锶原子光钟磁光阱磁场及其控制电路设计

由于锶原子光钟两级冷却对磁光阱磁场有不同的要求，为减少磁场转换时原子的逃逸，需在短时间内以一定的时序控制变换磁场。对反赫姆霍兹线圈设计的一般理论进行了讨论，为锶原子光钟的两级冷却设计了相应的磁场，并制作了转换磁场的发生控制装置。该装置主要包括控制电路、保护电路2部分。测量得到通过线圈的电流受控于输入信号，符合实验要求。

Design of magnetic field of magnetic-optical trap and control circuit for Sr optical lattice clock

Owing to the different requirements to the magnetic field of magnetic-optical trap for the two different stages of cooling of Sr optical lattice clock, the magnetic field conversion needs to be controlled with a certain sequence within a short time for reducing the fleeing of the atoms in the magnetic field conversion. The theory of the anti-Helmholtz coil is discussed, a design of the magnetic field for the two-stage-cooling of Sr optical lattice clock is presented, and an occurring and controlling device for the magnetic conversion, which mainly contains control circuit and protection circuit, is manufactured. The measurement shows that the current through the coil is controlled by the input signal, meeting the experimental requirements.