कण भौतिकी के त्वरकों की सूची
नीचे उन कण त्वरकों की सूची दी गयी है जो कण भौतिकी के प्रयोगों में प्रयुक्त होते हैं। कुछ आरम्भिक त्वरकों को भी इसमें शामिल किया गया है जो नाभिकीय भौतिकी में अनुसंधान के लिये प्रयुक्त हुए थे क्योंकि तब तक नाभिकीय भौतिकी और कण भौतिकी अलग-अलग नहीं थे।
आरम्भिक त्वरक
ये सभी केवल एक पुंज (beams) वाले थे और इनका लक्ष्य (targets) अपरिवर्तनीय (फिक्स्ड) था।
त्वरक | स्थान | कार्यारम्भ वर्ष | आकार | त्वरित किया जाने वाला कण | गतिज उर्जा | टीका तथा इससे प्राप्त खोजें |
---|---|---|---|---|---|---|
9-inch cyclotron | University of California, Berkeley | 1931 | Circular | H2+ | 1.0 MeV | Proof of concept |
11-inch cyclotron | University of California, Berkeley | 1932 | Circular | Proton | 1.2 MeV | |
27-inch cyclotron | University of California, Berkeley | 1932-1936 | Circular | Deuteron | 4.8 MeV | Investigated deuteron-nucleus interactions |
37-inch cyclotron | University of California, Berkeley | 1937-1938 | Circular | Deuteron | 8 MeV | Discovered many isotopes |
60-inch cyclotron | University of California, Berkeley | 1939- | 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 National Laboratory | 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)
अन्य प्रकार के आरम्भिक त्वरक
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) |
सिन्कोट्रॉन (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 | 1953-1967 | 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 | 1963-1979 | 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, injects polarized protons into RHIC |
स्थिर लक्ष्य वाले त्वरक
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 | SLAC National Accelerator Laboratory | 1966-present | 3 km linear accelerator | Electron/ Positron | 50 GeV | Repeatedly upgraded, used to feed PEP, SPEAR, SLC, and PEP-II | |
Fermilab Booster | Fermilab | 1970-present | Circular Synchrotron | Protons | 8 GeV | MiniBooNE | |
Fermilab Main Injector | Fermilab | 1995-present | Circular Synchrotron | Protons and antiprotons | 150 GeV | MINOS | |
Fermilab Main Ring | Fermilab | 1970-1995 | Circular Synchrotron | Protons and antiprotons | 400 GeV (until 1979), 150 GeV thereafter | ||
Super Proton Synchrotron | CERN | 1980-present | Circular Synchrotron | Protons and ions | 480 GeV | COMPASS, OPERA and ICARUS at Laboratori Nazionali del Gran Sasso | |
Bates Linear Accelerator | Middleton, MA | 1967-2005 | 500 MeV recirculating linac and storage ring | polarized electrons | 1 GeV | ||
Continuous Electron Beam Accelerator Facility (CEBAF) | Thomas Jefferson National Accelerator Facility, Newport News, VA | 1995-present | 6 GeV recirculating linac (upgrading to 12 GeV) | polarized electrons | 6 GeV | DVCS, PrimEx II, Qweak | First large-scale deployment of superconducting RF technology. |
ELSA | Physikalisches Institut der Universität Bonn, Germany | 1987-present | synchrotron and stretcher | (polarized) electrons | 3.5 GeV | Crystal Barrel | |
ISIS neutron source | Rutherford Appleton Laboratory, Chilton, | 1984-present | H- Linac followed by proton RCS | Protons | 800 MeV | Highest power operational pulsed proton beam in the world | |
MAMI | Mainz, Germany | 855 MeV accelerator | polarized electrons | ||||
Tevatron | Fermilab | 1983-present | Superconducting Circular Synchrotron | Protons | 980 GeV | ||
Spallation Neutron Source | Oak Ridge National Laboratory | 2006 - Present | Linear (335 m) and Circular (248 m) | Protons | 800 MeV - 1 GeV |
कोलाइडर (Colliders)
एलेक्ट्रॉन-पॉजिट्रॉन कोलाइडर
Accelerator | Location | Years of operation | Shape and circumference | Electron energy | Positron energy | Experiments | Notable Discoveries |
---|---|---|---|---|---|---|---|
AdA | Frascati, Italy; Orsay, France | 1961-1964 | Circular, 3 meters | 250 MeV | 250 MeV | Touschek effect (1963); first e+e- interactions recorded (1964) | |
Princeton-Stanford (e-e-) | Stanford, California | 1962-1967 | Two-ring, 12 m | 300 MeV | 300 MeV | e+e- pair production | |
VEP-1 (e-e-) | Novosibirsk, Soviet Union | 1964-1968 | Two-ring, 2.70 m | 130 MeV | 130 MeV | e-e- scattering; QED radiative effects confirmed | |
VEPP-2 | Novosibirsk, Soviet Union | 1965-1974 | Circular, 11.5 m | 700 MeV | 700 MeV | OLYA, ND, CMD | multihadron production (1966), e+e- -> phi (1966), e+e- -> gamma gamma (1971) |
SPEAR | SLAC | 1972-1990(?) | Mark I, Mark II, Mark III | Discovery of Charmonium states | |||
VEPP-2M | Novosibirsk, Soviet Union | 1974-2000 | Circular, 17.88 m | 700 MeV | 700 MeV | SND, CMD-2 | |
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, 2 km | 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 |
PEP | SLAC | 1980-1990(?) | Mark II | ||||
SLC | SLAC | 1988-1998(?) | Addition to SLAC Linac | 45 GeV | 45 GeV | SLD, Mark II | First linear collider |
LEP | CERN | 1989-2000 | Circular, 27 km | 104 GeV | 104 GeV | Aleph, Delphi, Opal, L3 | Only 3 light () weakly-interacting neutrinos exist, implying only three generations of quarks and leptons |
BEPC | China | 1989-2004 | Circular, 240m | 2.2 GeV | 2.2 GeV | Beijing Spectrometer (I and II) | |
VEPP-4M | Novosibirsk | 1994- | Circular, 366m | 6.0 GeV | 6.0 GeV | KEDR | |
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 | 1999-2009 | Circular, 3 km | 8.0 GeV | 3.5 GeV | Belle | Discovery of CP violation in B meson system |
DAΦNE | Frascati, Italy | 1999- | Circular, 98m | 0.7 GeV | 0.7 GeV | KLOE | Crab-waist collisions (2007) |
CESR-c | Cornell University | 2002-2008 | Circular, 768m | 6 GeV | 6 GeV | CHESS, CLEO-c | |
VEPP-2000 | Novosibirsk | 2006- | Circular, 24.4m | 1.0 GeV | 1.0 GeV | SND, CMD-3 | Round beams (2007) |
BEPC II | China | 2008- | Circular, 240m | 3.7 GeV | 3.7 GeV | Beijing Spectrometer III |
हैड्रॉन कोलाइडर (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 | |
Super Proton Synchrotron/SppS | CERN | 1981-1984 | Circular ring (6.9 km around) | Proton/ Antiproton | 270 GeV | 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 | Hexagonal rings (3.8 km circumference) | Polarized Proton/ Proton | 100-250 GeV | PHENIX, STAR |
Large Hadron Collider | CERN | 2008-present | Circular rings (27 km around) | Proton/ Proton | 7 TeV | ALICE, ATLAS, CMS, LHCb, LHCf, TOTEM |
एलेक्ट्रॉन-प्रोटॉन कोलाइडर
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 |
आयन कोलाइडर
Accelerator | Location | Years of operation | Shape and size | Ions collided | Ion energy | Experiments |
---|---|---|---|---|---|---|
Relativistic Heavy Ion Collider | Brookhaven National Laboratory, New York | 2000-present | Hexagonal rings (3.8 km circumference) | d-साँचा:SimpleNuclide279+; साँचा:SimpleNuclide229+-साँचा:SimpleNuclide229+; साँचा:SimpleNuclide279+-साँचा:SimpleNuclide279+ | 4.6-100 GeV per nucleon | STAR, PHENIX, Brahms, Phobos |
Large Hadron Collider, ion mode | CERN | 2008-present | Circular rings (27 km circumference) | साँचा:SimpleNuclide282+-साँचा:SimpleNuclide282+ | 2.76 TeV per nucleon | ALICE, ATLAS, CMS |
प्रकाश स्रोत
संकल्पनात्मक त्वरक (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.
बाहरी कड़ियाँ
- Judy Goldhaber, "Bevalac Had 40-Year Record of Historic Discoveries". October 9, 1992. https://web.archive.org/web/20110514040014/http://www.lbl.gov/Science-Articles/Archive/Bevalac-nine-lives.html
- High-energy collider parameters from the Particle Data Group
- Particle accelerators around the world
- Lawrence and his laboratory - a history of the early years of accelerator physics at Lawrence Berkeley Laboratory
- A brief history and review of accelerators (11 pgs, PDF file)[मृत कड़ियाँ]
- SLAC beamlines over time
- Accelerators and detectors named Mark at SLAC
- Lawson, J. D. (1997), "Early British Synchrotrons, An Informal History", https://web.archive.org/web/20101122110457/http://epubs.cclrc.ac.uk/bitstream/1297/RAL-TR-97-011.pdf [accessed 17 मई 2009]