Abstract
Tandem mirror confinement properties are strongly influenced by the spatial distributions of density and temperature of the hot electrons in the thermal barrier and MHD anchor regions. The (IT)2 diagnostic system can provide time-resolved localized measurements of the x-ray emission profiles produced as a heavy energetic atomic beam passes through the hot-electron plasma. X rays are generated by collisions of the beam atoms and plasma electrons through the processes of bremsstrahlung and K-shell ionization. Analysis of the data from an array of collimated x-ray detectors viewing the path of the beam perpendicularly, coupled with a pulse-height energy analyzer, can yield the electron temperature profiles. Absolute calibration of the spectral response of the detectors to K-shell radiation permits the determination of the electron density distributions. Applications of the (IT)2 system to tandem mirrors and EBT will be discussed, as well as other applications of the intense atom beam.
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