  Large Momentum Transfer (LMT) beam splitters are implemented in atom
interferometers to increase their sensitivity. However, LMT-interferometer
requires additional light-pulses that modify the response function of the atom
interferometer. In this paper, we develop an analytical model for the
sensitivity function of the LMT-interferometers using sequential accelerating
light pulses. We use the sensitivity function to calculate the acceleration
sensitivity taking into account the pulse duration. In addition, the
sensitivity to laser phase uctuations is calculated, and we show that the pulse
sequence can be engineered to mitigate the phase noise sensitivity.
