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A preliminary engineering design of a “Venetian blind” direct energy converter for fusion reactors

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5 Author(s)
Barr, W.L. ; Univ. California, Livermore, CA, USA ; Burleigh, R.J. ; Dexter, W.L. ; Moir, R.W.
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The device described reclaims the energy lost by the reactor through leakage of charged particles. Energy selection is accomplished through the angular dependence of transmission through a system of ribbon grids resembling a venetian blind. In contrast to previously described converters in which the beam of ions from the reactor is expanded in a flat fan-like expander, the beam in this device is expanded in two directions in a conical expander. Problems of grid construction, radiation damage, grid heating, and vacuum pumping are discussed. The efficiency is estimated to be 50% for a two-stage collector and 65% for a four-stage collector. Further development of the basic concept could possibly raise the efficiency to as high as 75%. Optimized designs might increase the power handled by a factor of several without significantly increasing the unit cost, thus greatly lowering the cost/kW.

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Plasma Science, IEEE Transactions on  (Volume:2 ,  Issue: 2 )