| In this paper, we mainly introduce two works. One is that we creat Bose-Einstein condensate (BEC) in a optical dipole trap, which is my primary work during my graduate student. Firstly, an overview of the background knowledge of BEC is given. Then the basic theories and our experiment of BEC are introduced detailedly. The second one is my preparation for the experiment of Feshbach resonance. We make compact Helmholtz coils which can endure high current and produce a strong magnetic field. And the magnetic field can be stabilized by controlling the stability of the current. We use a negative feedback circuit to control the stability of the current up to 1*10-5. |
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