Changes

On Friday June 6, I took down a poster from the door to lab 402 and began to remove tape and adhesive residue from the doors. I continued this task on Monday June 9. I started with a rag wet with ethanol, but there were still some Scotch tape and thicker layers of masking tape on the door. I had hoped I could scrape off the tape with cardboard, but the cardboard was much too thick. I also tried my fingernails, but they were not well suited to the task either. I had considered a razor but was afraid it would damage the finish of the door. However, as I continued to use the rag with ethanol, Jim appeared with a razor blade and began scraping away the tape. After seeing him use the razor without harming the door, I took it and used it to remove the tape. I still had to use ethanol to wipe away the traces of adhesive afterwards. When I was done, I put the rags, now spotted with adhesive, on the shelf above the other used rags in lab 405.

On Friday June 6, I took down a poster from the door to lab 402 and began to remove tape and adhesive residue from the doors. I continued this task on Monday June 9. I started with a rag wet with ethanol, but there were still some Scotch tape and thicker layers of masking tape on the door. I had hoped I could scrape off the tape with cardboard, but the cardboard was much too thick. I also tried my fingernails, but they were not well suited to the task either. I had considered a razor but was afraid it would damage the finish of the door. However, as I continued to use the rag with ethanol, Jim appeared with a razor blade and began scraping away the tape. After seeing him use the razor without harming the door, I took it and used it to remove the tape. I still had to use ethanol to wipe away the traces of adhesive afterwards. When I was done, I put the rags, now spotted with adhesive, on the shelf above the other used rags in lab 405.

Friday June 20: I helped Liana and Aaron test fibers with the pulser. We had intended to do measurements on several bundles, but our test results were not useful, so we had to continue testing. When we randomly changed the positions of fibers in the bundle, the light transmission changed significantly in some of them. Also, when we repeated tests in situ, transmission decreased. Dr. Jones suggested that the position of the fibers in the chimney channels varies from run to run. He thought the decreasing transmission could be the result of increasing temperature as the electronics heat up.

Friday June 20: I helped Liana and Aaron test fibers with the pulser. We had intended to do measurements on several bundles, but our test results were not useful, so we had to continue testing. When we randomly changed the positions of fibers in the bundle, the light transmission changed significantly in some of them. Also, when we repeated tests in situ, transmission decreased. Dr. Jones suggested that the position of the fibers in the chimney channels varies from run to run. He thought the decreasing transmission could be the result of increasing temperature as the electronics heat up.

This week I found some MSDS sheets that we did not have. I printed ones that are clearly important today.

I cleaned the lab bench where the band saw and drill press are after Dr. Jones used the saw. I put some tools that were on the bench in the tool box there.