High Power ④ 1 STF Cavity Group Process Log Data Summary of LFD Result of LFD Summary of LFD RF Kirk

Process Log of High Power Test ① 2 STF Cavity Group 10/513:00Safety check for radiation in tunnel 13:05HV ON / TRG ON / RF ON 13:48Tuner set / RF conditioning of C1 starts 13:53X-ray 17:14RF Off by Arc #1 17:32pulse width of flat-top : 100μs  1000μs 17:52RF Off by Q L (Quench!) 17:56RF Off by Q L (Quench!) 18:00F.B. ON 18:25RF Off by Vac. I/L 18:33LFD measurement by pulse 18:59RF Off by Q L (Quench!) C1 : 27.2MV/m under condition of F.B. ON C1 Cavity

Process Log of High Power Test ② 3 STF Cavity Group 10/613:26HV ON / TRG ON 13:35RF ON 14:30LFD measurement by FNAL starts Offset scanning / Delay scanning 18:30Piezo compensation by FNAL system starts F.B. Off DAQ system did not work well. Retry tomorrow! 18:57fin. C1 Cavity

Process Log of High Power Test ③ 4 STF Cavity Group 10/713:00HV ON / TRG ON 13:07RF ON Keep without 13:30RF Off by unknown reason 14:30Piezo compensation by FNAL system starts 15:30Piezo compensation + F.B. ON by FNAL starts 15:50Waveguide connection from C1 to C4 cavity 16:05HV ON / TRG ON / RF ON 16:15RF Off by Q L (Quench!) 16:27RF Off by Q L (Quench!) 16:45Piezo compensation by FNAL 17:52Piezo compensation + F.B. ON by FNAL 18:55fin. C1 Cavity  C4 Cavity

Process Log of High Power Test ④ 5 STF Cavity Group 10/8 9:30Waveguide connection from C4 to C3 cavity 13:14HV ON / TRG ON / RF ON 13:25Piezo compensation by FNAL 14:15F.B. ON 14:20RF Off by Q L (Quench!) 14:42Piezo compensation + F.B. ON by FNAL 15:00Waveguide connection from C3 to C2 cavity 15:16HV ON / TRG ON / RF ON 15:20Piezo compensation by FNAL 17:12Piezo compensation + F.B. ON by FNAL 18:57fin. C3 Cavity  C2 Cavity

Process Log of High Power Test ⑤ 6 STF Cavity Group 10/1413:00HV ON / TRG ON / RF ON 14:16Quench, but any I/L did not work, He pressure increasing Q L I/L was not set! 14:33RF On 14:36Piezo compensation by FNAL starts 17:30Piezo compensation + F.B. ON by FNAL starts But, system did not work well 18:55fin. C1, 2 Cavities

Process Log of High Power Test ⑥ 7 STF Cavity Group 10/15 9:30Waveguide connection from C1, 2 to C3, 4 cavity 13:20HV ON / TRG ON / RF ON C4 detuned for LFD measurement of C3 14:09F.B. ON 14:18Keep with F.B. 16:22LFD measurement by FNAL starts 17:42Change from C3 to C4 for LFD measurement C3 detuned, C4 tuned 17:57LFD measurement by FNAL starts 18:51fin. C1, 2 Cavities  C3, 4 Cavities

Process Log of High Power Test ⑦ 8 STF Cavity Group 10/13 9:35Waveguide connection to A2(MHI#6) and C1(AES#4) cavities 12:50Refrigerator ready 13:05Safety check for radiation in tunnel 13:10HV ON / TRG ON / RF ON 13:22Tuner set / Q L I/L worked (No I/L during tuner set) 13:44RF conditioning of A2 (MHI#6) starts / Vac. I/L worked (3x10 -5 Pa) 14:00RF Off by abnormal power supply of Klystron #2 Safety I/L by Door open in underground Safety check again 14:14HV ON / TRG ON / RF ON 14:32RF Off by Vac. I/L (Level set : 3x10 -5 Pa  2x10 -4 Pa) 15:18RF Off by Arc #2 15:37RF Off by Arc #2 16:37RF Off by Arc #2 17:07RF Off by Vac. 17:20LFD measurement starts by 18:05I/L Level set : 2x10 -4 Pa  3x10 -4 Pa 18:07RF Off by Q L (Quench!) 18:29tuner set 18:49RF Off by Q L (Quench!) A2 : 40.0MV/m under condition of Piezo ON (by FNAL) and F.B. Off A2 Cavity

Process Log of High Power Test ⑧ 9 STF Cavity Group 10/1413:29HV ON / TRG ON / Disable Q L I/L 13:39RF ON / tuner set RF conditioning of A3 (MHI#7) starts with pulse width = 100μsec 13:52X-ray 13:57RF Off by Arc #3 I/L (~100kW) 14:02RF Off by Arc #3 I/L (~130kW) 14:03RF Off by Arc #3 I/L (~135kW) 14:45RF Off by Arc #3 I/L (~180kW) / Vac. I/L [3x10 -4 Pa  2x10 -4 Pa] 14:53RF Off by Arc #3 I/L (~212kW) 14:56RF Off by Arc #3 I/L (~224kW) 15:09RF Off by Arc #3 I/L (~282kW) 15:18RF Off by Arc #3 I/L (~330kW) 15:33Quench with / RF Off by Q L I/L 15:46Quench with / RF Off by Q L I/L 15:47pulse width of flat-top : 100μs  1000μs 16:24RF Off by Arc #3 I/L (~300kW) 16:31Quench with / RF Off by Q L I/L 16:52Quench with / RF Off by Q L I/L A3 Cavity

Process Log of High Power Test ⑨ 10 STF Cavity Group 10/1417:00F.B. ON 17:25RF Off by Q L I/L (Not Quench, due to noise) 17:28RF Off by Q L I/L (Not Quench, due to noise) 17:31RF Off by Q L I/L (Not Quench, due to noise) 17:40RF Off by Q L I/L (Not Quench, due to noise) [1.8x10 6  1.5x10 6 ] 17:56RF Off by Q L 18:04RF Off by Q L I/L (Not Quench) [1.5x10 6  1.3x10 6 ] 18:14LFD measurement by pulse Miss-data taking due to cPCI1, not cPCI2 18:42RF Off by Arc #2 I/L (~390kW) 18: pulses stored under F.B. 18:57fin. A3 : 31.7MV/m under condition of F.B. ON A3 Cavity

Process Log of High Power Test ⑩ 11 STF Cavity Group 10/1513:35HV ON / RF ON / Q L I/L system renewal (but, not good) 14:20LFD measurement by FNAL starts (Offset scanning) 15:34Delay scanning 16:20LFD measurement by FNAL finishes 13:46RF Off by Vac. I/L 16:35F.B. ON 17:09RF Off by Arc #3 I/L 17:10RF Off by Q L I/L x 2 17:23LFD measurement by pulse 18:0010,000 pulses data taking for 18:51fin. A3 Cavity

STF Cavity Group 10/19 9:20Waveguide connection from A3 to A1 cavity 13:00Safety check for radiation in tunnel 13:17HV ON / TRG ON / RF ON Abnormal tuner position on operation panel appears  Network error for IOC 13:33A1(MHI#5) conditioning starts 13:51electron detected from end of 13:59RF Off by Q L I/L 14:04RF Off by Q L I/L 14:11RF off by Arc #1 14:13RF Off by Q L 14:19RF Off by Arc 14:21RF Off by Arc 15:03RF Off by Arc 15:13RF Off by Arc 15:35RF Off by Q L I/L 15:49RF Off by Arc #1 x 2 16:09RF Off by Arc 16:18RF Off by Arc #1 16:25RF Off by Arc #1 16:40RF Off by Q L I/L 16:59RF Off by Q L A1 Cavity Process Log of High Power Test ⑪ 12

STF Cavity Group 10/1917:00pulse width of flat-top : 100μs  1000μs 17:05Q L I/L : 0.8 x 10 6  1.3 x :30RF Off by Q L I/L 17:34RF Off by Q L I/L 17:36RF Off by Arc #1 F.B. ON RF Off by P f I/L 18:31LFD measurement by pulse 18:54RF Off by Q L I/L 18:56fin. A1 Cavity Process Log of High Power Test ⑫ 13

STF Cavity Group 10/20 9:20Waveguide connection from A1 to A4 cavity 13:00Safety check for radiation in tunnel Set f 0 to MHz, because of tuner trouble 13:17HV ON / TRG ON / RF ON / Q L I/L = 1.4 x :00A4(MHI#9) conditioning starts 14:03RF Off by Q L 14:10RF off by Arc 14:11RF Off by Q L 14:14RF off by Arc 14:20RF off by Arc #4 14:21RF Off by Q L I/L 14:14RF off by Arc #4 14:42RF off by Arc #4 x 4 15:13RF Off by Q L I/L x 15:25pulse width of flat-top : 100μs  1000μs 15:48RF off by Arc #4 16:13RF Off by Q L 16:16RF Off by Q L 16:18RF Off by Q L A4 Cavity Process Log of High Power Test ⑬ 14 Quench!!

STF Cavity Group 10/2016:22F.B. ON (Not smooth introduction!) RF Off by P f RF off by Arc #4 RF Off by P f 16:36RF Off by Q L 16:40RF Off by Q L 16:44RF Off by Q L I/L 16:47RF Off by Q L (Quench field gradually decreasing) 16:55RF Off by Q L 17:03LFD measurement by pulse RF Off by Q L I/L many times During measurement, liquid helium became empty, because A4 is set to downstream of CM-A Not continued to measure Restarting helium transfer, but taking long time 17:30fin. A4 Cavity Process Log of High Power Test ⑭ 15

STF Cavity Group 10/2114:00HV ON (Waiting longer than usual) 14:04RF ON / F.B. ON / tuner set 14:19TRG Off / HV Off (C4 had quench and helium pressure increased) 15:29HV ON / TRG ON / RF ON / F.B. ON (wait for 1 hour) 15:37RF Off by Q L 15:50RF Off by Q L I/L 16:04RF Off by Q L I/L (?) 16:21RF Off by P f 16:31RF Off by Q L I/L (?) 16:35RF Off by P f 16:38RF Off by Q L I/L (?) It is necessary to set lower gradient, once RF Off occurs 16:44RF Off by Q L 17:10LFD measurement by pulse 17:3915,000 pulses data 19:00fin. A4 Cavity Process Log of High Power Test ⑮ 16

STF Cavity Group 10/22 9:00Waveguide connection from A4 to A2 cavity 9:40Refrigerator trouble for turbine It was hard to recover it immediately Give up high power test today 10/2512:00Refrigerator system recovered! Operation restarts Cavities will reach 2K by 18:00 tomorrow A2 Cavity Process Log of High Power Test ⑯ 17

Comparison of Achievable Gradient between Vertical Test and Cryomodule Test STF Cavity Group 18

Evaluation for 19 STF Cavity Group  Pulse-cut method  １００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 operation  2,000 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）。  Q 0 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 ① 20 STF Cavity Group CavityDateTypeGradientF.B.Piezo# of pulse C1 (AES#4)2010/10/5pulse-cut27.2ONOff /10/7FNAL25.6OffON100 FNAL27.0OffON100 FNAL27.1OffON2,000 FNAL27.0ON ONOff100 C2 (ACC#11)2010/9/29pulse-cut22.0ONOff /10/8FNAL22.6OffON (no iter.)2,000 FNAL22.2ONON (no iter.)2,000 C3 (ZANON#108)2010/9/30pulse-cut18.0ONOff /10/8FNAL18.9OffON2,000 FNAL18.2ON 2, /10/15long time15.0ONOff2,000 C4 (ZANON#109)2010/10/1pulse-cut28.5ONOff100 pulse-cut29.2ONOff100 FNAL28.0OffON100 FNAL27.4ON 2, ONOff100

Data Summary of ② 21 STF Cavity Group CavityDateTypeGradientF.B.Piezo# of pulse A1 (MHI#5)2010/10/19pulse-cut28.0ONOff100 A2 (MHI#6)2010/9/24pulse-cut31.5ONOff100 pulse-cut34.2ONOff100 A3 (MHI#7)2010/10/14long time31.7ONOff2, /10/15pulse-cut31.7ONOff100 long time31.7ONOff10,000 A4 (MHI#9)2010/10/20pulse-cut (interruption) 19.1ONOff /10/21pulse-cut23.3ONOff100 long time23.3ONOff~4,000 (1Hz) long time23.3ONOff15,000 (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。

STF Cavity Group Result of LFD for MV/m (F.B. ON) 336Hz 708Hz

STF Cavity Group Result of LFD for MV/m (F.B. ON) 230Hz 478Hz

STF Cavity Group Result of LFD for MV/m (F.B. ON) 245Hz440Hz

STF Cavity Group Result of LFD for MV/m (F.B. ON) 552Hz1003Hz

STF Cavity Group Result of LFD for MV/m (F.B. ON) 83Hz 436Hz

STF Cavity Group Result of LFD for MV/m (F.B. ON) 183Hz 710Hz 183Hz 710Hz

STF Cavity Group Result of LFD for MV/m (F.B. ON) 131Hz 558Hz

STF Cavity Group Result of LFD for MV/m (F.B. ON) 180Hz 399Hz

30 STF Cavity Group A1 MHI#5 A2 MHI#6 A3 MHI#7 A4 MHI#9 C1 AES#4 C2 ACC#11 C3 ZANON #108 C4 ZANON #109 Gradient [MV/m] (31.5) (28.5) △ f detuned (total) [Hz] △ f detuned (rise-up) [Hz] △ f detuned (only flat-top) [Hz] Q L (High Power) [x10 6 ] Q L (Low Power) [x10 6 ] Average [pulses] 100 Summary of Lorentz Force Detuning

Comparison of LFD between Phase-1 and S1-Global STF Cavity Group 31

STF Cavity Group Long time operation for ① 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） Q L 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。

STF Cavity Group Long time operation for ② 33 2,000 パルスのヒストグラムの結果。

STF Cavity Group Long time operation for ① 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） Q L 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。 10,000 パルスのデータを取得した。

STF Cavity Group Long time operation for ② 35 10,000 パルスのヒストグラムの結果。

STF Cavity Group Long time operation for ① hour F.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） Q L 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 15,000 パルスのデータを取得した。

STF Cavity Group Long time operation for ② 37 15,000 パルスのヒストグラムの結果。

STF Cavity Group Long time operation for ③ 38

STF Cavity Group Long time operation for ④ 39

STF Cavity Group Long time operation for ⑤ 40

STF Cavity Group Long time operation for ⑥ 41

STF Cavity Group Long time operation for ⑦ パルス毎の重ね合わせ図 V C Feedback system はよく機能している E acc の変動はたかだか 0.4% 程度である

STF Cavity Group Long time operation for ⑧ パルス毎の重ね合わせ図