort
7-cavity operation in Cryomodule-C&A
Ave. Eacc = 26.2 MV/m ; FB/on, Piezo/on, MHz
100Hz/div
C : ave. 25 MV/m
100Hz/div
100Hz/div
C2 :
Detune
A : ave. 27 MV/m
200Hz/div
200Hz/div
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
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

22. TTC meeting, Milano Global Design Effort
Stability of Detuning Frequency
Cryomodule - C
Piezo/on C1 C2
(Detune) C3 C4
12.4Hz
(rms)
33.2Hz
(rms)
38.6Hz
(rms) 2h
Cryomodule - A A1 A2 A3 A4
Piezo/on
4.6Hz
(rms)
7.3Hz
(rms)
7.3Hz
(rms)
9.9Hz
(rms)
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort

23. TTC meeting, Milano Global Design Effort
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) ' Feb 28
TTC meeting, Milano Global Design Effort

24. TTC meeting, Milano Global Design Effort
END
E. KAKO (KEK) ' Feb 28
TTC meeting, Milano Global Design Effort