BRUCE L. BARRACLOUGH, Technical Staff Member in the Space Physics Team of the Space and Atmospheric Sciences Group (NIS-1) at Los Alamos National Laboratory. Mr. Barraclough joined the Laboratory in 1978, received his Candidate in Philosophy degree in Geochemistry from UCLA in 1983, and has been with the Space and Atmospheric Sciences Group since 1987. He is involved in all aspects of designing, developing and testing space flight sensors for plasma and neutron analysis. He is the Principal Investigator, Co-investigator or otherwise involved in a number of DOE and NASA missions, including geosynchronous satellites, Ulysses, CRRES, Cluster, Lunar Prospector, ACE, and Cassini. He has authored or co-authored numerous scientific papers on topics ranging from the abundance of helium in the solar wind to secondary electron emission from materials impacted by particle beams.