Questions like yours are what makes a good experimental physicist. As to vacuum tight, you use bellows or put the inchworm inside the vacuum.
As to RF leakage, a waveguide below cutoff is one way. Another is to design a choke seal, a 1/4 wave stub with a high Q cavity as the open end. -Jhn =============== > On Sun, 29 Aug 2010 10:03:02 -0700 (PDT) > "J. Forster" <j...@quik.com> wrote: > >> >> [snip] >> >> complicating aspect is the self-tuning stuff for which several >> >> strategies may be chosen. >> > >> > I'd start here at getting a cavity that is resonant at the frequency >> > at all. Getting sub-milimeter precision in tooling is quite easy >> > (given you have the tools and knowledge, or can pay someone to do it >> for >> > you), >> > but if the cavity has to be resonant within a couple of Hz of the >> > 1.4xxxGHz, then you have to get a precission in the range of 10^-9 >> > which basically impossible mechanically. So the cavity would need to >> have >> > a mechanical tuning system too, but one that doesn't lower the >> cavity's >> > Q or add any additional resonant modes. >> >> A tuning plunger driven with a Burleigh Inchworm, either through a >> bellows >> or with a vacuum Inchworm. > > Yes, but that's only half of the story. How do you make it vacuum tight? > And how do you design the end in the cavity so that you do not create > unwanted resonant modi? > > > Attila Kinali > -- > If you want to walk fast, walk alone. > If you want to walk far, walk together. > -- African proverb > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
