201208 R1ProgressRep

8/1/12

Strung 28 Field wires on Sector 5 (now on SL2 - row 15).

Installed filters on Sector 6 chamber.

8/2/12

Strung 126 Field wires on Sector 5 (now on SL2 - row 33). Removed C1 pretensioner at row 25.

Strung 48 Sense wires on Sector 6 (now on SL2 - row 183).

Completed Tension Trend tests for both Sector 5 and 6 chambers.

8/6/12

Started training a new stringer today.

Strung 56 Field wires on Sector 5 (now on SL2 - row 41). Removed R1 pretensioner at row 40.

Strung 15 Sense wires on Sector 6 (now on SL2 - row 188).

We have repeatedly had issues with blocked feed throughs on both Sector 5 and Sector 6. Spent the afternoon cleaning out feed throughs on both chambers. We will use nitrogen to clear out any debris after the process is complete. There is a Field feed through at 167-11 in superlayer 1 that is completely blocked by glue inside the chamber. We also spent considerable time removing small metal pieces from inside Sector 6. They appear to be tiny circles of metal. Pictures of all of the above mentioned issues will be taken and uploaded tomorrow.

8/7/12

Continued training the new stringer on top stringing Sector 5.

Strung 84 Field wires on Sector 5 (now on SL2 - row 53).

Strung 39 Sense wires on Sector 6 (now on SL2 - row 201).

Completed cleaning out Sector 6 chamber of all debris. Nitrogen was used to blow particles down to the tail where they were removed. Some of the metal pieces did not move easily when blown. They were retrieved with a small probe and a steady hand. No wires were touched or otherwise damaged during the proces. We are seeing several pieces of fibrous, fluffy material stuck in the glue around the feed throughs in this chamber. The particles do not move with any amount of nitrogen blown in their direction. They appear to be well seated in the gluue.

We are waiting to clean out the Sector 5 chamber until the blocked feed through is replaced.

Temperatures in the cleanroom have increased with the addition of another person in the room. The temperature set point was lowered by one degree to 68° F. The humidity set point was increased to 45%.

8/8/12

A visual inspection of the top crimp pins on the Sector 5 chamber for the wires strung yesterday revealed that several crimp pins were not seated completely. The crimp pins were pushed in and the wire tensions were retested. Wires that are out of spec will be replaced. A conversation about the importance of seating crimp pins was had with all stringers present. Our new stringer is out sick today, however, the issue will be addressed tomorrow and additional training will occur.

Strung 51 Sense wires on Sector 6 (now on SL2 - row 218).

8/9/12

Additional training completed with new stringer. Restringing bad wires on Sector 5 has begun. Progress and crimp pin seating will be inspected at the end of each row of stringing.

Strung 30 Sense wires on Sector 6 (SL2 now complete). Will conduct visual inspection before rotation and alignment for stringing SL1.

Completed Tension Trend Tests for both chambers.

8/13/12

Blocked feed through on Sector 5.

Damaged feed through on Sector 5.

Blue glue on feed throughs on Sector 6.

Strung 56 Field wires on Sector 5 (now on SL1 - row 61). Removed pretensioner C2 at row 60.

Rotated and aligned Sector 6 chamber for stringing Sense wires in SL1. Repositioned magnet and leveled stringing arm.

Strung 16 Sense wires on Sector 6 (now on SL1 - row 9).