Accelerator and Beam Physics Laboratory

Summary

　We are conducting research on beam physics, such as research into the beam dynamics of electron linear accelerators and 1.3 GeV electron synchrotron (BST ring), the generation of ultrashort pulse electron beams and terahertz coherent radiation using the test accelerator (t-ACTS).

　At t-ACTS, the ultrashort electron bunches of less than 100 femtoseconds can be generated by using a specially designed rf electron gun that can control the longitudinal phase-space distribution of the electron beam and　applying the velocity bunching in a traveling-wave accelerating structure. With this ultrashort pulse electron beam, we are conducting research on several coherent synchrotron radiation sources with different generation　mechanisms. In the generation of high-brightness, narrow-band coherent terahertz light using an undulator composed of permanent magnets, we have succeeded in converting linearly polarized coherent undulator radiation　into left-right circularly polarized and elliptically polarized radiation. In addition, in collaboration with the High Energy Accelerator Research Organization (KEK) and the National Institute for Materials Science (NIMS), we are　conducting research and development of niobium-tin superconducting rf cavities that do not require liquid helium cooling. In the future, we hope to apply the technology of niobium-tin superconducting rf cavities to beam　utilization and applications such as contaminated water purification and production of medical radioisotopes.

STAFF

Associate Professor　Fujio Hinode

  • Accelerator Science, Beam Physics
  • TEL：022-743-3424
  • E-mail：hinode*raris.tohoku.ac.jp (Please replace * with @)
  • researchmap：https://researchmap.jp/F.Hinode

Associate Professor　Shigeru Kashiwagi

Research Professor　Hiroyuki Hama