MAGNETO-OPTICAL TRAP WITH INTEGRATED PCB COILS FOR ATOMIC TRAPPING AND COOLING.

Abstract

A magneto-optical trap (MOT) configured to cool and trap atoms is described, using an array of coils arranged in an anti-Helmholtz configuration. The coils, constructed using flexible printed circuit board (PCB) technology, are rectangular, flat, and flexible, and are connected to a controlled current source via a voltage divider circuit. This allows for precise regulation of the generated quadrupole magnetic field, optimizing atom trapping and cooling. The ultra-high vacuum (UHV) cell in which the MOT operates is configured to maintain an environment free of unwanted collisions, maximizing trapping efficiency.The laser system, configured for saturated absorption spectroscopy, is tuned to the resonant frequency of the target atoms and uses acousto-optic modulators (ACMs) to control the beam frequency and direction, facilitating Doppler cooling and trapping of the atoms within the vacuum cell. A fluorescence detection system, including lenses and detectors, is also incorporated to accurately measure the number of atoms and analyze their dynamics. Optionally, the Ia MOT can include a permanent magnet system that provides a continuous magnetic field without electrical current, reducing heat dissipation and improving optical access to the system. Advantages include increased flexibility, thermal efficiency, precision in magnetic field generation, and improved MOT performance in experimental applications.