MHI#16 号号号 号号号 2 EP2 Process log Status of working Monitor data during EP & Rinsing process Comparison of EP2 2011/5/10 ~ 5/16 : CP @flanges, EP2(5μm) under low current density, Improved 1 st Wate rushing @HOM & Flange using FM-20, Degreasing(FM-20, 2%) [1hour], rushing @Flange, HPR x 2 [10 hours], Assembly in C.R., Vacuum evacua eak check, Baking @100℃ (48hours) ion : Washing vacuum components with ultrasonic, Cleaning in C.R. : M. Sawabe, Kirk, M. Satoh (KEK), . Nakamura, N. Tasaki, F. Tsukada (Assist Engineering Co.), . Okada (K-VAC), . Asano, S. Imada, T. Yanagimachi (Nihon Advanced Technology) Kirk 1 STF Cavity Group Meeting @2011/5/16
MHI#16 号機の2回目の EP2. Period : 2011/5/10 ~ 5/16 Process : CP @flanges, EP2(5 μ m) under low current density, Improved 1 st Water Rinsing, Brushing @HOM & Flange using FM-20, Degreasing(FM-20, 2%) [1hour], Brushing @Flange, HPR x 2 [10 hours], Assembly in C.R., Vacuum evacuation, - PowerPoint PPT Presentation
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MHI#16号機の2回目のEP2 Process log
Status of working Monitor data during EP & Rinsing process Comparison of EP2
Period : 2011/5/10 ~ 5/16Process : CP @flanges, EP2(5μm) under low current density, Improved 1st Water Rinsing,
Brushing @HOM & Flange using FM-20, Degreasing(FM-20, 2%) [1hour],Brushing @Flange, HPR x 2 [10 hours], Assembly in C.R., Vacuum evacuation,Leak check, Baking @100℃ (48hours)
Preparation : Washing vacuum components with ultrasonic, Cleaning in C.R.Workers : M. Sawabe, Kirk, M. Satoh (KEK),
K. Nakamura, N. Tasaki, F. Tsukada (Assist Engineering Co.),T. Okada (K-VAC),M. Asano, S. Imada, T. Yanagimachi (Nihon Advanced Technology)
Kirk1
STF Cavity Group Meeting @2011/5/16
STF Cavity Group Meeting @2011/5/16
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• EP acid (4/20のサンプルを使用 )• Nb ingredient : 9.6g/ℓ• HF ingredient : 25 g/ℓ (全体 34g/ℓの 65%が反応に使われる )• Al ingredient : 18mg/ℓ• Current density : ~ 37mA/cm2 (最近の傾向より )• Cavity surface temperature : <35℃• Control Voltage : 温度と電流密度を見ながら制御• With normal N2 gas flow during extracting EP acid (8ℓ/min)
• 1st water rinsing (1.5hours)• Improved version (25ℓ/minで 20分間上下から流し続ける )• 1 分毎に1秒間水抜きを繰り返す (40分間 )• 最後の 30分は 10min (storing)/3min (flushing)で行う
5/10 9:40 Check every flange / Polishing input port by scotch bright 9:55~ Attachment of jigs for EP10:17 HPR operation starts without cavity10:44 Set cavity to EP bed with crane11:00 Installation of cathode bar to cavity [O.K.]11:04 Meeting for tomorrow’s working procedure11:12 Set data logger to cavity (totally 12ch)11:30 Leak check with N2 gas [O.K.]12:00 Lunch time13:20 HPR operation stops
Preparation for EP is completed14:00~ Vacuum parts rinsing with ultrasonic in C.R.15:30 fin.
STF Cavity Group Meeting @2011/5/16
5/11 10:10 Cavity rotation starts / EP acid flow starts10:30 EP2 starts10:47 EP2 stops [17m00s] / Idling rotation (3 rpm / 20min) / Plastic case detachment11:07 Idling rotation stops11:10 EP acid is removed from cavity with N2 gas flow(0.020MPa)11:23 First rinsing with ultra pure water starts12:54 First rinsing with ultra pure water stops [1h30m]13:00 Detachment of restriction jigs / Data logger detached13:20 Un-installation of cathode bar from cavity / washing cathode bar (No black mark)13:28 transferring cavity from EP bed to wagon / Checking inside cavity [O.K.]13:50 Detachment of jigs for EP / Detaching every blind teflon flange
/ Checking inside cavity (white mark is found at cell#9)14:00 Brushing at every flange and HOM couplers using FM-20 / Shower rinsing14:10 Checking inside cavity (white mark is found at cell#9)14:13 Attachment of flanges for degreasing14:23 Flowing FM-20 into cavity14:27 Degreasing with ultrasonic starts15:27 Degreasing with ultrasonic stops [1hour]15:30 Removing FM-20 from cavity15:40 Detachment of flanges for degreasing
Checking inside cavity (white mark is found at cell#9)15:45 Brushing at every flange using FM-20 / Shower rinsing
Process log ②
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STF Cavity Group Meeting @2011/5/16
5/11 16:00 Transferring cavity from wagon on turntable for HPR using crane16:05 Checking tolerance between position of nozzle and center of beam pipe16:19 1st HPR for inside cavity starts21:35 1st HPR for inside cavity stops [5h17m] (6 turns)21:40 Attaching every blank flange in C.R.22:09 fin.
5/12 9:08 HPR outside cavity with blind flanges starts [15mins] 9:24 2nd HPR for inside cavity with blind flanges starts13:47 2nd HPR for inside cavity with blind flanges stops [4h23m] (5 turns)13:55 Cavity enters into C.R.14:35 Assembly in C.R. (Class 10) starts16:20 Assembly in C.R. (Class 10) finishes / Moving out from Class10 to Class100016:34 Vacuum evacuation starts with heat guns16:45 Turbo pump status 100%17:15 Leak check thoroughly @~2.0x10-3Pa
Leak occurred at three ICF gaskets around bellows (Too low quality again!!!) Re-tightening screws / stop the leak / Re-leak check O.K.
17:45 Baking @100℃ startsMax Vacuum Level just after baking start : ~1.20 x 10-3Pa