HERA electron-proton collider
Barger, Vernon D. Department of Physics, University of Wisconsin–Madison, Madison, Wisconsin.
Last reviewed:February 2019
Show previous versions
- HERA facility
- HERA experiments
- Related Primary Literature
- Additional Reading
The first, and so far only, electron-proton particle accelerator to have ever operated, and which studied the internal structure of protons. HERA (Hadron-Electron-Ring Accelerator), the largest research instrument in Germany, was located at DESY (Deutsches Elektronen-Synchrotron) in Hamburg (Fig. 1). Using electromagnets, it accelerated low-mass particles called electrons into collisions with heavier particles, called protons, inside a 3.9-mi (6.3-km) underground tunnel. The electrons, which have only 1/1836th the mass of the proton, served as probes of the inner structure of the much more massive protons. The accelerator ran from 1992 until 2007, though its data analysis continues to this day. See also: Electron; Elementary particle; Particle accelerator; Proton
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 45 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information