High Power Test @S1-Global ④

High Power Test @S1-Global ④

1STF Cavity Group Meeting @2010/10/25

Process Log Data Summary of LFD Result of LFD Summary of LFD RF response @Quench

Kirk

Process Log of High Power Test①


10/5 13:00 Safety check for radiation in tunnel13:05 HV ON / TRG ON / RF ON13:48 Tuner set / RF conditioning of C1 starts13:53 X-ray emits @13.3MV/m17:14 RF Off by Arc #1 I/L @~217kW17:32 pulse width of flat-top : 100μs 1000μs17:52 RF Off by QL I/L @~28MV/m (Quench!)17:56 RF Off by QL I/L @~28MV/m (Quench!)18:00 F.B. ON18:25 RF Off by Vac. I/L18:33 LFD measurement by pulse shortening @27.2MV/m18:59 RF Off by QL I/L @~28MV/m (Quench!)

C1 : 27.2MV/m under condition of F.B. ON

C1 Cavity

Process Log of High Power Test②


10/6 13:26 HV ON / TRG ON13:35 RF ON14:30 LFD measurement by FNAL starts

Offset scanning / Delay scanning18:30 Piezo compensation by FNAL system starts

F.B. OffDAQ system did not work well.Retry tomorrow!

18:57 fin.

C1 Cavity

Process Log of High Power Test③


10/7 13:00 HV ON / TRG ON13:07 RF ON

Keep without F.B. @25MV/m13:30 RF Off by unknown reason14:30 Piezo compensation by FNAL system starts15:30 Piezo compensation + F.B. ON by FNAL starts15:50 Waveguide connection from C1 to C4 cavity16:05 HV ON / TRG ON / RF ON16:15 RF Off by QL I/L @~28MV/m (Quench!)16:27 RF Off by QL I/L @~27MV/m (Quench!)16:45 Piezo compensation by FNAL starts @28MV/m17:52 Piezo compensation + F.B. ON by FNAL starts @27.4MV/m18:55 fin.

C1 Cavity C4 Cavity

Process Log of High Power Test④


10/8 9:30 Waveguide connection from C4 to C3 cavity13:14 HV ON / TRG ON / RF ON13:25 Piezo compensation by FNAL starts @18.9MV/m14:15 F.B. ON14:20 RF Off by QL I/L @~19MV/m (Quench!)14:42 Piezo compensation + F.B. ON by FNAL starts @18.2MV/m15:00 Waveguide connection from C3 to C2 cavity15:16 HV ON / TRG ON / RF ON15:20 Piezo compensation by FNAL starts @22.6MV/m17:12 Piezo compensation + F.B. ON by FNAL starts @22.2MV/m18:57 fin.

C3 Cavity C2 Cavity

Process Log of High Power Test⑤


10/14 13:00 HV ON / TRG ON / RF ON14:16 Quench, but any I/L did not work, He pressure increasing

QL I/L was not set!14:33 RF On14:36 Piezo compensation by FNAL starts17:30 Piezo compensation + F.B. ON by FNAL starts

But, system did not work well18:55 fin.

C1, 2 Cavities

Process Log of High Power Test⑥


10/15 9:30 Waveguide connection from C1, 2 to C3, 4 cavity13:20 HV ON / TRG ON / RF ON

C4 detuned for LFD measurement of C314:09 F.B. ON14:18 Keep with F.B. ON @15MV/m16:22 LFD measurement by FNAL starts17:42 Change from C3 to C4 for LFD measurement

C3 detuned, C4 tuned17:57 LFD measurement by FNAL starts18:51 fin.

C1, 2 Cavities C3, 4 Cavities

Process Log of High Power Test⑦


10/13 9:35 Waveguide connection to A2(MHI#6) and C1(AES#4) cavities12:50 Refrigerator ready13:05 Safety check for radiation in tunnel13:10 HV ON / TRG ON / RF ON13:22 Tuner set / QL I/L worked (No I/L during tuner set)13:44 RF conditioning of A2 (MHI#6) starts / Vac. I/L worked (3x10-5Pa)14:00 RF Off by abnormal power supply of Klystron #2

Safety I/L by Door open in undergroundSafety check again

14:14 HV ON / TRG ON / RF ON14:32 RF Off by Vac. I/L (Level set : 3x10-5Pa 2x10-4Pa)15:18 RF Off by Arc #2 I/L @~35MV/m15:37 RF Off by Arc #2 I/L @453kW16:37 RF Off by Arc #2 I/L @453kW17:07 RF Off by Vac. I/L @453kW17:20 LFD measurement starts by FNAL @30MV/m18:05 I/L Level set : 2x10-4Pa 3x10-4Pa18:07 RF Off by QL I/L @40.0MV/m (Quench!)18:29 tuner set18:49 RF Off by QL I/L @37.7MV/m (Quench!)

A2 : 40.0MV/m under condition of Piezo ON (by FNAL) and F.B. Off

A2 Cavity

Process Log of High Power Test⑧


10/14 13:29 HV ON / TRG ON / Disable QL I/L13:39 RF ON / tuner set

RF conditioning of A3 (MHI#7) starts with pulse width = 100μsec

13:52 X-ray detected @13.4MV/m13:57 RF Off by Arc #3 I/L (~100kW)14:02 RF Off by Arc #3 I/L (~130kW)14:03 RF Off by Arc #3 I/L (~135kW)14:45 RF Off by Arc #3 I/L (~180kW) / Vac. I/L [3x10-4Pa 2x10-

4Pa]14:53 RF Off by Arc #3 I/L (~212kW)14:56 RF Off by Arc #3 I/L (~224kW)15:09 RF Off by Arc #3 I/L (~282kW)15:18 RF Off by Arc #3 I/L (~330kW)15:33 Quench with 100μs @33.5MV/m / RF Off by QL I/L15:46 Quench with 100μs @33.5MV/m / RF Off by QL I/L15:47 pulse width of flat-top : 100μs 1000μs16:24 RF Off by Arc #3 I/L (~300kW)16:31 Quench with 1000μs @31.3MV/m / RF Off by QL I/L16:52 Quench with 1000μs @31.8MV/m / RF Off by QL I/L

A3 Cavity

Process Log of High Power Test⑨


10/14 17:00 F.B. ON17:25 RF Off by QL I/L (Not Quench, due to noise)17:28 RF Off by QL I/L (Not Quench, due to noise)17:31 RF Off by QL I/L (Not Quench, due to noise)17:40 RF Off by QL I/L (Not Quench, due to noise) [1.8x106

1.5x106]17:56 RF Off by QL I/L @32MV/m18:04 RF Off by QL I/L (Not Quench) [1.5x106 1.3x106]18:14 LFD measurement by pulse shortening @31.7MV/m

Miss-data taking due to cPCI1, not cPCI218:42 RF Off by Arc #2 I/L (~390kW)18:45 2000 pulses stored under F.B. ON @31.7MV/m18:57 fin.

A3 : 31.7MV/m under condition of F.B. ON

A3 Cavity

Process Log of High Power Test⑩


10/15 13:35 HV ON / RF ON / QL I/L system renewal (but, not good)14:20 LFD measurement by FNAL starts (Offset scanning)15:34 Delay scanning starts @25MV/m16:20 LFD measurement by FNAL finishes13:46 RF Off by Vac. I/L16:35 F.B. ON17:09 RF Off by Arc #3 I/L17:10 RF Off by QL I/L x 217:23 LFD measurement by pulse shortening @31.7MV/m18:00 10,000 pulses data taking for A3 @31.7MV/m18:51 fin.

A3 Cavity

STF Cavity Group Meeting @2010/10/25

10/19 9:20 Waveguide connection from A3 to A1 cavity13:00 Safety check for radiation in tunnel13:17 HV ON / TRG ON / RF ON

Abnormal tuner position on operation panel appears

Network error for IOC13:33 A1(MHI#5) conditioning starts13:51 electron detected from end of beampipe @8.6MV/m13:59 RF Off by QL I/L14:04 RF Off by QL I/L14:11 RF off by Arc #114:13 RF Off by QL I/L @19.3MV/m14:19 RF Off by Arc #1 @120kW14:21 RF Off by Arc #1 @118kW15:03 RF Off by Arc #1 @~140kW15:13 RF Off by Arc #1 @154kW15:35 RF Off by QL I/L15:49 RF Off by Arc #1 x 216:09 RF Off by Arc #1 @215kW16:18 RF Off by Arc #116:25 RF Off by Arc #116:40 RF Off by QL I/L16:59 RF Off by QL I/L @29.0MV/m

A1 Cavity

Process Log of High Power Test⑪

12


10/19 17:00 pulse width of flat-top : 100μs 1000μs17:05 QL I/L : 0.8 x 106 1.3 x 106

17:30 RF Off by QL I/L (Quench) @27Mv/m17:34 RF Off by QL I/L (Quench) @27Mv/m17:36 RF Off by Arc #1

F.B. ONRF Off by Pf I/L

18:31 LFD measurement by pulse shortening @28.0MV/m18:54 RF Off by QL I/L (Quench) @28.5Mv/m18:56 fin.

A1 Cavity

Process Log of High Power Test⑫

13


10/20 9:20 Waveguide connection from A1 to A4 cavity13:00 Safety check for radiation in tunnel

Set f0 to 1299.900MHz, because of tuner trouble13:17 HV ON / TRG ON / RF ON / QL I/L = 1.4 x 106

14:00 A4(MHI#9) conditioning starts14:03 RF Off by QL I/L @10MV/m14:10 RF off by Arc #4 @56kW14:11 RF Off by QL I/L @13MV/m14:14 RF off by Arc #4 @68kW14:20 RF off by Arc #414:21 RF Off by QL I/L14:14 RF off by Arc #414:42 RF off by Arc #4 x 415:13 RF Off by QL I/L x 4 @~23MV/m15:25 pulse width of flat-top : 100μs 1000μs15:48 RF off by Arc #416:13 RF Off by QL I/L @23.3MV/m16:16 RF Off by QL I/L @23.3MV/m16:18 RF Off by QL I/L @23.1MV/m

A4 Cavity

Process Log of High Power Test⑬

14

Quench!!


10/20 16:22 F.B. ON (Not smooth introduction!)RF Off by Pf

RF off by Arc #4RF Off by Pf

16:36 RF Off by QL I/L @21.9MV/m16:40 RF Off by QL I/L @21.4MV/m16:44 RF Off by QL I/L16:47 RF Off by QL I/L @20.9MV/m (Quench field gradually

decreasing)16:55 RF Off by QL I/L @20.2MV/m17:03 LFD measurement by pulse shortening @19.1MV/m

RF Off by QL I/L many timesDuring measurement, liquid helium became empty,

because A4 is set to downstream of CM-ANot continued to measureRestarting helium transfer, but taking long time

17:30 fin.

A4 Cavity

Process Log of High Power Test⑭

15


10/21 14:00 HV ON (Waiting longer than usual)14:04 RF ON / F.B. ON / tuner set14:19 TRG Off / HV Off (C4 had quench and helium pressure

increased)15:29 HV ON / TRG ON / RF ON / F.B. ON (wait for 1 hour)15:37 RF Off by QL I/L @21.0MV/m15:50 RF Off by QL I/L16:04 RF Off by QL I/L (?)16:21 RF Off by Pf

16:31 RF Off by QL I/L (?)16:35 RF Off by Pf

16:38 RF Off by QL I/L (?)It is necessary to set lower gradient, once RF Off

occurs16:44 RF Off by QL I/L @24MV/m17:10 LFD measurement by pulse shortening @23.3MV/m17:39 15,000 pulses data taking @23.3MV/m19:00 fin.

A4 Cavity

Process Log of High Power Test⑮

16


10/22 9:00 Waveguide connection from A4 to A2 cavity 9:40 Refrigerator trouble for turbine

It was hard to recover it immediatelyGive up high power test today

10/25 12:00 Refrigerator system recovered!Operation restartsCavities will reach 2K by 18:00 tomorrow

A2 Cavity

Process Log of High Power Test⑯

17

Comparison of Achievable Gradient between Vertical Test and Cryomodule Test


18

Evaluation for LFD @S1-Global


Pulse-cut method１００パルスの平均値と R.M.S.から求める。 flat-topのみと全パルス幅での時間領域に分けて評価する。微分方程式から求めた結果と比較する。Brandt氏の方法による結果と比較する。

Long time operation2,000パルスの結果からmicro phonicsの影響を評価する。10,000(15,000)パルスの結果を用いて評価する（一部）。Q0測定中の長時間データから評価する（最適条件）。Piezoの有り無しでの変化を評価する。１空洞、４空洞、８空洞運転での変化を評価する。

Data Summary of LFD @S1-Global①


Cavity Date Type Gradient F.B. Piezo # of pulse

C1 (AES#4) 2010/10/5

pulse-cut 27.2 ON Off 100

2010/10/7

FNAL 25.6 Off ON 100


FNAL 27.1 Off ON 2,000

FNAL 27.0 ON ON 100

27.0 ON Off 100

C2 (ACC#11) 2010/9/29


2010/10/8

FNAL 22.6 Off ON (no iter.)

2,000

FNAL 22.2 ON ON (no iter.)

2,000

C3 (ZANON#108)

2010/9/30


2010/10/8

FNAL 18.9 Off ON 2,000

FNAL 18.2 ON ON 2,000

2010/10/15

long time 15.0 ON Off 2,000

C4 (ZANON#109)

2010/10/1




FNAL 27.4 ON ON 2,000

25.0 ON Off 100

Data Summary of LFD @S1-Global②


Cavity Date Type Gradient F.B. Piezo # of pulse

A1 (MHI#5) 2010/10/19


A2 (MHI#6) 2010/9/24



A3 (MHI#7) 2010/10/14


2010/10/15



A4 (MHI#9) 2010/10/20

pulse-cut(interruption)

19.1 ON Off 100

2010/10/21


long time 23.3 ON Off ~4,000 (1Hz)

long time 23.3 ON Off 15,000 (2~3Hz)

※A4空洞の 10/20のデータは途中でヘリウムが無くなったため中断した。


Result of LFD for AES#4 @S1-Global

22

27.2MV/m (F.B. ON)

336Hz708Hz


Result of LFD for ACC#11 @S1-Global

23

22.0MV/m (F.B. ON)230Hz

478Hz


Result of LFD for Z#108 @S1-Global

24

18.0MV/m (F.B. ON)

245Hz440Hz


Result of LFD for Z#109 @S1-Global

25

29.2MV/m (F.B. ON)

552Hz1003Hz


Result of LFD for MHI#5 @S1-Global

26

28.0MV/m (F.B. ON)

83Hz436Hz



27

34.2MV/m (F.B. ON)

183Hz710Hz 183Hz710Hz



28

31.7MV/m (F.B. ON)

131Hz558Hz



29

23.3MV/m (F.B. ON)

180Hz399Hz


A1MHI#5

A2MHI#6

A3MHI#7

A4MHI#9

C1AES#4

C2ACC#11

C3ZANON

#108

C4ZANON

#109

Gradient [MV/m]

28.0 34.2(31.5)

31.7 23.3 27.2 22.0 18.0 29.2(28.5)

△fdetuned (total)

[Hz]

436 710 558 399 708 478 440 1003

△fdetuned (rise-up)

[Hz]

353 527 427 219 372 248 195 451

△fdetuned (only flat-

top) [Hz]

83 183 131 180 336 230 245 552

QL(High Power)

[x106]

2.55 2.50 2.42 2.31 2.32 2.34 2.37 2.43

QL(Low Power)

[x106]

2.41 2.41 2.40 2.41 2.40 2.40 2.41 2.40

Average[pulses]

100 100 100 100 100 100 100 100

Summary of Lorentz Force Detuning

Comparison of LFD between Phase-1 and S1-Global


31


Long time operation for Z108 @15.0MV/m①

32

F.B. ONで 15.0MV/mキープ状態で15分ほどの間に測定された結果。（解析の際の fitting rangeは同じ）

QLも Δf も共に安定している。

2,000パルスのデータを取得した。


Long time operation for Z108 @31.7MV/m②

33

2,000パルスのヒストグラムの結果。


Long time operation for A3 @31.7MV/m①

34

~1.0hour

F.B. ONで 31.7MV/mキープ状態で１時間ほどの間に測定された結果。（解析の際の fitting rangeは同じ）

QLに関しては、徐々に減少していく様子が見てとれる。数値が下がるということは、パルスエンドの傾きがなだらかになっていくことを意味する。何らかのノイズの影響が入りこんでいるのか？

Δf の方も同様に中心値が下がっていく様子が見てとれるが、たかだか 10Hz程度である。



Long time operation for A3 @31.7MV/m②

35



Long time operation for A4 @23.3MV/m①

36

1.5hourF.B. ONで 23.3MV/mキープ状態で１時間半ほどの間に測定された結果。（解析の際の fitting rangeは同じ）

QLに関しては、徐々に減少していく様子が今回も見てとれる。何か共通の原因があるのか？

Δf の方は、振幅が徐々に拡がっていく様子が見てとれる。この間のヘリウム圧はほぼ一定であり、別なメカニズムに因り空洞周波数の振る舞いが揺れ動いていることを意味する。この振る舞いは前回には見られなかったものである。

15,000パルスのデータを取っていた時間帯



Long time operation for A4 @23.3MV/m②

37



Long time operation for A4 @23.3MV/m③

38


Long time operation for A4 @23.3MV/m④

39


Long time operation for A4 @23.3MV/m⑤

40


Long time operation for A4 @23.3MV/m⑥

41


Long time operation for A4 @23.3MV/m⑦

42

100パルス毎の重ね合わせ図

VC Feedback systemはよく機能している

Eaccの変動はたかだか 0.4%程度である


Long time operation for A4 @23.3MV/m⑧

43

100パルス毎の重ね合わせ図

Documents

High Power Test @S1-Global ④