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Direct energy convertor for UW tandem mirror reactor

In a Tandem mirror reactor, the end loss ions can be preferentially leaked out one end and hot electrons out the other. A single stage regular Plasma Direct Convertor (PDC) at the ion end to recover the ion power and a simple thermal dump at the electron end were considered by the reactor design team at LLL. Such a convertor has the net efficiency of 64% and would be as high as 77% if the 3.5 MeV /alpha/-particles can be recovered, which is the largest single loss. Another large loss is due to energy spread. A very important question, the neutron steaming out the ends, was not addressed in that design. In this study, an attempt was made to find solutions to these problems.