Abstract
Charge‐exchange measurements during ICRF‐only and combined ICRF (2MW) and NBI (7 MW) heating have been made with vertically‐viewing mass‐resolving analyzers. We have observed an enhancement of the deuterium spectrum above the beam injection energy, providing evidence of second harmonic acceleration of beam ions by the ICRF waves. The measured spectra are in resonable agreement with the predictions of a comprehensive ICRF+NBI code, given the measurement error bars and the simulation uncertainties due to the hydrogen concentration, RF power profile, and effects of sawteeth. In the ICRF‐only case, we present measurements from a toroidal field scan which show that the flux of 150 keV H‐minority ions varies by a factor of 7 and is largest when the resonance layer is over the detector sightline. Future experiments are proposed to extend the results obtained here.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
