  We present the design and performance of a cryogenic scanning tunneling
microscope (STM) which operates inside a water-cooled Bitter magnet, which can
attain a magnetic field of up to 38 T. Due to the high vibration environment
generated by the magnet cooling water, a uniquely designed STM and vibration
damping system are required. The STM scan head is designed to be as compact and
rigid as possible, to minimize the effect of vibrational noise as well as fit
the size constraints of the Bitter magnet. The STM uses a differential screw
mechanism for coarse tip - sample approach, and operates in helium exchange gas
at cryogenic temperatures. The reliability and performance of the STM are
demonstrated through topographic imaging and scanning tunneling spectroscopy
(STS) on highly oriented pyrolytic graphite (HOPG) at T = 4.2 K and in magnetic
fields up to 34 T.
