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The data file AMJUEL: Additional Atomic and Molecular ... - eirene

The data file AMJUEL: Additional Atomic and Molecular ... - eirene

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2.7 Reaction 3.2.3o p + H2 → H + H + 2<br />

Effective ion conversion rate (charge exchange on H2 (old version before 2004)<br />

< σv >eff=< σv >H2(ν=0) + ∑14 ν=1 < σv >H2(ν) ·pH2(ν)<br />

Same vibrational distribution (as function of Te) as above. <strong>The</strong>refore: single parameter fit<br />

vs. Te, since vibrational distribution does not depend upon density, E0 is fixed (0.37 eV) <strong>and</strong><br />

Tp = Te = T .<br />

b0 -2.141025782776D+01 b1 2.159799627973D+00 b2 -2.275674008102D+00<br />

b3 5.413573872835D-01 b4 -6.391621888218D-03 b5 1.566655266221D-02<br />

b6 -1.068539042185D-02 b7 1.770824218105D-03 b8 -9.267718112477D-05<br />

Max. rel. Error: 10.9657 %<br />

Mean rel. Error: 6.2957 %<br />

same as 3-2-3, above, previous reaction, but here evaluated with old default H2 energy: E =<br />

0.37 eV, rather than the current choice of E =0.1 eV. Old <strong>data</strong> are kept here only for backward<br />

compatibility. (<strong>The</strong> old rate coefficient is mostly used in ITER applications <strong>and</strong> SOLPS4.x in<br />

general). Strictly this rate coefficient should be evaluated for stationary H2 (energy=0.0) to<br />

permit correct mass scaling in the Maxwellian averages.<br />

Competing process at low T: see above: dissociative electron attachment, process 2-2-17<br />

69

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