Herbert S. Bridge

Herbert Sage Bridge
Bridge in c. 1980
Born(1919-05-23)May 23, 1919
Berkeley, California, U.S.
DiedAugust 30, 1995(1995-08-30) (aged 76)
Boston, Massachusetts, US
Alma materUniversity of Maryland (BSc 1941), Massachusetts Institute of Technology (PhD 1950)
Known forspacecraft plasma science instruments
Scientific career
Fieldscosmic rays, space plasma physics
InstitutionsMassachusetts Institute of Technology
ThesisProduction of bursts by penetrating particles (1950)
Doctoral advisorBruno Rossi

Herbert Sage Bridge (1919-1995) was an American physicist who developed the first instruments to measure plasma in interplanetary space and made significant contributions to cosmic ray research. He earned his PhD in physics from MIT in 1950 under Bruno Rossi's supervision after working on wartime projects at Princeton and Los Alamos Laboratory. His early research focused on cosmic rays. Beginning in 1958, Bridge developed the modulated-grid Faraday cup with Rossi, creating the first instrument capable of detecting dilute space plasma. The instrument flew aboard Explorer 10 in 1961 and was adapted for plasma science experiments on multiple spacecraft, including the Voyager program and Parker Solar Probe.