Currently we are working on an optical pumping experiment with in the linear guide, transfering the atoms from the initial guided state |F=1, mF=-1> into the |F=2, mF=2> state, which is also low-field-seeking.
We are also working on transfering atoms from the primary MOT to the secondary MOT in the new experimental setup. Soon we should begin the optimization of this transfer process.
The end is in sight for construction of the new guide. Final assembly will be the next major event in the lab.
in Chelsea just finished the rail and the wire stabilizers for the new guide. The rail is 65 inches long, and each of the stabilizers are 1.5 inches long. There are 21 stabilizers along the length of the rail.
The Physics Machine Shop
just finished the parts they were building for us last week, and they look fantastic. I'd like to thank Jim Tice for doing the machine work, and Jens Zorn for taking these pictures of the parts. For a sense of scale, the piece shown with the orange drawing is approximately 5.75 inches tall. The pink piece fits inside of the orange piece, and the blue piece fits inside the pink piece. All of these then go inside the part of the chamber that is colored purple in the drawing below.
We have been designing the next version of the guide for a few months now, and plans are well underway. Almost all of the parts have been ordered and some have started to arrive. The new guide will address two of the main problems that the current guide has: stray light and not enough input flux. To counteract the stray light, the new guide has a mechanical shutter. The input flux will be addressed by replacing the pyramidal MOT with the Zeeman Slower (which is already in place). An Autocad version of the new guide can be seen below.
The current guide will continue to operate while the new version is being constructed. We are working on some Rydberg studies and should have results soon.
In other news, plans are also underway for a spiral version of the atom guide. When realized, it will share the Zeeman Slower as the atom source, and will sit on the opposite side of the table from the linear guide pictured above.
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