Such machines include particle accelerators and tokamak reactors. The most powerful modern particle accelerators use versions of the synchrotron design. These devices act like small particle accelerators shooting conductive nanoparticles out into space. They are used in particle accelerators and MRI machines. Californium is produced in nuclear reactors and particle accelerators. Polonium and livermorium are most available in particle accelerators. Studies of heavier quarks are conducted in artificially created conditions, such as in particle accelerators. Artificial sources include nuclear reactors, particle accelerators, and x-ray tubes. It is used in conjunction with high-performance graphics accelerators, network devices and in some supercomputers. Ions, catalysts, brighteners and accelerators can be measured. Antihydrogen is produced artificially in particle accelerators. Pions can also be produced in large amounts in particle accelerators. Flerovium only occurs in particle accelerators. Some HSM systems are also hardware cryptographic accelerators. Two circular particle accelerators run inside the tube.