Atom beam emersion from hot cavity laser ion sources

In‐Source High‐Resolution Spectroscopy Using an Integrated Tunable Raman Laser

“…The directivity of the ion source was estimated by calculating the histogram of particle angles (equivalent to a radiation pattern) in the xz plane, and it is assumed to be axisymmetric about the z axis. Figure 4c shows in blue such a radial histogram, which is notably different (less directional) to the one shown in [56] for simple tubular geometries. The polar plot is accompanied by the scattered distribution showing the velocity vector magnitudes of the particles in the xz plane.…”

“…atom density at a given time) $$\epsilon$$ are plotted as a function of $$z$$, yielding comparable results to the experimentally measured ones. [ 56 ] Due to the waist size of the interacting laser beams, the average spectral resolution $$\overline{\Delta f_r}$$ is the result of the combined effects of the slice resolution $$\Delta f_r (z)$$, the efficiency $$\epsilon (z)$$ and the beam profile. For our particular experimental scenario, the laser beam was intersecting the ion beam at $$z$$ = 6 mm with a Gaussian beam diameter of around 1 mm (1/e 2 ), yielding an estimated resolution of $$\overline{\Delta f_r} \approx$$ 0.4 GHz.…”