Abstract
Charge exchange diagnostics in a hostile neutron and gamma radiation environment require substantial shielding against radiation-induced noise signal. Minimizing the dimensions of the apparatus significantly reduces the shielding complexity. Conceptual designs for compact analyzers are presented. The reduced size is achieved primarily by employing high-field-strength (≤8 kG) permanent rare earth magnets to simplify magnetic field generation. In addition, a carbon foil is used in place of a gas cell to eliminate the customary analyzer vacuum pumping systems. Alternative designs employing electric and magnetic fields for mass and energy analysis will be presented that afford a reduction in volume by an order of magnitude compared with the E∥B analyzers currently in use on the tokamak fusion test reactor (TFTR).
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