mhi#15 号機の２回目の ep2 process log status of working monitor data during ep &...

MHI#15号機の２回目のEP2 Process log

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

Period : 2011/2/22 ~ 2/28Process : CP @flanges, EP2(20μm) 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, T. Shishido (KEK),

K. Nakamura, N. Tasaki, F. Tsukada (Assist Engineering Co.),T. Okada (K-VAC),S. Imada (Nihon Advanced Technology)

Kirk1

STF Cavity Group Meeting @2011/3/28


2

• EP acid (2/23のサンプルを使用 )• Nb ingredient : 8.4g/ℓ• HF ingredient : 28 g/ℓ (全体 38g/ℓの 65%が反応に使われる )• Al ingredient : 15mg/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

• Degreasing (1 hour)• FM-20(2%)

• HPR (～ 10 hours)• 5h17m (6 turns, w/o blind flanges)• 4h25m (5 turns, w/ blind flanges)

Condition of EP2 & Rinsing

Brushing @HOM & Flange

using FM-20

Brushing @Flangeusing FM-20

EP2を 1 ～ 2 回行ったぐらいではたいして変化しない

Process log ①


3

2/22 9:00 Check every flange / Hit trace was observed at input port10:00 CP @flanges10:45~ Attachment of jigs for EP / HPR operation starts without cavity11:28 Set cavity to EP bed with crane11:48 Installation of cathode bar to cavity

Lunch time13:00 Set data logger to cavity (totally 12ch)

Leak check with N2 gas [O.K.]13:30 Meeting for tomorrow’s working procedure13:50~ Vacuum parts rinsing with ultrasonic in C.R.15:00 fin. / HPR stops due to high T.O.C.


2/23 9:47 Cavity rotation starts / EP acid flow starts 9:59 EP2 starts11:11 EP2 stops [1h12m00s] / Idling rotation (3 rpm / 20min) / Plastic case detachment11:30 Idling rotation stops11:32 EP acid is removed from cavity with N2 gas flow(0.020MPa)11:44 First rinsing with ultra pure water starts13:14 First rinsing with ultra pure water stops [1h30m]13:22 Detachment of restriction jigs / Data logger detached13:40 Un-installation of cathode bar from cavity / washing cathode bar (No black mark)13:52 transferring cavity from EP bed to wagon / Checking inside cavity14:14 Detachment of jigs for EP / Detaching every blind flange

/ Checking inside cavity (White mark exists!)14:30 Brushing at every flange using FM-20 / Shower rinsing14:45 Checking inside cavity (White mark still exists!)14:50 Attachment of flanges for degreasing14:55 Flowing FM-20 into cavity14:59 Degreasing with ultrasonic starts15:59 Degreasing with ultrasonic stops [1hour]16:02 Removing FM-20 from cavity16:10 Detachment of flanges for degreasing16:16 Brushing at every flange using FM-20 / Shower rinsing

/ Checking inside cavity (White mark still exists!)

Process log ②

4

Process log ③


5

2/23 16:30 Transferring cavity from wagon on turntable for HPR using crane16:36 Checking tolerance between position of nozzle and center of beam pipe16:48 1st HPR for inside cavity starts22:05 1st HPR for inside cavity stops [5h17m] (6 turns)22:10 Attaching only top flanges in C.R.22:35 fin.

2/24 9:00 Attachment of blind flanges at bottom beam pipe for 2nd HPR 9:15 HPR outside cavity with blind flanges starts [15mins] 9:35 2nd HPR for inside cavity with blind flanges starts

During HPR, cover of rotation mechanism was broken!13:57 2nd HPR for inside cavity with blind flanges stops [4h25m] (5 turns)14:00 Cavity enters into C.R.14:30 Assembly in C.R. (Class 10) starts(type of helicoflex is changed from In to Sn coating)16:00 Assembly in C.R. (Class 10) finishes / Moving out from Class10 to Class100016:07 Vacuum evacuation starts with heat guns16:17 Turbo pump status 100% (Normal operation, but abnormal noise)16:40 Leak check thoroughly @~6.7x10-4Pa Leak occurred at ICF gasket between bellows

Re-assembling using new Cu gasket / Re-pumping down / Re-leak check O.K.17:15 Baking @100℃ starts using new temperature controller

Max Vacuum Level just after baking start : ~1.4 x 10-3Pa18:15 Cavity vacuum : 6.63 x 10-4Pa @102℃/102℃/64℃/67 ℃

(Cell#3/Cell#7/Top/Bottom)19:08 Cavity vacuum : 2.31 x 10-4Pa @101℃/105℃/71℃/77 ℃


(Cell#3/Cell#7/Top/Bottom)

Process log ④


6

2/25 9:30 Cavity vacuum : 2.07 x 10-4Pa @100℃/105℃/82℃/84 ℃(Cell#3/Cell#7/Top/Bottom)

9:35 Additional aluminum foil is attached to both beam pipes13:05 Cavity vacuum : 2.12 x 10-4Pa @100℃/105℃/85℃/90 ℃


(Cell#3/Cell#7/Top/Bottom)

2/26 21:15 Cavity vacuum : 1.31 x 10-5Pa @100℃/105℃/86℃/90℃21:25 Baking Off [52hours] / Ion Pump ON21:40 Cavity vacuum : 2.35 x 10-6Pa @92℃/87℃/82℃/84℃

2/28 9:10 Cavity vacuum : 0.98 x 10-7Pa / I.P head : 0.0 x 10-8Pa 9:45 MHI#15 goes out of clean room and moves to V.T.A.

Status of working ①


7

壊れた HPRの昇降機構のカヴァー

Status of working ②


8

EP後にブラシングをかける

Status of working ③


9

白い縞模様の変遷

1 回目の EP2後 1 回目の V.T.後

2 回目の EP2後(1回目とは模様が異なっているようである )


Status of 2nd EP2 for MHI#15 ①

10

current

voltage Tcavity

Treservoir

Troom

Tcavity

average current density 平均電流密度が 37mA/cm2程度になるように電圧を調整する。(low current density EP)

11STF Cavity Group Meeting

@2011/3/28

Status of 2nd EP2 for MHI#15 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

target

最近の定常状態の比較


12

Cavity Mean temp. [℃]

R.M.S. temp. [℃]

Mean i [mA/cm2]

R.M.S. i [mA/cm2]

MHI-A 1st 26.1 0.8 36.5 1.5

MHI#12 1st 25.6 0.9 34.5 1.4

MHI#13 1st 26.9 0.9 37.4 1.5

MHI#12 2nd 26.2 0.5 36.3 1.4

MHI#13 2nd 26.6 0.7 37.6 1.6

MHI#14 1st 26.9 0.5 37.3 1.6

MHI#15 1st 27.9 0.9 36.2 1.5

MHI#14 2nd 29.0 0.8 38.0 1.2

MHI#15 2nd 28.1 0.7 37.3 0.9

電流の振れ幅は前回よりさらに小さくなった。だんだん液がヘタってきているものと思われる。

Status of 2nd EP2 for MHI#15 ③


13

#1 #2 #3 #4 #5 #6 #7 #8 #9 #10

EP2の間の空洞表面温度の状況。

#11

#12

Status of 2nd EP2 for MHI#15 ④


14

#1 #2 #3 #4 #5 #6 #7 #8 #9 #10

EP2の間の空洞表面温度の状況（前ページの最後の拡大図）。

#11

#12


15

#1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11

#12

Status of UWR for MHI#15 ①

通信不良によるデータの跳びが無くなった。


16

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

Status of UWR for MHI#15 ②

Status of UWR for MHI#15 ③


17

①は最初の注水完了時。②は流量を増やした状態での洗浄中。③は流量を減らした状態での洗浄中。

①

②

③


Status of HPR for MHI#15

18

ノズルは 1st HPRでは６往復、 2nd HPRでも５往復させた。

HPRの昇降機構を防護するカバーが壊れたため、２回目の途中から TOCも particleも増加傾向にある。

mhi#15 号機の２回目の ep2 process log status of working monitor data during ep &...

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