Solar Furnace Suns Concentration

> Is it possible to direct a beam of 15,000 suns from the focal point
> of a parabolic mirror down a path into a furnace chamber?
>

where would you find 15,000 suns ? :-)

>
> I know the easiest solution is to have the focal point be right in
> the furnace chamber but I'm trying to look at the issue of the
> layout of a materials processing facility and it would be easier to
> design the workflow if the beam could be channeled into the furnace.
>

What you describe is commonly referred to as a collimated beam.

Sure, you can make a collimated beam using a "telescope". This is a
device invented by the Italian scientist Galileo Galilei in the 16th
century IIRC.

Galileo's design used two lenses, and is known as a refractor. There
are a wide variety of telescope designs you could use, employing a
variety of combinations of lenses and/or mirrors.

>
> I guess a part of my question is how well a polished surface can
> reflect and channel a beam of energy of 15,000 suns? What material
> would be considered for the channeling tunnel?

You need a primary mirror or lens, combined with a secondary mirror or
lens.

The "channeling tunnel" does not need to be made of any material at all.

Just a straight hollow tube through which the parallel beam passes, the
ideal material would be a vacuum, to eliminate transmission losses
caused by other media.

Or do you want the beam to go around a corner ? That would involve
optical fibres, but that is a poor way to transmit high energy, optical
fibres are inefficienct and will dissipate a huge amount of heat.
Conventional optical fibres would melt at the power levels you are
describing.