November 2014: For the first time in our laboratory, Nejc Rosenstein recorded the fluorescence of the cesium atomic beam inside the UHV system. We directed the collimated laser beam into the atoms, perpendicularly to the direction of their flight. The signal was recorded with cameras IDS UI-1240ML-NIR and Andor Neo. Even though the IDS camera is not suitable for our experiment because of relatively low sensitivity and inadequate dark signal surpression, we managed to detect the fluorescence signal. However, much better results were obtained with the Andor Neo camera. The camera sensor is cooled down to -40°C, which results in the reduction of the dark signal. The area in which the fluorescence was detected matches with the intersection area of atomic beam and the laser beam. We measured beam profiles simultaneously with the fluorescence imaging. All camera parameters and the settings of laser beam profiler remained unchanged during the acquisition of all three images shown below. The images were recorded at different laser light intensities and at different laser beam widths. 


July 2014: Pavel Kos and Nejc Janša, the Faculty of Mathematics and Physics undergraduate students, joined our team. They will design, build and test a tabletop modulation transfer spectroscopy of cesium atoms. In parallel they will help to assemble and test the MOT and compensation coils. >> more


April 2014: We measured our first Doppler-free saturation spectra of Cs D2 line!


January 2014: Rok Žitko built and tested a prototype of a very tiny servo motor controller based on ATtiny 85 microcontroller.