Near midplane scintillator-based fast ion loss detector on DIII-D
نویسندگان
چکیده
منابع مشابه
Fast Ion Loss Diagnostics on DIII-D
Sawteeth and tearing modes affect fast ion confinement, while large fast ion densities can drive collective instabilities, including toroidicity-induced Alfvén eigenmodes. Losses of energetic alpha particles in ITER will reduce the alpha heating available to reach ignition, and have the potential to cause major damage to the first wall of ITER. Measurements of the internal mode structures of th...
متن کاملModeling the response of a fast ion loss detector using orbit tracing techniques in a neutral beam prompt-loss study on the DIII-D tokamak.
A numerical model describing the expected measurements of neutral beam prompt-losses by a newly commissioned fast ion loss detector (FILD) in DIII-D is presented. This model incorporates the well understood neutral beam deposition profiles from all eight DIII-D beamlines to construct a prompt-loss source distribution. The full range of detectable ion orbit phase space available to the FILD is u...
متن کاملFast Wave Current Drive on Diii - D
The physics of electron heating and current drive with the fast magnetosonic wave has been demonstrated on DIU-D , in reasonable agreement with theoretical modeling. A recently completed upgrade to the fast wave capability should allow f id noninductive current drive in steady state advanced confinement discharges and provide some current density profile control for the Advanced Tokamak Program...
متن کاملAlfvén Instabilities in Diii-d: Fluctuation Profiles, Thermal-ion Excitation and Fast-ion Transport
New fluctuation and fast-ion diagnostics provide a wealth of data about fast-ion instabilities during neutral beam injection into DIII-D. Toroidicity-induced Alfvén eigenmodes (TAE), reversed-shear induced Alfvén eigenmodes (RSAE), and compressional Alfvén eigenmodes are observed. Owing to differing spatial sensitivities, the measured spectra differ greatly for different diagnostics. In plasmas...
متن کاملConceptual design of the ITER fast-ion loss detector.
A conceptual design of a reciprocating fast-ion loss detector for ITER has been developed and is presented here. Fast-ion orbit simulations in a 3D magnetic equilibrium and up-to-date first wall have been carried out to revise the measurement requirements for the lost alpha monitor in ITER. In agreement with recent observations, the simulations presented here suggest that a pitch-angle resoluti...
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ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 2012
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.4732063