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Our group has two laboratories (each 1200 sq. ft.) and two molecular beam instruments. Each consists of a laser ablation molecular beam source, an oven, a time-of flight mass/ZEKE spectrometer, and a computerized data acquisition system. For vaporization, photoexcitation or photoionization, we use pulsed lasers, which include two excimer lasers (Lumonics PM884, GAM Ex10/200 ArF), six Nd:YAG lasers (Surelite II/III, Minilite II, Quanta-Ray GCR-3, Lumonics YM800), four dye lasers (Lumonics HD-500) with four frequency doublers (Lumonics HT-1000), and an IR OPO (LaserVision) system.

Each of the molecular beam mass/ZEKE photoelectron spectrometer consists of two vacuum chambers. A cubic chamber houses a Smalley-type laser ablation and an oven supersonic expansion source and is pumped by a 2200 L/s oil diffusion pump. A six-way-cross chamber houses the mass/ZEKE spectrometer and is pumped by two 400 or 450 L/s turbo molecular pumps. The spectrometer consists of a two-stage can-shape extraction assembly, a 34 cm long flight tube, and a dual micro channel plate. The whole spectrometer is encased in a cylindrical, double-layer m-metal shield.