PPT Slide

RFCD Efficiency Scaling w.r.t. Te and Zeff

• Using the same equilibrium, normalized RFCD efficiency, _B = IpR/Pcd,

is calculated as and Zeff are varied.

- n,T profiles are adjusted to give maximum bootstrap alignment without

overdrive. So, profile peakedness and Ibs/Ip vary, but within a narrow

range.

• Under these conditions, good CD

efficiency is obtained at higher Zeff

and > 17 keV, where there is

less seed current to drive.

• Current profile matching can be

reasonably achieved by adjusting

RF spectra, except at low

and high Zeff, where the calculated

CD efficiency is less reliable.

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