Elastic and Related Cross Sections for Low-Energy Collisions among Hydrogen and Helium Ions, Neutrals, and Isotopes

  • D. R. Schultz
  • S. Yu. Ovchinnikov
  • S. V. Passovets


In the pursuit of ever more realistic, accurate models and diagnostic methods for fusion energy research, complete data bases of heavy-particle cross sections for excitation, ionization, charge transfer, and recombination have been sought for many years. Great progress has been made along these lines, but the type of reactions and the collision energy range investigated have been dictated primarily by the need to understand the physics of the central core plasma in such magnetically confined plasma devices as tokamaks. Contemporary interest in developing so-called “next-step” experimental reactors, such as ITER (International Thermonuclear Experimental Reactor) has, however, highlighted the need for the study of new atomic and molecular collision regimes. As described in great detail in the present volume and elsewhere, 1 engineering and physics issues are focused on (i) the edge plasma, which must be tailored to suppress the ingress of impurities into the core and to entrain them, and (ii) the divertor, which will be used for hydrogen recycling and heat (power) and particle (impurities, helium ash) exhaust. Because these plasma regimes are characterized by greatly lower temperatures and higher densities than the core, correspondingly different atomic, and even molecular, reactions play crucial roles.


Momentum Transfer Total Cross Section Elastic Scattering Differential Cross Section Potential Energy Curve 
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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • D. R. Schultz
    • 1
  • S. Yu. Ovchinnikov
    • 2
  • S. V. Passovets
    • 2
  1. 1.Physics DivisionOak Ridge National LaboratoryOak RidgeUSA
  2. 2.Department of Physics and AstronomyUniversity of TennesseeKnoxvilleUSA

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