JT-60U MONTHLY SUMMARY
OPERATION AND CONFINEMENT PHYSICS
Parameters used in the real-time feedback control of position and shape
of JT-60U plasmas were fixed for the new divertor configuration. With the
newly developed prediction code for equilibrium calculation, plasma configurations
were examined for optimizing the discharge scenario toward the steady state
CURRENT DRIVE AND HIGH ENERGY PARTICLE PHYSICS
To increase ICRF power coupled to plasmas, stub tuner of the ICRF system
has been modified to a type with higher withstanding voltage. Coupling studies
of ICRF and LHRF for modified divertor configuration are scheduled soon
after the restart of operation.
DIVERTOR AND BOUNDARY PHYSICS
Calibration and alignment adjustment of the measurement systems in the vacuum
vessel were finished on May 11. The construction of the divertor modification
was completed on May 15.
The detailed procedure in the first experimental week was discussed on the
following subjects; 1) optimization of divertor configurations, 2) studies
of gas puff characteristics(effects of gas puff location, time response,
fueling rate etc.) and 3) divertor pumping characteristics (pumping speed,
pumping test with fast shutter valves, relationship of pumping efficiency
and separatrix location etc.).
Review of JT-60U experimental results obtained from February to November
1996 has been published in JAERI-Research 97-047, where 68 papers are contributed
from the JT-60 Team.