BRIAN R. DENNIS

POSITION		Research Astrophysicist, Solar Physics Laboratory, Code 671
		Heliophysics Science Division Sciences and Exploration Directorate
		NASA Goddard Space Flight Center
EDUCATION		B. Sc. (Physics), University of Leeds, England, 1961
		Ph. D. (Cosmic Ray Physics), University of Leeds, England, 1964
PROFESSIONAL SPECIALTY		X-Ray and Gamma-Ray Astronomy and Solar Physics
PREVIOUS POSITIONS		1964 - 1967	Research Associate, University of Rochester
		1967 - 1969	NRC Research Fellow, GSFC
MAJOR RESPONSIBILITIES
1997 - Present	Mission Scientist and Co-I on the Ramaty High Energy Solar Spectroscopic Imager (RHESSI)
2000 - Present	COTR of SBIR contract with Mikro Systems, Inc. to make multi-grid arrays.
2001 - Present	ATR on SSAI contract for Solar Flare X-ray Data Support
1998 - 2001	ATR on Raytheon contract for Solar Flare X-ray Data Support
2001	Co-I on MIDEX proposal for the Heliospheric Explorer (HELIX)
2000	Co-I on SMEX proposal for the Cyclotron/Nuclear Explorer (Cyclone)
1996	Co-I on MIDEX Proposal for the High Energy Solar Spectroscopic Imager (HESSI)
1994 - 1999	Co-I for the X-Ray Spectrometer (XRS) on the Small Spacecraft Technology Initiative (SSTI) Clark mission
1991 - 1999	PI of a Compton Gamma Ray Observatory (CGRO) Guest Investigator Program
1991 - 1996	PI for the X‑Ray Spectrometers on the Argentinean Satelite de Aplicaciones Cientificas-B (SAC‑B)
1991 - 1995	Study Scientist for the High Energy Solar Imager (HESI - formerly HESP)
1989 - 1995	Co-chair with Richard Canfield of the Max ’91 Program
1982 - 1990	PI of the Hard X-Ray Burst Spectrometer (HXRBS) on the Solar Maximum Mission

AFFILIATIONS

American Astronomical Society - Solar Physics Division & High Energy Astrophysics Division

American Physical Society

International Astronomical Union

Brief Biography:

Dr. Dennis was educated in England at Queen Elizabeth's Grammar School, Horncastle, Lincolnshire, and at the University of Leeds, Yorkshire. He received his Ph.D. at Leeds in 1964 and immediately moved to the United States to become a research associate at the University of Rochester, New York. He became a National Research Council Resident Research Associate at Goddard Space Flight Center in 1967, a government employee at GSFC as an astrophysicist in 1969, and a U.S. citizen in 1975. Dr. Dennis has been involved in designing, building, operating, and analyzing data from several X-ray spectrometers for observations of solar flares and cosmic X-ray sources. He was Principal Investigator (PI) of the Hard X-Ray Burst Spectrometer on the Solar Maximum Mission (SMM) that recorded spectra for over 12,000 flares. He co-chaired the Max ’91 program to coordinate observations of solar activity during the solar maximum centered around 1991. He is the Mission Scientist and lead Co-I of the High Energy Solar Spectroscopic Imager (HESSI), a Small Explorer (SMEX) mission launched on February 5, 2002, and now renamed the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI).