Nicht angegeben.This thesis presents a first step on the way towards a metastable helium BEC. This kind of experiment requires a high-flux source with a low peak velocity.
In the scope of the Master’s Thesis, the source of metastable helium atoms was built and characterised. In addition, the atomic beam was collimated and deflected, in order to increase its intensity.
The intensity of the metastable helium beam was measured to be approximately 1-8*10E14 atoms per steradian per second. At the same time the peak velocity ranged between 650-1050 m/s. The increase in the intensity of the atomic beam was achieved by a 2D collimation with laser light right after the skimmer. This enabled us to gain twenty-six-fold in the number of atoms per second per steradian
