This is somehow in contradiction with theeigenfrequency calculations (see Fig.4) in Horak, P.,Physical Review A, 61(3), 033609, 2000.
(b) There will be heating limiting the available measurement time. as the time scale can be faster than om_recoil, it could limit the measurement time to a fairly short period. Some rough estimate on the time scales should be added. In particular for the blue detuned case not only the average momentum but also the momentum spread will grow.