Re: RF Conductivity of thin Mo film

Uncle Al wrote:
> Peter Simon wrote:
>
> > "Uncle Al" <[EMAIL PROTECTED]> wrote in message
> > news:[EMAIL PROTECTED]
>
>
> [snip]
>
>
> > > The simple (riiight) solution is to have a film periodically pulled
> > > across betwen the source and the deposition target.  The crud deposits
> > > on the film and is moved away; the aperture stays clean.  Mylar is
> > > fragile in a bunch of ways, but poly(ethylene naphthalate) is much
> > > better and Kapton much better still.  Now you can sweat the MTBF of
> > > the film and its transport mechanism.
> >
> > That's a very interesting suggestion, which I will transmit to my coworkers.

Al, this is the same technique several people used in laser ablation of 
superconductors to keep the windows clean of deposits from the plume 
from the target material. So commercial vacuum manufacturers have made 
this already and seems like it only needs to be scaled up to meet his needs.