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Re: IGBT's, pulsed power (was Re: Waveguide TC)



Original poster: "Greg Leyh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <lod-at-pacbell-dot-net>

Yes, that's about right.  Beam time can get pricey, hence the heavy
emphasis on machine reliability and efficiency.  An engineer who
improves the machine operating efficiency by even 1/3 of a percent
has earned their salary for the lifetime of the machine.

Typically a machine like this would have a brown-out schedule,
where beam time (or energy) would be reduced in phases as the
total energy consumption approached various administrative limits
on billing cycle usage.  SLAC has administrative operating modes
at 55MW, 21MW, and 17MW.

IMO a site power requirement over 300MW will seriously narrow the
selection of prospective sites in the US, even with the natural-gas
fired local co-gen power plant option called out in the Conceptual
Design Report.

It seems likely that the site power requirement will get trimmed
back somewhat, if the NLC is built in the US.



>Original poster: "Jim Lux <jimlux-at-earthlink-dot-net>
>
>360 MW is still a heap o' juice, though... at $0.10/kWh, it's going to cost
>$36000 per hour.. Presumably they don't plan to run the thing when spot
>rates are high...
>
>
> > Sorry, I didn't denote that the 75MW is the *peak* output
> > rating of the klystron.
> > The duty factor here is *extremely* low -- the total site
> > power should average less than 360MW.