A Collaborative National Center for Fusion & Plasma Research

Metered Evaporator for Tokamak Wall Conditioning --- Inventor(s): Charles H. Skinner, Dennis Mansfield, Henry Kugel, Hans Schneider and Lane Roquemore

A novel lithium evaporator for the controlled introduction of lithium into tokamaks for wall conditioning is described.  The concept uses a Li granule injector with a heated in-vessel yttrium crucible to evaporate a controlled amount of Li onto tokamak plasma facing components for wall conditioning purposes.  The evaporator thermal mass is low and the evaporation/cool down time is short (about a minute) and avoids the need for complicated shutters to control the evaporation.


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