Optimization of Transfer of Cold Atoms From Two Dimensional Magneto Optical Trap to Three Dimensional Magneto Optical Trap

Mahesh, T. P. (2018) Optimization of Transfer of Cold Atoms From Two Dimensional Magneto Optical Trap to Three Dimensional Magneto Optical Trap. Masters thesis, Indian Institute of Science Education and Research Kolkata.

PDF (MS dissertation of T. P. Mahesh (13MS140)) 13MS140.pdf - Submitted Version Restricted to Repository staff only Download (4MB)

Abstract

This thesis reports on the generation of MOT for laser cooling and trapping of Rubidium 87 atoms. Probe-pump technique have been used in Rb gas cell and doppler free absorption peaks has been observed. Peak at the crossover frequency will be locked for laser cooling and repump beams. This locked freuqency used in MOT to trap Rb atoms. The technique of optical molasses is used to cool the atoms and quadrupole magnetic field applied to confine or trap atoms at the center of MOT. Two chambers are constructed for 2D and 3D MOT with different pressure. Rb atoms loaded efficiently from the high flux cold atom beam generated in a compact 2D MOT. This is the first step of Bose Einstein Condensate (BEC). A performance of 2D MOT was tested by another main chamber of 3D MOT contains 3 pairs of counter-propagating beams. Over 5x10⁶ atoms trapped in a 3D MOT with loading rate of 1:8x10⁶ atoms/sec. This experiment provided an excellent starting point for future experiment on Rydberg atoms in dense ultracold quantum gases.

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