Experimental studies of evaporative cooling and Bose Einstein condensation in an optical trap

We employ a double-MOT system where atoms are firstly collected for their precooling in a 2D-geometry in a high pressure region. From this source region thereafter, the atoms are efficiently transferred into a conventional MOT inside a UHV chamber with capture rates exceeding 10^8 atoms/s. After a loading time of 1s and a loading phase of 60 ms about 1% of the atoms are trapped in a tight CO2 Laser focus region. Evaporative Cooling is optimized by lowering the dipole trap depth over a 7s period, leading to condensates of typically having 20000 atoms. In this thesis detailed characterization of the system and its diagnostic tools will be presented.

Author dc:creator

• Tripathi, Ajay

Contributors dc:contributor

• Helm, Hanspeter

• Dipolfalle
• Laser Cooling
• Bose -Einstein Condensation
• Optical Trap

Repository record source_url

https://freidok.uni-freiburg.de/data/2477

OAI identifier oai:identifier

oai:freidok.uni-freiburg.de:2477