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Recent techniques that have been developed to produce trapped samples of cold molecules have allowed the possibility of studying low energy collisions in a regime were the interactions are dominated by resonances and can be controlled and manipulated using external fields. We use a Stark decelerator to decelerate a beam of polar ND3 molecules using time-varying inhomogeneous electric fields. The ND3 is decelerated in the upper inversion doublet state, |JK> = |11>, and then loaded into an electrostatic quadrupole trap. A magnetically trapped cloud of laser cooled Rb atoms, is then overlaid with the ND3 trap where collisions between the two species can then be studied. Host: Diego Dalvit |