ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
We present measurements of the energy distribution function of fusion α particles in the range 0.8≤E(MeV)≤3 in hot-ion H-mode plasmas, using a NPA. Two contributions to the measured atomic flux are distinguished: (i) alpha particles due to direct neutralization effected in double charge–exchange reactions with intrinsic plasma impurities C4+, Be2+, and He0, and (ii) MeV energy deuterons formed by elastic scattering on fusion alpha particles, their neutralization effected by reactions with C5+, Be3+, He1+, and D0. Application of the impurity induced neutralization model to the measurements is presented. Deduced fusion α particle and knock-on deuteron energy distribution functions are compared with Fokker–Planck simulations in which measured time-dependent α-particle source and collisionality are used. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1149450
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