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Process log Status of working Monitor data during EP & Rinsing process Comparison of EP2

MHI#14 号機の２回目の EP1. Period : 2011/4/19 ~ 4/21 Process : EP1(100 μ m, 50mA/cm 2 ), Normal 1 st Water Rinsing [90min], Degreasing (FM-20, 2%) [30min], HPR [6 hours] Preparation :Attachment to jigs Workers : M. Sawabe, Kirk, M. Satoh (KEK),

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Process log Status of working Monitor data during EP & Rinsing process Comparison of EP2

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  1. MHI#14号機の２回目のEP1 Period : 2011/4/19 ~4/21 Process : EP1(100μm, 50mA/cm2), Normal 1st Water Rinsing[90min], Degreasing (FM-20, 2%) [30min], HPR [6 hours] Preparation :Attachment to jigs 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) Process log Status of working Monitor data during EP & Rinsing process Comparison of EP2 STF Cavity Group Meeting @2011/4/25 Kirk

  2. Condition of EP & Rinsing • EP acid (4/20のEP1後のサンプルを使用) • Nb ingredient : 9.6g/ℓ • HF ingredient : ? g/ℓ (全体?g/ℓの65%が反応に使われる) • Al ingredient : 18mg/ℓ • Current density : ～50mA/cm2 (EP1の時は通常の電流密度で行う) • Cavity surface temperature : <40℃ • 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 (1.5hour) • 10min (storing)/3min (flushing)で行う • Degreasing (30min) • FM-20 (2%) • HPR (～6 hours) • 28m (1 turn, w/o blind flanges) • 5h16m (6 turns, w/o blind flanges) STF Cavity Group Meeting @2011/4/25

  3. Process log ① 4/19 9:00 MHI#14 is moved to EP area 10:00 Check every flange [O.K.] (polishing HOM at input side) 10:05 Attachment of jigs for EP 10:30 HPR starts without cavity 11:00 Meeting for tomorrow’s working procedure 11:20 Set cavity to EP bed with crane 11:25 Installation of cathode bar to cavity 11:40 Set data logger to cavity (totally 12ch) Leak check with N2 gas [O.K.] 13:15 fin. STF Cavity Group Meeting @2011/4/25

  4. Process log ② 4/20 8:35 Cavity rotation starts / EP acid flow starts 8:59 EP1 starts 10:38 Alarm occurred due to low acid level in reservoir! @36.6μm Stop current flow and acid flow It was not recover even after pushing “Reset” button many times Check acid level meter in reservoir (dangerous working!) 11:02 EP acid flow restarts 11:04 EP1 restarts (Set 65μm) 13:58 EP1 stops [5h00m] / Idling rotation (3 rpm / 20min) / Plastic case detachment 14:16 Idling rotation stops 14:18 EP acid is removed from cavity with N2 gas flow(0.020MPa) 14:32 First rinsing with ultra pure water starts 16:02 First rinsing with ultra pure water stops [1h30m] 16:11 Detachment of restriction jigs / Data logger detached 16:25 Un-installation of cathode bar from cavity / washing cathode bar (No black mark) 16:35 transferring cavity from EP bed to wagon 16:58 Detachment of jigs for EP / Detaching every blind flange of teflon / Checking inside cavity (No mark) / Checking teflon surface (No mark) 17:06 Shower rinsing @CP area 17:15 Attachment of flanges for degreasing 17:20 Supplying degreaser into cavity 17:27 Degreasing with ultrasonic starts 17:57 Degreasing with ultrasonic stops [30min] STF Cavity Group Meeting @2011/4/25

  5. Process log ③ 4/20 18:00 Detachment of flanges for degreasing 18:15 Shower rinsing @CP area 18:25 Transferring cavity from wagon on turntable for HPR using crane 18:38 Checking tolerance between position of nozzle and center of beam pipe 18:40 1st HPR for inside cavity starts 19:08 1st HPR for inside cavity stops [0h28] 19:10 fin 4/21 9:08 2nd HPR starts 14:25 2nd HPR stops [5h17m] / Drying @HPR room 4/22 9:00 move MHI#14 to inspection room 4/25 9:00 optical inspection starts STF Cavity Group Meeting @2011/4/25

  6. Status of working ① STF Cavity Group Meeting @2011/4/25

  7. Status of working ② STF Cavity Group Meeting @2011/4/25

  8. Status of working ③ STF Cavity Group Meeting @2011/4/25

  9. Status of working ④ STF Cavity Group Meeting @2011/4/25

  10. Status of working ⑤ STF Cavity Group Meeting @2011/4/25

  11. Status of working ⑥ STF Cavity Group Meeting @2011/4/25

  12. Status of 2nd EP1 for MHI#14 ① current Tcavity Treservoir voltage Troom average current density EP1の場合は通常通り50mA/cm2で行う。 途中で２回ほどジャンプしているのは、 電圧を20V前後で調整していたことによる。 また、リザーバタンク内の液面計のトラブルに 因り、２０分ほどの中断があった。 Tcavity STF Cavity Group Meeting @2011/4/25

  13. Status of 2nd EP1 for MHI#14 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 @2011/4/25

  14. 最近のEP1の定常状態の比較 MHI#17のEP1の結果はドリフトの効果が大きい。 STF Cavity Group Meeting @2011/4/25

  15. Status of 2nd EP1 for MHI#14 ③ EP1の間の空洞表面温度の状況。 テープが取れてしまった #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 STF Cavity Group Meeting @2011/4/25 Steady state: 38.5 35.1 34.5 32.4 34.3 20.4 30.8 33.7 32.3 37.0 35.4 11.3

  16. Status of 2nd EP1 for MHI#14 ④ EP1の間の空洞表面温度の状況（前ページの最後の拡大図）。 テープが取れてしまった #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 STF Cavity Group Meeting @2011/4/25

  17. Status of UWR for MHI#14 ① #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 STF Cavity Group Meeting @2011/4/25 Steady state: 19.1 18.2 18.8 17.0 17.9 17.5 17.3 18.5 17.7 18.2 18.3 17.7

  18. Status of UWR for MHI#14 ② 一次洗浄中の空洞温度の状況（前ページの拡大図） #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 STF Cavity Group Meeting @2011/4/25

  19. Status of UWR for MHI#14 ③ STF Cavity Group Meeting @2011/4/25

  20. Status of HPR for MHI#14 クリーンルーム作業を始めるために、クラス１０００のフィルターのファンを入れたら、TOCが徐々に上がっていった。 STF Cavity Group Meeting @2011/4/25

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