to(roidal'naya) kam(era s) ak(sial'nym magnitnym polem ) ‘toroidal chamber with axial magnetic field.’
HBT-EP was designed to demonstrate the feasibility of a high-beta tokamak stabilized by a combination of a close-fitting conducting wall, plasma rotation, and active feedback. The specific approach taken by HBT-EP was to investigate the combined use of a close-fitting conducting wall and modular saddle coils for the purpose of significantly extending the tokamak beta limit.
HBT-EP is a unique experiment for the investigation of wall-stabilization being the only tokamak device built with adjustable walls and having a vacuum chamber made with several quartz cylindrical breaks. These breaks allow fast penetration of externally-applied magnetic perturbations. HBT-EP has accelerated magnetic islands of nearly sonic speed and the device has been used to access the Troyon normalized beta limit with ohmic heating alone.
HBT-EP has ohmic parameters in the range given by:
D. Gates' thesis provides a brief but comprehensive primer on most of the diagnostics and equipment composing the HBT-EP experiment. Though some aspects are out of date, it can and should be used as a first point of reference to understand how the various pieces of the machine function together.
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|Ferritic Wall||Soft X-Ray||Data Acquisition||Hall Probe|
|Poloidal Sensors||Thomson Scattering||Power Amplifiers||Bias Probe|
|Toroidal Sensors||Fast Camera||CPCI||Mach/Float Probe|
|Rogowski Coils||D-Alpha||Signal Amps||Rotation|