Radiative Plasma Cooling

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September 2009

These data are important for determination of ionization balance and radiation losses. It would be very useful to formulate updated and new tables of cooling rates.

Plasma core region

  • Electron impact processes (excitation, ionization, radiative and dielectronic recombination) of medium- and high-Z impurities (W, Ar, Ne, Kr, Xe are highest priority, with V, Ti, Cr, Fe, Ni, Mo of lower priority). Pertinent temperature range is from ~1 keV to ~30 keV. A large amount of data exists for Ti and Fe, but dielectronic recombination rate coefficients are not adequate for L-shell and M-shell ions even for Fe. The CRP on "Atomic Data for Heavy Element Impurities in Fusion Reactors" addressed some of these issues.

Plasma edge region

  • Data are needed for edge temperature (threshold to ~500eV) charge exchange processes among intrinsic impurities and plasma components:
  • Collisions of Xq+ (X = W, Be, C, He, N, O, Li, B of highest priority, with Cl, V, Ti, Cr, Fe, Ni, Mo of lower priority) with H, H2, He, H+ and H2+ including state selective electron capture.
  • Data are needed for all processes of N, N2, Kr, Ne, Ar and Xe with e, H, H+, H2, H2+, He+, and H- (for the proposed radiative cooling scheme of divertors and radiative mantle).


October 2007

Plasma core region

  • Electron impact processes (excitation, ionization, radiative and dielectronic recombination) of medium- and high-Z impurities (Ti, V,Ni, Cr, Fe, Mo, W). Pertinent energy range: is from 100 eV to 30 keV). A large amount of data exists for Ti and Fe, but dielectronic recombination rate coefficients are not adequate for L-shell and M-shell ions even for Fe. The new CRP on "Heavy elements" will address this topic.

Plasma edge region

  • Charge exchange collisions of Xq+ (X = Cl, Ti, Ni, Cr, Fe, Mo, W, V) with H, H+ and He2+. Pertinent energy range: is from 1 eV (or threshold) to 500 eV.
  • Collisions of Xq+ (q >= 5, X as above) with H, He, H2, including state selective electron capture.
  • All processes of N, N2, Kr, Ne, Ar and Kr-ions with e, H, H+, H2, H2+, He+, He2+ and H- (for the proposed radiative cooling scheme of divertors).


November 2005

Plasma core region

  • Electron impact processes (excitation, ionization, radiative and dielectronic recombination) of medium- and high-Z impurities (X = Ti, Ni, Cr, Fe, Mo, W, Ga, V) (Pertinent energy range: from a few keV to 30 keV). A large amount of data exists for Ti and Fe, but dielectronic recombination rate coefficients are not adequate for L-shell and M-shell ions even for Fe.

Plasma edge region

  • Charge exchange collisions of Xq+ (X as above) with H, H+ and He2+ (Pertinent energy range: from 1 eV (or threshold) to 500 eV), particularly complete and consistent data sets. Collisions of Xq+ (q >= 5, X as above) with H, He, H2, including state- selective electron capture.
  • All processes of Kr, Ne, Ar and Kr-ions with e, H, H+, H2, H2+, He+, He2+ and H- (for the proposed Kr, Ne, Ar radiative cooling scheme of divertors). Paper in preparation on N2.
  • Complete collisional database for N, N2, Ne and Ar (for divertor radiation enhancement).
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