Professor of Physics
Director Cloud and Aerosol Sciences Laboratory

EDUCATION:
B.S. Physics, University of Dayton, 1965
M.S. Physics, Purdue University, 1967
Ph.D. Physics (Theoretical solid state), Purdue University, 1970

Dr. Hagen directs the Cloud and Aerosol Science Laboratory (CASL) and leads a major research program studying of combustion aerosols, with a focus on gas turbine and rocket engine sources, and the evolution of these aerosols in the atmosphere. He is a principal investigator on research grants sponsored by NASA, AFOSR, USAF, USNAVY, Boeing, Pratt & Whitney, General Electric, the European Economic Community, the United Kingdom Ministry of Defense, and Princeton University. His research interests include:

• Aerosol Science
• Combustion aerosol technology
• Jet and rocket engine emissions sampling
• Nucleation and water microphysics
• Quantum mechanical calculations (MNDO) for molecular clusters and crystals
• Electronic structure calculations for clusters and solids
• Numerical cloud modeling
• Cloud simulation experiments
• Droplet growth, ice formation, scavenging

MEMBERSHIPS AND PROFESSIONAL AFFILIATIONS:
American Physical Society, Sigma Pi Sigma; Alpha Sigma Tau, Air & Waste Management Association