1969 experimental results from the stanford linear accelerator ce 10 20
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1969 57 years ago Selected Events October 20 3 sources

Experimental results from the Stanford Linear Accelerator Center were published showing that protons were composed of smaller particles, the first evidence of quarks.

On October 20, in the year 1969, Experimental results from the Stanford Linear Accelerator Center were published showing that protons were composed of smaller particles, the first evidence of quarks. This event is recorded as a Selected Events event in the history of October 20, a notable event in this corner of history.

SLAC National Accelerator Laboratory, originally named the Stanford Linear Accelerator Center, is a federally funded research and development center in Menlo Park, California, United States. Founded in 1962, the laboratory is now sponsored by the United States Department of Energy and administered by Stanford University. It is the site of the Stanford Linear Accelerator, a 3.2 km (2 mi) linear accelerator constructed in 1966 that could accelerate electrons to energies of 20 GeV, and later up to 50 GeV.

Key Facts

  • This event took place on October 20, 1969 (AD era).
  • It is categorised as a Selected Events event in recorded history.
  • Referenced in 3 Wikipedia articles.
  • The event is associated with a specific geographical location (see map below).
  • Wikipedia source last updated on 20 September 2026.

On This Date in History

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Notable Deaths 2015 Oct 20 Ian Steel, Scottish cyclist and manager (born 1928)
Notable Deaths 2014 Oct 20 René Burri, Swiss photographer and journalist (born 1933)
Notable Deaths 2014 Oct 20 Oscar de la Renta, Dominican-American fashion designer (born 1932)
Notable Deaths 2014 Oct 20 Christophe de Margerie, French businessman (born 1951)
Notable Deaths 2013 Oct 20 Jovanka Broz, Croatian-Serbian colonel (born 1924)
Notable Deaths 2013 Oct 20 Don James, American football player and coach (born 1932)
Notable Deaths 2013 Oct 20 Lawrence Klein, American economist and academic, Nobel Prize laureate (born 1920)
Notable Deaths 2013 Oct 20 Joginder Singh, Kenyan race car driver (born 1932)
Notable Deaths 2013 Oct 20 Larri Thomas, American actress and dancer (born 1932)
Notable Deaths 2013 Oct 20 Sid Yudain, American journalist, founded Roll Call (born 1923)
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Notable Deaths 2012 Oct 20 Paul Kurtz, American philosopher and academic (born 1925)
Notable Deaths 2012 Oct 20 Dave May, American baseball player (born 1943)
Notable Deaths 2012 Oct 20 John McConnell, American activist, created Earth Day (born 1915)
Notable Deaths 2012 Oct 20 E. Donnall Thomas, American physician and academic, Nobel Prize laureate (born 1920)
Notable Deaths 2012 Oct 20 Raymond Watson, American businessman (born 1926)
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This article draws on content from Wikipedia, available under CC BY-SA 4.0.

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