Electron temperature and radial density distribution of Cs ground-state atoms in the positive column of a CsAr D. C. low pressure discharge

A Mechanism of Rubidium Atomic Clock Degradation: Ring-Mode to Red-Mode Transition in rf-Discharge Lamps

“…Examining the radial variation of xenon light and rubidium second resonance light, 1 we found that the xenon emission appeared to come uniformly from the lamp volume, while the rubidium light was principally located near the lamp walls. This is consistent with previous work [2,3], indicating that Rb atoms are ionized in the discharge and that atomic resonance lines are generated near the lamp walls, where ion/electron recombination is most probable. Visually, we found that the ring-mode to red-mode transition occurred around 165 o C in these experiments.…”

“…Visually, we found that the ring-mode to red-mode transition occurred around 165 o C in these experiments. 2 Further, we found that the radial distribution of xenon light and rubidium light did not change as we transitioned from ring mode to red mode, suggesting that at no time was xenon appreciably ionized. If xenon had been ionized, its radial distribution would have mimiced that of rubidium.…”

Spectre de la raie D du Rb dans le cas d'une lampe sphérique

“…Comme il a déjà été rapporté précédemment [6], la distribution des atomes du Rb excités et ceux dans l'état fondamental n'est pas homogène dans la lampe émettrice, leurs nombres, pour les deux, augmentent au fur et à mesure que l'on se rapproche de la paroi. En se référant aux expériences du van Tongeren et al [12,13,14], on suppose ici qu'ils augmentent d'une manière quadratique vers la paroi, comme le montre la figure 3.…”