Author/Authors :
Zhu، نويسنده , , X.L. and Wen، نويسنده , , W.Q. and Ma، نويسنده , , X. and Li، نويسنده , , J.Y. and Feng، نويسنده , , W.T. and Zhang، نويسنده , , R.T. and Wang، نويسنده , , Enliang and Yan، نويسنده , , S. and Guo، نويسنده , , D.L. and Hai، نويسنده , , B. and Qian، نويسنده , , D.B. and Zhang، نويسنده , , P. and Xu، نويسنده , , S. and Zhao، نويسنده , , D.M. and Yang، نويسنده , , J. and Zhang، نويسنده , , D.C. and Li، نويسنده , , B. and Gao، نويسنده , , Y. and Huang، نويسنده , , Z.K. and Wang، نويسنده , , H.B.، نويسنده ,
Abstract :
To prepare the upcoming laser cooling of relativistic C3+ ion beams at the experimental Cooler Storage Ring (CSRe), a novel experiment was performed using a reaction microscope to determine the ratio of C3+ ions in mixed ion beams of C3+ and O4+ that are produced by an Electron Cyclotron Resonance Ion Source (ECRIS). The mixed ion beams at an energy of 4 keV/u were directed to collide on a supersonic helium gas target. Using the single-electron capture channel and the coincidence technique, the fractions of C3+ and O4+ ions in the primary beam were obtained. Using different injection gases for ECRIS, including O2, CO, CO2, and CH4, at a fixed radio-frequency power of 300 W, the measured results showed that the fraction of C3+ ions was greater than 70% for the injection gases of CO and CO2. These measured results are very important and helpful for the upcoming laser cooling experiments.
Keywords :
Reaction microscope , C3+ ratio of equal mass-to-charge beam , Laser cooling experiment , ECRIS
