List of accelerators in particle physics

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A list of particle accelerators used for particle physics experiments. Some early particle accelerators that more properly did nuclear physics, but existed prior to the separation of particle physics from that field, are also included. Although a modern accelerator complex usually has several stages of accelerators, only accelerators whose output has been used directly for experiments are listed.

Contents

[edit] Early accelerators

These all used single beams with fixed targets. They tended to have very briefly-run, inexpensive, and unnamed experiments.

[edit] Cyclotrons

Accelerator Location Years of
operation		 Shape Accelerated Particle Kinetic
Energy		 Notes and discoveries made
9-inch cyclotron UC Berkeley 1931 Circular H2+ 1.0 MeV Proof of concept
11-inch cyclotron UC Berkeley 1932 Circular Proton 1.2 MeV
27-inch cyclotron UC Berkeley 1932-1936 Circular Deuteron 4.8 MeV Investigated deuteron-nucleus interactions
37-inch cyclotron UC Berkeley 1937-1938 Circular Deuteron 8 MeV Discovered many isotopes
60-inch cyclotron UC Berkeley 1939-1941 Circular Deuteron 16 MeV Discovered many isotopes
184-inch cyclotron Berkeley Rad Lab[1] 1942- Circular Various >100 MeV Research on uranium isotope separation
Calutrons Oak ridge,
Tennessee		 1943- "Horseshoe" Uranium
nuclei		 Used to separate isotopes for the Manhattan project

[1] First accelerator built at the current Lawrence Berkeley National Laboratory site, then known as the Berkeley Radiation Laboratory ("Rad Lab" for short)

[edit] Other early accelerator types

Accelerator Location Years of
operation		 Shape
and size		 Accelerated
particle		 Kinetic
Energy		 Notes and discoveries made
Cockcroft and Walton's
electrostatic accelerator		 Cavendish Laboratory 1932 See Cockroft-
Walton generator		 Proton 0.7 MeV First to artificially split the nucleus (Lithium)

[edit] Synchrotrons

Accelerator Location Years of
operation		 Shape
and size		 Accelerated
particle		 Kinetic
Energy		 Notes and discoveries made
Cosmotron Brookhaven
National Laboratory		 1953-1968 Circular ring
(72 meters around)		 Proton 3.3 GeV Discovery of V particles, first artificial production of some mesons.
Birmingham
Synchrotron		 University of Birmingham 1939-? Proton 1 GeV
Bevatron Berkeley Rad Lab ie LBNL 1954-~1970 "Race track" Proton 6.2 GeV strange particle experiments, Antiproton and antineutron discovered, resonances discovered
Bevalac, combination of SuperHILAC linear accelerator, a diverting tube, then the Bevatron Berkeley Rad Lab ie LBNL ~1970-1993 linear accelerator followed by "Race track" any and all sufficiently-stable nuclei could be accelerated observation of compressed nuclear matter. Depositing ions in tumors in cancer research.
Saturne Saclay, France 3 GeV
Synchrophasotron Dubna, Russia December 1949-present 10 GeV
Zero Gradient
Synchrotron		 Argonne National
Laboratory		 12.5 GeV
Proton Synchrotron CERN 1959-present Circular ring
(600 meters around)		 Proton 28 GeV Used to feed ISR, SPS, LHC
Alternating Gradient Synchrotron Brookhaven
National Laboratory		 1960- Proton 33 GeV J/Ψ, muon neutrino, CP violation in kaons

[edit] Fixed-target accelerators

More modern accelerators that were also run in fixed target mode; often, they will also have been run as colliders, or accelerated particles for use in subsequently-built colliders.

Accelerator Location Years of
operation		 Shape
and size		 Accelerated
particle		 Kinetic
Energy		 Experiments Notes
SLAC Linac Stanford Linear
Accelerator center		 1966-present 3 km linear
accelerator		 Electron/
Positron		 50 GeV Repeatedly upgraded, used to feed PEP, SPEAR, SLC, and PEP-II
Fermilab Main Ring Fermilab
Super Proton Synchrotron CERN
Bates Linear Accelerator Middleton, MA 500 MeV linac and storage ring polarized electrons
CEBAF Jefferson Laboratory, Newport News, VA 5.75 GeV recirculating linac (upgrading to 12 GeV) polarized electrons
MAMI Mainz, Germany 855 MeV accelerator polarized electrons
Tevatron Fermilab
Spallation Neutron Source Oak Ridge National Laboratory 2006 - Present Linear (335 m) and Circular (248 m) Protons 800 MeV -
1 GeV

[edit] Colliders

[edit] Electron-positron colliders

Accelerator Location Years of
operation		 Shape
and size		 Electron
energy		 Positron
energy		 Experiments Notable Discoveries
SPEAR SLAC Mark I, Mark II, Mark III Discovery of Charmonium states
PEP SLAC Mark II
SLC SLAC Addition to
SLAC Linac		 45 GeV 45 GeV SLD, Mark II
LEP CERN 1989-2000 Circular, 27km 104 GeV 104 GeV Aleph, Delphi, Opal, L3 Only 3 light (m \le m_Z /2) weakly-interacting neutrinos exist, implying only three generations of quarks and leptons
DORIS DESY 1974-1993 Circular, 300m 5 GeV 5 GeV ARGUS, Crystal Ball, DASP, PLUTO Oscillation in neutral B mesons
PETRA DESY 1978-1986 Circular, 2km 20 GeV 20 GeV JADE, MARK-J, PLUTO, TASSO Discovery of the gluon in three jet events
CESR Cornell University 1979-2002 Circular, 768m 6 GeV 6 GeV CUSB, CHESS, CLEO, CLEO-2, CLEO-2.5, CLEO-3 First observation of B decay, charmless and "radiative penguin" B decays
CESR-c Cornell University 2002-? Circular, 768m 6 GeV 6 GeV CHESS, CLEO-c
PEP-II SLAC 1998-2008 Circular, 2.2 km 9 GeV 3.1 GeV Babar Discovery of CP violation in B meson system
KEKB KEK 1999-2008? Circular, 3km 8.0 GeV 3.5 GeV Belle Discovery of CP violation in B meson system
VEPP-2000 Novosibirsk 2006- Circular, 24m 1.0 GeV 1.5 GeV
VEPP-4M Novosibirsk 1994-? Circular, 366m 6.0 GeV 6.0 GeV
BEPC China 1989-? Circular, 240m 2.2 GeV 2.2 GeV BES
DAΦNE Frascati, Italy 1999- Circular, 98m 0.7 GeV 0.7 GeV KLOE
VEPP-4M Novosibirsk 1994-? Circular, 366m 6.0 GeV 6.0 GeV

[edit] Hadron colliders

Accelerator Location Years of
operation		 Shape
and size		 Particles
collided		 Beam
energy		 Experiments
Intersecting
Storage Rings		 CERN 1971-1984 Circular rings
(948 m around)		 Proton/
Proton		 31.5 GeV
Sp\overline{p}S (Super
Proton Synchrotron)		 CERN 1981-1984 Circular ring
(6.9 km around)		 Proton/
Antiproton		 UA1, UA2
Tevatron
Run I		 Fermilab 1992-1995 Circular ring
(6.3 km around)		 Proton/
Antiproton		 900 GeV CDF, D0
Tevatron
Run II		 Fermilab 2001-present Circular ring
(6.3 km around)		 Proton/
Antiproton		 980 GeV CDF, D0
RHIC
proton+proton mode		 BNL 2000-present Circular ring
(3.8 km)		 Proton/
Proton		 100 GeV PHENIX, STAR
Large Hadron
Collider		 CERN 2007 (planned) Circular rings
(27 km around)		 Proton/
Proton		 7 TeV ALICE, ATLAS, CMS, LHCb, TOTEM

[edit] Electron-proton colliders

Accelerator Location Years of
operation		 Shape
and size		 Electron
energy		 Proton
energy		 Experiments
HERA DESY 1992(-2007) Circular ring
(6336 meters around)		 27.5 GeV 920 GeV H1, ZEUS, HERMES, HERA-B

[edit] Ion colliders

Accelerator Location Years of
operation		 Shape
and size		 Ions
collided		 Ion
energy		 Experiments
Relativistic Heavy Ion Collider Brookhaven National Laboratory, New York 2000- 3.8 km Au-Au; Cu-Cu; d-Au; polarized pp 0.1 TeV per nucleon STAR, PHENIX, Brahms, Phobos
Large Hadron
Collider, ion mode		 CERN 2007 (planned) Circular rings
(27 km around)		 Pb-pb 2.76 TeV per nucleon ALICE

[edit] Light sources

Main article: List of synchrotron radiation facilities

[edit] Hypothetical accelerators

Besides the real accelerators listed above, there are hypothetical accelerators often used as hypothetical examples or optimistic projects by particle physicists.

  • Planckatron is a term often used colloquially by particle physicists to describe the accelerator with a center-of-mass energy of the order of the Planck scale. It is estimated that the radius of the Planckatron has to be roughly the radius of the milky way.
  • Eloisatron (Eurasiatic Long Intersecting Storage Accelerator) was a project of INFN headed by Antonio Zichichi at the Ettore Majorana Foundation in Erice, Sicily. The center-of-mass energy was planned to be 200 TeV, and the size was planned to span parts of Europe and Asia.
  • Fermitron was an accelerator sketched by Enrico Fermi on a notepad in the 1940s proposing an accelerator in stable orbit around the earth.
  • Arguably also in this category falls the Zevatron, a term used to describe hypothetical sources for ultra-high-energy cosmic rays.

[edit] External links

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