Lifetime study of cubic Rb vapor cell with Al₂O₃ coating through light induced atomic desorption

Lifetime of Rb vapor cell with Al₂O₃ coating was studied by light induced atomic desorption(LIAD). By observing variation of Rb vapor density due to LIAD, we measured characteristic parameters describing LIAD of our cubic cells. The model describing LIAD includes irreversible absorption of free Rb atoms inside the coating. We studied the dependency of irreversible absorption rate on coating, temperature and buffer gas pressure. At the same time, the density variation of free Rb atoms inside the coating was calculated by LIAD model. Taken together, the cell lifetime was estimated with given initial amount of Rb atoms.