130
edits
Jared lab notebook: Difference between revisions
Jump to navigation
Jump to search
no edit summary
No edit summary |
No edit summary |
||
|
This data is from Oct 30, when I noticed that changing the shim current on #2 from 4 Amps made a difference in the features.
[[https://wiki.physics.wisc.edu/yavuz/images/d/da/0to20mWCoupling_3.7mWProbe_DifferentNo2ShimCurrents.pdf Shim Current Changes]]
--[[User:Jmiles2|Jmiles2]] ([[User talk:Jmiles2|talk]]) 14:00, 17 November 2014 (CST)
Since changing the shim currents changes the features and contrast, I think the problem is with the m levels. Not sure how to see that though, so we've but a large magnetic field on the FORT to split the shim levels by about 10 MHz. This takes 15 Amps with the current set up. The coils were already on the MOT chamber but haven't been used for awhile.
The idea is to seperate the m levels and only use 1 level to do the experiment. Then I'll change the shim currents slightly and see if I see the same thing.
The problem now is that I would need about 30 amps to separate the levels far enough using 100 ns pules. So I'm switching to 200 ns pulses, this cuts the width in frequency space by half.
| |||