Experimental program of ht 7 2001 fall campaign
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Experimental program of HT-7 2001 fall campaign. HT-7 team 2001.10. The goals to be achieved. Long pulse-length operation 5-10 s shot (>1keV,>100kA,>1x10 19 m -3 ) 、 Steady-state H-mode ( 100 time energy confinement time), try 20s plasma operation

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Experimental program of HT-7 2001 fall campaign

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Experimental program of ht 7 2001 fall campaign

Experimental program of HT-7 2001 fall campaign

HT-7 team

2001.10


The goals to be achieved

The goals to be achieved

  • Long pulse-length operation

    5-10 s shot(>1keV,>100kA,>1x1019m-3)、Steady-state H-mode ( 100 time energy confinement time), try 20s plasma operation

  • Preparing enough data for the invite talks for following conference: IAEA, PSI, EPS, APS。

  • 2-4 unique experiments

    IBW, LHCD, LHCD+IBW, RF conditioning.

  • Several technical improvements for SSO

    1MW CW LHCD、1MW CW ICRF、CW PF power supply and control、 ripple reduction、CW first wall and particle exhaust.


Physical program

Physical program

Plasma behavior of long pulse operation

  • Profiles measurements

  • edge plasma behavior

  • impurity transport

  • recycling

  • Er and shear flow

  • Energetic particles


Physical program1

Physical program

PWI under steady-state condition

  • RF conditioning (B, Si, Li) in the BT present

  • Real time D2 isotropic removing with BT

  • Heat and particle exhaust with new cry-pumps

  • Monitoring of FW (Te sensor, CCD)

  • Erosion and redeposition for the new graphite and coatings


Physical program2

Physical program

Plasma and wave interaction

  • Coupling for the new multi-junction LHW antenna;

  • Coupling for the new RF and IBW antenna;

  • impurities generated by new antennae;

  • Power deposition control with changeable N for both LHW and RF;

  • Energetic particles behavior with reduced ripple


Physical program3

Physical program

Profile controls:

  • Density by molecular beam injection (MBI from HFS and LFS) and RFH

  • Te by LHCD and IBW

  • j( r ) and MHD by LHCD

  • Er , EXB shear flow and ITB by IBW

  • P ( r ) by different wall coatings( B, Si, Li)

  • Edge radiation by Ne (Si) injection


Physical program4

Physical program

SS H-mode(>20 E), The synergy between RF and LHCD

  • H-mode by LHCD

  • H-mode by IBW

  • LHCD+IBW(mode-conversion ,direct launching),

  • LHCD+IBWCD

  • High density (>60% GW density limit) LHCD+IBWH(5/2 D) trial


Experimental program of ht 7 2001 fall campaign

Physical program

  • Transport and confinement

  • Scaling of E and P

  • Perturbation of density by GP and SSB

  • Perturbation of temperature (relaxation) by IBW

  • MHD during LHCD and IBW

  • Zonal Flow, SOC, Rynold Stress


Physical program5

Physical program

new diagnostics

  • Omegatron

  • IR CCD

  • neutron detector

  • FRC fast ECE

  • fast-moving Langmuir probe

  • S-X diode spectroscopy

  • CO2 laser scattering

  • HT-7U R&D (SXA, MP)


Advanced control for steady state operation

Advanced control for steady-state operation

  • Fast particle loss reduction with reduced ripple (Fe steel inserting in VV);

  • CW PF power supply and real-time plasma control;

  • Radiative mental;

  • New RF wall conditioning trial( Si, Li);

  • New first wall material and limiter;

  • Different fueling techniques;GP,MBI,pellet

  • CW data acquisition.


Schedule of the experiments 24 h day 7 days week

Schedule of the experiments24 h /day, 7 days /week

  • Oct. 29:close of all windows

  • Oct.30-Nov.13:Vacuum and cooling down

  • Nov.14-15:RF wall conditioning and discharge

  • Nov.16-25:experiments mainly for new hardware and engineering testing

  • Nov.26-30:Long pulse trial

  • Dec.1—25 physics experiments;

  • Dec.25—30:postponed proposals

  • Dec.31 : The end


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