B3L12 stave The upper side in this picture is the side where the leak position was first found The lower side in this picture is the side where we see.

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Presentation transcript:

B3L12 stave The upper side in this picture is the side where the leak position was first found The lower side in this picture is the side where we see strange object inside the tube The lower side was cut by Bill Lenz at the middle so that we can see inside of the tube The strange objects are at the corner of the tube. A half of the tube stayed in the stave. The other half was cut out and was placed next to the stave. The Kapton tape is to protect the cut area. It was placed after Bill Lenz cut the tube. Then he cut/removed the carbon sheet of the upper part to reveal the tube. RIM6125

The tube is really dirty. A lot of reactions. A lot of dirty stuff. Start scanning the upper part: Aluminum tube surface. RIM :18=12:03 EST

:23 (11:48 EST) start of upper surface scan End 13:34 (11:59 EST)

Looks like a leak point :41 (12:01EST) RIM :18(camera) 12:03 EST After top surface scan, see the side wall We found a large corrosion near the end.

RIM6146 scan of the small cut-away piece 13:30(camera) = 12:15 EST :52=12:17 EST :09=12:29 EST End of Scan. Lunch break This is the “strange object”

RIM :35=13:20 EST RIM6149 This is the one seen in the video scope RIM6159 the other side of the piece You can see several yellowish spots

RIM6167 position of the strange feature inside of the tube The backside. The arrows points to yellowish spots The left spot is quite large

:12=13:37EST RIM6172. To see the strange object at the corner, Hubert made a nice support RIM6174 View the corner. ~45 deg rotated. 14:49(camera) = 13:34 EST trying to get a better lighting You see the strange feature at the corner :12=13:37EST

I think this is before Rachid touched the place (15:49=14:14EST) Rachid touched the place. Actually this is just after he touched. He said the surface was smooth. But color is changed. No large deformation of the shape. I think this spot is the strange object seen at the corner by the video scope. In the video scope, there are a few more places with similar features. I believe the spot in the small piece is exactly the same place seen in the video picture on the left.

We found a proper lightning Looks like a think film-like layer. It is possible that Rachid scratched off some of them