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 ～ 3/15Process : 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)

Kirk1STF Cavity Group Meeting

@2010/3/15

STF Cavity Group Meeting @2010/3/15

2

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 port10:26~ CP @flanges10:30~ Attachment of jigs for EP / found several scratches on one beam pipe flange11:39 Set cavity to EP bed with crane13:00 Installation of cathode bar to cavity13:21 Pressure test with N2 gas13:31 Meeting for tomorrow’s working procedure

3/10 9:00 preparation working starts10:23 pre-EP starts11:24 pre-EP stops [1:01] / Idling rotation starts (3 rpm)11:34 Idling rotation stops11:36 EP acid is removed from cavity11:56 First rinsing with ultra pure water starts13:27 First rinsing with ultra pure water stops [1:30]13:36 Detachment of restriction jigs13:44 Un-installation of cathode bar from cavity / washing cathode bar13:57 transferring cavity from EP bed to wagon14:04 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 room14:26 Shower rinsing stops / Checking every flange [O.K.]

/ Checking inside cavity (No marks) [O.K.] / No smell

Process log ①

Process log ②

STF Cavity Group Meeting @2010/3/15

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3/10 14:29 re-attachment of jigs for EP14:51 Set cavity to EP bed with crane15:30 Installation of cathode bar to cavity15:43 Pressure test with N2 gas15:50 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 starts13:29 EP1 stops [4:21] / Idling rotation (3 rpm)13:49 Idling rotation stops13:50 EP acid is removed from cavity14:16 First rinsing with ultra pure water starts / It takes 2 minutes for overflow15:48 First rinsing with ultra pure water stops [1:30]15:56 Detachment of restriction jigs16:04 Un-installation of cathode bar from cavity / washing cathode bar16:22 transferring cavity from EP bed to wagon16:45 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 room17:03 Shower rinsing stops / Checking every flange (probe port was attacked by EP acid)

/ Checking inside cavity (white stain on beam pipe) / No smell

Process log ③

STF Cavity Group Meeting @2010/3/15

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3/11 17:10 Attachment of jigs for degreasing17:17 Flowing FM-20 into cavity17:23 Degreasing with ultrasonic starts18:22 Degreasing with ultrasonic stops [1:00]18:25 Removing FM-20 from cavity18:30 Detachment of jigs for degreasing18:40 Shower rinsing in CP room18:56 set to HPR turn table19:04 Checking tolerance between position of nozzle and center of beam pipe19:10 HPR for inside cavity starts21:04 HPR for inside cavity stops by manual control [2:04]

keep in HPR room by next Monday21:18 fin.

3/15 9:00 take out from HPR room14:30 transfer from STF to workshop for annealing

Status of working ①

STF Cavity Group Meeting @2010/3/15

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CP @flangesAttachment of EP jigs Setting on EP bed

Inserting cathode bar伸縮天井

Status of working ②

STF Cavity Group Meeting @2010/3/15

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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

Status of working ③

STF Cavity Group Meeting @2010/3/15

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歯医者に行っていたのでこの後の写真は無い。

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）

STF Cavity Group Meeting @2010/3/15

Status of pre-EP for MHI#10 ①

8

current

voltage

Tcavity

Treservoir

Troom

Tcavity

average current density

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。

Status of pre-EP for MHI#10 ②

STF Cavity Group Meeting @2010/3/15

9

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

Status of EP1 for MHI#10 ①

10

current voltage Tcavity

Treservoir

Troom

Tcavity

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。

Status of EP1 for MHI#10 ②

STF Cavity Group Meeting @2010/3/15

11

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

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

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。

Status of EP1 for MHI#10 ③

STF Cavity Group Meeting @2010/3/15

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#1 #2 #3 #4 #5 #6 #7 #8 #9 #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。

Status of W.R. after EP1 for MHI#10

STF Cavity Group Meeting @2010/3/15

Comparison of EP1 for MHI#10&11 ①

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Tcavity

Treservoir

Troom

current

voltage

STF Cavity Group Meeting @2010/3/15

Comparison of EP1 for MHI#10&11 ②

15

Tcavity

average current density

STF Cavity Group Meeting @2010/3/15

Comparison of EP1 for MHI#10&11 ③

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STF Cavity Group Meeting @2010/3/15

Comparison of EP1 for MHI#10&11 ④

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