Cyclotrons you can visit

Of the 1,257 cyclotrons in the census, 31 offer public tours — 18 of them working machines, the rest preserved machines and museum displays, which is its own kind of visit: 7 of the entries below first ran before 1950, Lawrence’s first operating cyclotron among them. Another 67 can be visited by arrangement; the census directory marks those in its tours column. Each entry below links the facility’s own tour page, which is the authority on current hours, booking, and age limits — or see the public-tour machines on the map (the ★ markers).

Canada

IAMI TR-24 cyclotron Institute for Advanced Medical Isotopes (IAMI), TRIUMF, University of British Columbia campus · Vancouver · 24 MeV
Nordion CP-42 Cyclotron (TRIUMF) TRIUMF Applied Technology Group / Radiochemistry and Cyclotron Annex, operated for Nordion International Inc. (later MDS Nordion, now BWX Technologies), University of British Columbia campus · Vancouver · 42 MeV · decommissioned
TR-30 medical isotope cyclotron (TRIUMF/BWXT) TRIUMF (operated with BWXT Medical, formerly Nordion) · Vancouver · 30 MeV
TRIUMF 520 MeV Cyclotron TRIUMF (Canada's particle accelerator centre), University of British Columbia campus · Vancouver · 520 MeV
TRIUMF TR-13 Cyclotron TRIUMF Life Sciences Division · Vancouver · 13 MeV

China

HIRFL Sector Focusing Cyclotron (SFC) Institute of Modern Physics, Chinese Academy of Sciences · Lanzhou · 10 MeV
HIRFL Separated Sector Cyclotron (SSC) Institute of Modern Physics, Chinese Academy of Sciences · Lanzhou · 125 MeV

Czech Republic

NPI Řež TR-24 Cyclotron Nuclear Physics Institute of the Czech Academy of Sciences (ÚJF AV ČR), CANAM Laboratory of Cyclotrons and Fast Neutron Generators · Husinec-Řež · 24 MeV
U-120M Isochronous Cyclotron Nuclear Physics Institute of the Czech Academy of Sciences (NPI CAS) · Husinec-Řež · 37 MeV

Denmark

Niels Bohr Institute Cyclotron Danmarks Tekniske Museum, Helsingør (originally Institute for Theoretical Physics / Niels Bohr Institute, Copenhagen) · Helsingør · partial remains

France

CEA MIRCen cyclotron (Fontenay-aux-Roses) Commissariat a l'energie atomique et aux energies alternatives (CEA), MIRCen - Installation 509, 18 route du Panorama, 92260 Fontenay-aux-Roses · Fontenay-aux-Roses
Collège de France Cyclotron (Frédéric Joliot) Musée des Arts et Métiers, Paris (originally Laboratoire de Chimie nucléaire, Collège de France) · Paris · 7 MeV · museum piece
Cyceron cyclotron GIP Cyceron (UMS 3408, CNRS / CEA / Universite de Caen Normandie / CHU de Caen), Campus Jules Horowitz, Boulevard Henri Becquerel, Caen · Caen · 18 MeV
CYRCe (Cyclotron pour la Recherche et l'Enseignement) Institut Pluridisciplinaire Hubert Curien (IPHC, UMR 7178), CNRS / Universite de Strasbourg, campus de Cronenbourg, 23 rue du Loess, Strasbourg · Strasbourg · 25 MeV

Germany

First German Cyclotron (Bothe/Gentner, Heidelberg) Deutsches Museum, Munich (originally Kaiser Wilhelm Institute for Medical Research, Heidelberg) · Munich · museum piece
German Cancer Research Center (DKFZ) Cyclotron Deutsches Krebsforschungszentrum (DKFZ) · Heidelberg · 32 MeV · status unknown
Mainz Institute of Nuclear Chemistry MINItrace Johannes Gutenberg-Universitaet Mainz, Institut fuer Kernchemie · Mainz · 9.6 MeV

Japan

CYRIC HM12 cyclotron Cyclotron and Radioisotope Center (CYRIC), Tohoku University - now the Aobayama site of the Research Center for Accelerator and Radioisotope Science / RARIS (東北大学先端量子ビーム科学研究センター青葉山事業所) · Sendai · 12 MeV
Kyoto ICR 41-inch Cyclotron Institute for Chemical Research, Kyoto University · Uji · 14 MeV · museum piece
TIARA K110 AVF Cyclotron QST Takasaki Institute for Advanced Quantum Science (formerly JAERI/JAEA Takasaki) · Takasaki · 90 MeV

Spain

Centro Nacional de Aceleradores Cyclone 18/9 Centro Nacional de Aceleradores (CNA), Universidad de Sevilla / CSIC / Junta de Andalucia, Avda. Thomas Alva Edison 7, Isla de la Cartuja · Sevilla · 18 MeV

Switzerland

CERN 600 MeV Synchrocyclotron (SC) CERN (Synchrocyclotron exhibition, Meyrin site) · Meyrin · 600 MeV · museum piece
PSI Injector 1 Paul Scherrer Institute (PSI), formerly Schweizerisches Institut fuer Nuklearforschung (SIN) · Villigen · decommissioned
PSI Injector II Paul Scherrer Institute (PSI) · Villigen · 72 MeV
PSI Ring Cyclotron Paul Scherrer Institute (PSI) · Villigen · 590 MeV

United Kingdom

Liverpool 37-inch Cyclotron (James Chadwick) National Museums Liverpool (originally University of Liverpool) · Liverpool · partial remains

United States

Brookhaven TR-19 Cyclotron Brookhaven National Laboratory · Upton · 19 MeV
Harvard Cyclotron Laboratory Synchrocyclotron Harvard University (control console at the Collection of Historical Scientific Instruments) · Cambridge · 160 MeV · partial remains
Indiana University Cyclotron Facility (IUCF) Separated-Sector Cyclotron Indiana University, Center for Exploration of Energy and Matter (former IUCF building, now MESH) · Bloomington · 200 MeV · partial remains
Lawrence 37-Inch Cyclotron Lawrence Hall of Science, University of California, Berkeley · Berkeley · 8 MeV · museum piece
Lawrence First Operating Cyclotron (4.5-inch) Smithsonian National Museum of American History · Washington · 80 keV · museum piece

Virtual tours

These facilities publish tours a browser can take from anywhere. All links verified August 2026; the last two are accelerator-adjacent rather than cyclotron facilities.

TRIUMF — Discover Our Lab — interactive tour of the Vancouver site, including the Main Accelerator Building that houses the 520 MeV machine, which TRIUMF describes as the world's largest cyclotron by diameter; a companion TRIUMF 360 playlist adds 360° video.
CERN — virtual tours and talks — live hour-long guided virtual visits with CERN guides (scheduled sessions; registration required, none may be listed between rounds).
Cincinnati Children's Proton Therapy Center — cyclotron tour — 360° walkthrough of a working proton-therapy cyclotron and beamline.
IRAB, Barcelona — 360° tour — a radiopharmacy production facility built around an IBA Cyclone 18/9 (18 MeV protons / 9 MeV deuterons), photographed port by port.
Feinstein Institutes — cyclotron & radiochemistry tour — narrated photo tour of a hospital PET cyclotron vault, hot cells, and radiochemistry lab.
ANSTO National Research Cyclotron — video tour — walk-through of Australia's 30 MeV research and isotope-production cyclotron.
SLAC — self-guided virtual tour — interactive tour of the linear-accelerator laboratory (adjacent: a linac, not a cyclotron).
National MagLab — 360° virtual tour — the Tallahassee magnet laboratory, including spaces normally off limits (adjacent: magnets, not accelerators).