PPPL-4164 is available in <a href="PPPL-4164.pdf">pdf</a> format (424 KB).

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<b>Enhanced Confinement and Performance in a Low Recycling Tokamak</b>
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<b>Authors:</b> R. Majeski, R. Doerner, T. Gray, R. Kaita, R. Maingi, D. Mansfield, J. Spaleta, V. Soukhanovski, J. Timberlake, and L. Zakharov
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<b>Date of PPPL Report:</b> June 2006
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<b>Submitted to:</b> Physical Review Letters</p>


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Extensive lithium wall coatings and liquid lithium plasma-limiting surfaces reduce recycling, with dramatic improvements in ohmic plasma discharges in the Current Drive eXperiment&ndash;Upgrade (CDX-U). Global energy confinement times increase by up to 6&chi;. These results exceed confinement scalings such as ITER98P(y,1) by 2&ndash;3&chi;, and represent the largest increase in confinement ever observed for an ohmic tokamak plasma. Measurements of D<sub>&alpha;</sub> emission indicate that global recycling coefficients decrease to approximately 0.3, the lowest documented for a magnetically confined hydrogen plasma.




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