In this chapter a description is given of the setup used for our experiments. In sec. 2.1 an overview of the complete setup is given. All devices used in the setup are briefly described: the He* source, which produces the initial beam of He* atoms (sec. 2.2), the channeltron, which detects the particles at the end of the setup (sec. 2.3), the cooling devices (sec. 2.4), and the lasers and optics we used for our experiments (sec. 2.6). We look in more detail at the method of aligning the collimator in sec. 2.5. Finally in sec. 2.7 the way of stabilizing the frequency of light of the used lasers is described.