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MHI#10 号機の pre-EP と EP1

MHI#10 号機の pre-EP と EP1. Process log Status of working Result of pre-EP/EP1 Comparison of EP1 between MHI#10 and #11. Period : 2010/3/8 ～ 3/15 Process : CP @flanges, pre-EP(5 μ m), EP1(100 μ m), Degreasing(FM-20), HPR(2hours) Workers : M. Sawabe, Kirk, M. Satoh (KEK),

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MHI#10 号機の pre-EP と EP1

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  1. MHI#10号機のpre-EPとEP1 Process log Status of working Result of pre-EP/EP1 Comparison of EP1 between MHI#10 and #11 Period : 2010/3/8 ～ 3/15 Process : CP @flanges, pre-EP(5μm), EP1(100μm), Degreasing(FM-20), HPR(2hours) Workers : M. Sawabe, Kirk, M. Satoh (KEK), K. Nakamura, N. Tasaki, F. Tsukada (Assist Engineering Co.), T. Okada (K-VAC) STF Cavity Group Meeting @2010/3/15 Kirk

  2. Process log ① 3/8 18:15 MHI#10 moves from V.T. area to EP area 3/9 9:55 check every flange / polish every flange except for input port 10:26~ CP @flanges 10:30~ Attachment of jigs for EP / found several scratches on one beam pipe flange 11:39 Set cavity to EP bed with crane 13:00 Installation of cathode bar to cavity 13:21 Pressure test with N2 gas 13:31 Meeting for tomorrow’s working procedure 3/10 9:00 preparation working starts 10:23 pre-EP starts 11:24 pre-EP stops [1:01] / Idling rotation starts (3 rpm) 11:34 Idling rotation stops 11:36 EP acid is removed from cavity 11:56 First rinsing with ultra pure water starts 13:27 First rinsing with ultra pure water stops [1:30] 13:36 Detachment of restriction jigs 13:44 Un-installation of cathode bar from cavity / washing cathode bar 13:57 transferring cavity from EP bed to wagon 14:04 Detachment of jigs for EP / Detaching every blind flanges (black deposit was found on Teflon flange / cleaning Teflon flanges) 14:12 Shower rinsing starts in CP room 14:26 Shower rinsing stops / Checking every flange [O.K.] / Checking inside cavity (No marks) [O.K.] / No smell STF Cavity Group Meeting @2010/3/15

  3. Process log ② 3/10 14:29 re-attachment of jigs for EP 14:51 Set cavity to EP bed with crane 15:30 Installation of cathode bar to cavity 15:43 Pressure test with N2 gas 15:50 Attachment temperature sensors to cavity / Setting cooling fan 3/11 8:49 cavity rotation starts 8:55 EP acid cycle starts in reservoir / EP acid level was higher than nominal / adjustment of acid flow rate 9:11 EP1 starts 13:29 EP1 stops [4:21] / Idling rotation (3 rpm) 13:49 Idling rotation stops 13:50 EP acid is removed from cavity 14:16 First rinsing with ultra pure water starts / It takes 2 minutes for overflow 15:48 First rinsing with ultra pure water stops [1:30] 15:56 Detachment of restriction jigs 16:04 Un-installation of cathode bar from cavity / washing cathode bar 16:22 transferring cavity from EP bed to wagon 16:45 Detachment of jigs for EP / Detaching every blind flanges (black deposit was found on Teflon flange again / cleaning Teflon flanges) 16:53 Shower rinsing starts in CP room 17:03 Shower rinsing stops / Checking every flange (probe port was attacked by EP acid) / Checking inside cavity (white stain on beam pipe) / No smell STF Cavity Group Meeting @2010/3/15

  4. Process log ③ 3/11 17:10 Attachment of jigs for degreasing 17:17 Flowing FM-20 into cavity 17:23 Degreasing with ultrasonic starts 18:22 Degreasing with ultrasonic stops [1:00] 18:25 Removing FM-20 from cavity 18:30 Detachment of jigs for degreasing 18:40 Shower rinsing in CP room 18:56 set to HPR turn table 19:04 Checking tolerance between position of nozzle and center of beam pipe 19:10 HPR for inside cavity starts 21:04 HPR for inside cavity stops by manual control [2:04] keep in HPR room by next Monday 21:18 fin. 3/15 9:00 take out from HPR room 14:30 transfer from STF to workshop for annealing STF Cavity Group Meeting @2010/3/15

  5. Status of working ① Attachment of EP jigs Setting on EP bed CP @flanges 伸縮天井 STF Cavity Group Meeting @2010/3/15 Inserting cathode bar

  6. Status of working ② ビームパイプのマスキング pre-EP後の状況 黒い染みは磨いて落とす STF Cavity Group Meeting @2010/3/15

  7. Status of working ③ カソードバッグが硫黄で汚れていた EP1後の状況（多少減った感じ） 歯医者に行っていたので この後の写真は無い。 STF Cavity Group Meeting @2010/3/15

  8. Status of pre-EP for MHI#10 ① Tcavity current voltage Treservoir Troom Tcavity 電圧を5Vにキープして、空洞内液温が35℃を超えないように制御する。 average current density STF Cavity Group Meeting @2010/3/15

  9. Status of pre-EP for MHI#10 ② 左図は平均電流密度と電圧の相関 右図は定常状態での分布 STF Cavity Group Meeting @2010/3/15

  10. Status of EP1 for MHI#10 ① Tcavity current voltage Treservoir Troom average current density 電流と空洞内液温があまり高くならないように制御する。 Tcavity STF Cavity Group Meeting @2010/3/15

  11. Status of EP1 for MHI#10 ② 左図は平均電流密度と電圧の相関 右図は定常状態での分布 STF Cavity Group Meeting @2010/3/15

  12. Status of EP1 for MHI#10 ③ 両ビームパイプで温度が異なる。 途中からファンを右側固定にしたが、 それでもなお左側に比べて高かった。 左側の方は首振りにした後でも 温度がそれほど変わっていない。 バッテリーの問題で最後までデータ が取れなかった。 #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 STF Cavity Group Meeting @2010/3/15

  13. Status of W.R. after EP1 for MHI#10 １回目の水張りでEP液は ほとんど無くなっている ことがわかる。 前ページと縦軸のスケールが 異なることに注意。 #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 STF Cavity Group Meeting @2010/3/15

  14. Comparison of EP1 for MHI#10&11 ① Tcavity Treservoir Troom current voltage STF Cavity Group Meeting @2010/3/15

  15. Comparison of EP1 for MHI#10&11 ② average current density Tcavity STF Cavity Group Meeting @2010/3/15

  16. Comparison of EP1 for MHI#10&11 ③ STF Cavity Group Meeting @2010/3/15

  17. Comparison of EP1 for MHI#10&11 ④ STF Cavity Group Meeting @2010/3/15

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