Diagnostics and Measurements of ⁷Li Ion Beam on the New Terminal at HI-13 Tandem Accelerator for Radiobiological Application

Key words: 
• 7Li ions /
• high LET radiation /
• beam uniformity /
• fluence accuracy

Abstract: ⁷Li ion with high linear energy transfer (LET) radiation has been used in radiobiological research, takes main effect in Boron Neutron Capture Therapy and is applied in radiation mutagenic breeding. This experiment was carried on the new terminal established for radiobiological application, located at the end of R20 branch beam line of HI-13 tandem accelerator. The beam qualities of 7Li ions of 43MeV generated by HI-13 tandem accelerator, including spot size and uniformity and particle fluence accuracy were measured using different detection methods. The results showed that beam uniformity was over 90% at 5cm×5cm area, the flux of S1 and M3 had a good linear relationship as particle flux ranged from 4.2×104 particles/cm2/s to 1.5×105 particles/cm2/s, and particle fluence accuracy was better than 90%. All the results showed that the beam qualities of 7Li ions finely met the basic requirements for radiation biological experiment. It provides important method to study biological effects for fundamental research and tumor therapy or radiation mutagenic breeding application associated with ⁷Li ions.