ISSN:
1434-6079
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We have determined absolute cross sections for electron capture into the quasi-degenerate4l states of He+ produced in collisions of He2+ on atomic hydrogen. The cross sections have been deduced by deconvoluting spatial HeII(n =4 →n=3) emission profiles. The measurements have been perfored in the impact energy range of 2−130 keV/amu. The results are compared with theory. In addition we discuss the relevance of these cross sections to α-particle diagnostics in fusion plasmas. At the JET tokamak the HeII(n=4 →n=3) emission can be used to determine related quantities like ion temperature, plasma rotation and local α-particle densities.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01426275