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Lodewijk van den Berg is a chemical engineer,
specializing in crystals, who flew on the 1985
Challenger space-shuttle mission.

==Education and career==
Dr van den Berg was born on March 24, 1932, in
Terneuzen|Sluiskil, the Netherlands, and is a
naturalized U.S. citizen.  He was educated in the
Netherlands, but after receiving a Masters degree
in chemical engineering from the Technical
University in Delft, he moved to the University of
Delaware, where he took another masters degree,
this time in applied science, and then his Ph.D.,
also in applied science.

Dr van den Berg has over twenty years of research
and management experience in the preparation of
crystalline materials — in particular, the
growth of single crystals of chemical compounds,
and the investigation of associated defect
chemistry and electronic properties. After he had
completed his Ph.D., he joined EG&G Corporation in
Goleta, California, where he is responsible for
the operation of a crystal-growing facility, which
produces various kinds of crystal by vapor
transport methods. Dr van den Berg is a
co-investigator on the Spacelab-3 mission Vapor
Crystal Growth System (VCGS) experiment. In that
capacity, he is responsible for the crystal growth
aspects of the VCGS experiment. He has intimate
knowledge of VCGS and Fluid Experiment System
(FES) hardware, and has participated in all major
design and science reviews of those sytems. He has
broad experience in crystal growth and
characterization, including vapor transport,
solution, and melt growth techniques. He is an
international Authority on vapor growth techniques
with an emphasis on mercuric iodide crystals and
its application in the nuclear industry as gamma
ray detectors.

==Space flight experience==
Dr van den Berg flew on STS-51B Challenger (April
29–May 6 1985). STS-51B, the Spacelab-3
mission, was launched from the Kennedy Space
Center, Florida, and returned to land at Edwards
Air Force Base, California. It was the first
operational Spacelab mission. The seven-man crew
aboard Challenger conducted investigations into
crystal growth, drop dynamics leading to
containerless material processing, atmospheric
trace gas spectroscopy, solar and planetary
atmospheric simulation, cosmic rays, and
laboratory-animal and human medical monitoring. By
the end of the mission, Dr van den Berg had
traveled over 2.9 million miles in 110 Earth
orbits, and logged over 168 hours in space.

Source:
http://www.jsc.nasa.gov/Bios/htmlbios/vandenberg-l
.html Dr van den Berg — NASA

NASA