Current Status of the XENON100 Dark Matter Experiment

Non-baryonic Dark Matter makes up $\sim $85{\%} of all matter in the universe. A plausible theoretical class of candidates are Weakly Interacting Massive Particles (WIMPs). XENON100, located at the Gran Sasso National Laboratory in Italy, is a liquid/gas xenon time projection chamber for direct detection of WIMP-nucleon recoils. XENON100 is the successor of the highly successful XENON10 experiment, featuring 10 times greater sensitive mass ($\sim $50 kg fiducial) and 100 times lower background. The expected sensitivity is $\sim $10$^{-45}$ cm$^{2}$ for spin-independent interactions. XENON100 has been installed and has started operating. I will report on the present status of XENON100 and its expected physics reach.