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Doppler-free two-photon induced fluorescence in the Lyman-alpha lines of H, D and T has been suggested previously as a local and isotope-selective diagnostic of the intrinsic neutral hydrogen densities in magnetically confined fusion plasmas. It is shown that the diagnostic potential of this method is significantly increased if it is combined with neutral atom beams whose characteristics are such that efficient production of thermal groundstate atoms via charge exchange reactions is achieved. Considerably deeper plasma regions than just the plasma edge can thus be probed and local, isotope-selective information is obtained on the more relevant ions rather than on the neutrals. Additional diagnostic possibilities, (eg those arising from the spectroscopic investigation of the beam particles themselves) are also discussed.

Additional information

Authors: VOSLAMBER D, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);MANDL W, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Report: EUR-CEA-FC-1607 EN (1997) 39pp.
Availability: Available from Association Euratom-CEA, CEN Cadarache, 13108 Saint-Paul-lez-Durance (FR)
Record Number: 199711373 / Last updated on: 1997-10-23
Original language: en
Available languages: en
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