Daily operation report Dec.17-18,

2002Physics group II

and operation group II

Outline

• Schedule

• Present systems and plasma state

• Problems

• New information

Schedule10:30-18:00 rehearsal of study on LHW i

mproving confinement (DBJ)

18:00-21:00 rehearsal of study on LHW improving confinement & coupling efficiency (SWC)

21:00-01:00 vertical displacement scan

01:00- longer LHW, ne scan

Systems & Plasmas (I)1 Vacuum and limiter temperature

inner chamber pressure ~2E-5 Pa

Better symmetry of Tlimiter rise by optimized vertical displacement control. deltaTMAX~10-15 degrees for 160kA*1s/250kW*0.3sLHW shots.

2 Cryogenic and toroidal fieldIt~4100A, leak detecting

3 Plasmas:For LHCD exp, mainly 160 kA, 1.5e19m-3.

4 LHWPmax~300 kW/~270-500 ms

Plasmas (II)deltaT on limiters & vertical displacement control

Shot 50032, south upper +10 K south lower +11K

North upper +5K north lower +15K

Plasmas (III)ne scanning

Similar Current Drive effect with ne above 2e19m-3.

Problems

1, LHW system (phase control);

2, ICRF system (trigger module, generator?)

3, Cryogenic system (He gas leak)

4, Diagnostics

New information

Collection of E-notes from every sub-systems. (to YAO Ai Ling)

NPA needs time for installation.