FERMI NATIONAL ACCELERATOR LABORATORY / US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY FERMI NATIONAL ACCELERATOR LABORATORY / US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY
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Superconducting radio-frequency cavity. Technician assembling a superconducting radio-frequency (SRF) cavity device in a clean room at Fermi National Accelerator Laboratory (Fermilab), Illinois, USA. Niobium is the material of choice for building superconducting radio-frequency cavities. The best cavities can propel particles with an electric field in excess of 30 million volts per metre. To protect the polished, ultra-clean surfaces inside the cavities, technicians assemble them under clean room condition. Photographed on 22 August 2014.
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