High-performance Upgrade Of X-ray Crystal Spectrometer And Experimental Study Of ICRF Flow Drive On EAST

Plasma rotation plays an important role in L-H transition,suppression of magnetohydrodynamic instabilities(e.g.resistive wall mode)and formation of internal transport barrier.In this dissertation,upgrade of X-ray crystal spectrometer and experimental study of toroidal rotation induced by ion cyclotron range of frequency(ICRF)on EAST are introduced in detailsTwo X-ray crystal spectrometers(XCS),including a poloidal and a tangential system,are upgraded with vibration mitigation system.A bellows is used to isolate the vibration source from tokamak and an optical table is used to mitigate the vibration from support platform.A high accuracy crystal holder is employed to precisely adjust the angle of crystal and a guide rail is used to allow the horizontal movement of detector A new larger pixelated two-dimensional detector is used in the poloidal system,expanding the measurement range and being able to steadily work in long-pulse discharges.A new two-crystal is implemented in the poloidal XCS to simultaneously diagnose high-and low-temperature plasmas using He-like argon spectra and Ne-like xenon spectra,increasing the range of temperature measurement to 10 keV.A scheme based on X-ray tubes is proposed for full-space and real-time wavelength calibration of XCS,and its feasibility is verified through bench testsBased on XCS diagnostic,different rotation behaviors are observed under different discharge conditions.In Ohmic plasma,central toroidal rotation is found to increase in the direction of plasma current and ion temperature gradient in ??0.3 region increases obviously after the injection of ICRF waves.Both co-and counter-current rotation induced by ICRF and sensitivity of rotation to electron density are observed in lower hybrid current drive(LHCD)plasma.The rotation change is not dominant by safety factor as rotation changes faster than safety factor.In a discharge where plasma entered H-mode during ICRF heating,40 km/s co-current rotation change is observed after L-H transition.When type III edge localized mode(ELM)appears,rotation decreases due to the increase of neutral particles in the edge.ICRF waves are found to slow down central toroidal rotation under either co-or counter current neutral beam inj ection(NBI)plasmas.In counter current NBI heating plasma.rotation in the outer region first respond to the inj ection of ICRF waves,and then does the central rotation.Change of fast ion behaviors are observed after ICRF heating.In co-current NBI discharges,core plasma rotation changes greater in counter current derection than outer region,and rotation in p>0.6 region increases parallel to plasmacuurent in p>0.6 region.