[Objectives]
To measure radiation power profile of the main plasma core and the divertor
plasma.
[Detectors, Diagnostic Method]
-Array of gold plated on a thin polyimid film bolometers
[Bolometer I] looking from several diagnostic port to cover the whole
poloidal cross section
-Angle between each viewing cords is ~3degree for the upper
half (main plasma) -Increased spatial resolution with 1.2degree ~ 0.7degree for the divertor
zone
-To enhance the capability of local measurement near the divertor plate
and the x-point bolometers using a mica foil for
higher temperature[Bolometer II] have been installed inside the new
W-shped divertor chamber on May 1997.
-Bridge amplifiers with DC bias voltage[Bolometer I] and AC voltage with
20 kHz carrier frequency[Bolometer II]
[Specifications]
-Sensitivity
: 1-2 1/watt
(
Resitance change per
unit power at room temperature)
-Spatial resolution
: 5~6 cm in vertical near
the plasma center ~3 cm at the divertor region.
