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Yuan, Y.J.

Paper Title Page
TUPD012 A Characteristics Study for Cold Ion Beam Momentum Spread at HIRFL-CSR 1946
 
  • L.J. Mao, G.H. Li, J. Li, J.W. Xia, J.C. Yang, X.D. Yang, Y.J. Yuan
    IMP, Lanzhou
 
 

Two electron cooling devices have been used at HIRFL-CSR in order to provide high quality heavy ion beams for nuclear and atomic research. The momentum spread is one of the most important characteristics of the beam quality. At HIRFL-CSR, the momentum spread is measured directly with the aid of longitudinal Schottky spectra system. In this paper, the measurements for various ion species are presented. At relatively high intensity, longitudinal Schottky spectra is double peak due to collective phenomena and the momentum spread can be obtained by fitting the spectra. The dependence of momentum spread on stored particle number is proportional to N**a. Moreover, the heating factor was investigated after switching off the electron cooling. The residual gas scattering, the intrabeam scattering and instabilities are studied according to the measured data.

 
THYMH01 Lanzhou Cooler Storage Ring Commissioning 3611
 
  • J.W. Xia, Y. Liu, L.J. Mao, R.S. Mao, J.C. Yang, Y.J. Yuan
    IMP, Lanzhou
 
 

CSR has recently made significant progress in commissioning a variety of light to heavy ion in the cooler ring. Also, carbon therapy was successfully carried out. A significant achievement is the energy modulation extraction using slow extraction realizing 3D conformal treatment.

 

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