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Shnidman, A.

Paper Title Page
THPAS084 Calculation of the Charge-changing Cross Sections of Ions or Atoms colliding with Fast Ions using the Classical Trajectory Method 3678
  • A. Shnidman
    PU, Princeton, New Jersey
  • R. C. Davidson, I. Kaganovich
    PPPL, Princeton, New Jersey
  Funding: Research supported by the U. S. Department of Energy under the auspices of the Heavy Ion Fusion Science Virtual National Laboratory.

Evaluation of ion-atom charge-changing cross sections is needed for many accelerator applications. The validity of the classical trajectory approximation has been studied by comparing the results of simulations with available experimental data and full quantum-mechanical calculations [1]. Additionally, a theoretical criterion has been developed for the validity of the classical trajectory approximation [2]. For benchmarking purposes, a Classical Trajectory Monte Carlo simulation (CTMC) is used to calculate ionization and charge exchange cross sections for most simple, hydrogen and helium targets in collisions with various ions. The calculated cross sections compare favorably with the experimental results for projectile velocities near the projectile velocity corresponding to the maximum of cross section as a function of projectile velocity. At higher or lower velocities, quantum-mechanical effects become more significant and the CTMC results agree less well with the experimental values of the cross sections.

[1] I. D. Kaganovich, et al., , New Journal of Physics 8, 278 (2006).
[2] Igor D. Kaganovich, et al., Nucl. Instr. and Methods A 544, 91(2005).