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A second section of tube was exposed, on the same side, starting at the tube end.
Next, a set of microscope pictures were taken, starting at the red arrow, and moving left.
Click on any picture for a full-size image → |
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| Here you can see the edge of the exposed section, with bits of the .5mm carbon foam still attached. On the bottom you can see two orange blobs in the gap between the tube and the carbon foam. |
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Not clear what this is. Could be the same residue that was seen Summer 2011 before the Novec
filtering system was installed, and (presumably) plasticizer was leached out of the system's
hoses and was deposited in places where Novec escaped.
This blob is in the top of the gap. |
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| The same stuff was seen in many other places along this side of the tube. Here some is down on the bottom of the gap between the tube and the foam, deposited on the white epoxy that bonds the carbon sheet to the tube and the foam. These places show signs of wetting. |
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| We noted that the Aluminum protruding from the stave was much cleaner than the surfaces on the inside. |
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| After that, I milled the corners of front few cm and folded the top of the tube up as is shown in the picture. This enabled us to see the tube inside in an area where we had video taken with the borescope. |
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| The inside surface was scuffed from the repeated insertion of the tight-fitting borescope, but otherwise clean. |
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| The inside surface was scuffed from the repeated insertion of the tight-fitting borescope, but otherwise clean. |
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Hubert Van Hecke Last modified: Fri Jan 25 16:02:09 EST 2013