TowardsSteadystateOperationinHT7課件.pptVIP

Towards Steady-state Operation in HT-7 Jiangang Li and HT-7 team Institute of Plasma Physics, Academia Sinica 3rd IAEA TCM on SSO, Germany/ France, May 2- 7, 2002 Content Technical improvements: Ripple reduction, CW PFP system, C limiter and exhaust system, new wave systems, new diagnostics RF wall conditioning: Boronization, Li coating, Li+Si coating IBW experiments LHCD experiments Synergy of IBW and LHCD Long pulse operation Steady-state H-mode H-mode by LHCD ITB-like profiles The detail of the synergy 10s high performance discharge Ip=104kA, ne0=1.2x1019m-3, BT=2.0T, PLHCD=140kW 20s reproducible hot plasma discharge Ip=50kA, ne0=1.0x1019m-3, BT=1.9T,PLHCD=135kW Steady-state H-mode Steady-state I-mode Conclusion Significant improvements have been made in HT-7 during 2001 experimental campaign. Several technical improvement have established the base for steady-state operation. Quasi-state operation of 1000 times of energy confinement time hot plasma has been obtained. RF wall conditioning techniques have been developed which is very useful for future large superconducting devices. IBW has been carried out which might be used in controlling profile and the shear flow and H-mode has been obtained. LHW driven H-mode with ITB has been produced. SS H-mode with more than 100 energy confinement time has been achieved by combining LHCD and IBW. * HT-7 ASIPP HT-7 ASIPP The H-mode by IBW Improved energy and particle confinement, decreased xe, (by heat pulse propagation) HT-7 ASIPP HT-7 ASIPP H-factor reaches 1.5 with 450kW tH/?E = 42 was obtained Te increased during H-phase ?E increase by a factor of 3 HT-7 ASIPP Synergy of IBW and LHCD HT-7 ASIPP Ip =200kA, BT =2T, PIBW = 200kW f =30MHz, PLHCD =500kw, f=2.45GHz HT-7 ASIPP HT-7 ASIPP HT-7 ASIPP Ip=215kA, ne0=2.6x1019m-3, BT=2.0T, PLHCD=250kW,PIBW=130kW, Te =2.9keV, Ti=1.6keV, H89=1.6, tH/tE=53 HT-7 ASIPP Ip=135kA, ne0=2.2x1019m-3, BT=1.8T, PLHCD=190kW,PIBW=80kW, Te =1.5k