ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
The poloidal field profile in the Texas Experimental Tokamak is determined from the analysis of circular polarization of the forbidden (magnetic dipole) line Ti xvii 3834 A(ring). A high-sensitivity polarimeter measures the difference between right- and left-hand circularly polarized line profiles, a quantity which is directly proportional to the magnitude of the magnetic field component in the direction of observation. The fractional circular polarization smaller than 10−2 can be detected, which allows determining the poloidal magnetic field in the center of the plasma with uncertainty as small as 50 G. The instrumentation is relatively simple and inexpensive. Description of the polarimeter and results of measurement of the poloidal field profile and the safety factor on the tokamak axis are presented.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1140168
