Neutron rate interpretation for neutral beam heated tokamaksFunded under: FP2-FUSION 10C
It is of great interest to determine the deuteron temperature or density in tokamak fusion plasmas from total neutron rate measurements. This can be done easily during ohmic heating or H(0) injection, where the velocity distribution function of the plasma deuterons is Maxwellian. However, during D(0) injection the distribution function is highly non-Maxwellian and, until now, deuteron temperatures or densities could only be evaluated with the aid of complex codes. This report presents a fast interpretation code using a Fokker-Planck formalism, and identifies the parameter ranges where deuteron temperatures or densities can be determined from neutron rate measurements during neutral beam heating. As an example of its application, ion temperatures and densities are evaluated for JET discharges.
Bibliographic Reference: Report: JET-P(91)15 EN (1991) 11 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199111270 / Last updated on: 1994-12-02
Original language: en
Available languages: en