Hi Do you believe that they could produced in volume for < $1,000 each without any significant setup investment?
Bob > On Nov 3, 2016, at 7:52 PM, Bruce Griffiths <bruce.griffi...@xtra.co.nz> > wrote: > > Attached graph indicates ADEV achieved with a 25mm double resonance Rb vapour > cell > Performance appears somewhat better than HP5065A (even Corby's souped up > version). > The thesis (by Thejesh N. Bandi) on this double resonance Rubidium vapour > cell in a Magnetron style cavity was completed at the University of Neuchatel. > Bruce > > On Friday, 4 November 2016 11:58 AM, Bruce Griffiths > <bruce.griffi...@xtra.co.nz> wrote: > > > There is at least one recent thesis where a dual resonance rubidium vapor > cell was built and used to lock a low noise OCXO,The machining of the cavity > didnt appear particularly challenging nor did the locking of the laser to the > relevant wavelength using an auxiliary rubidium vapour cell.IIRC thee > performance was better than the telecom market rubidium standards. > Bruce > > On Friday, 4 November 2016 11:34 AM, Attila Kinali <att...@kinali.ch> > wrote: > > > On Thu, 3 Nov 2016 16:54:24 -0400 > Bob Camp <kb...@n1k.org> wrote: > >> If you look at a modern CPU as “just a handful of sand and some stuff”, it >> seems >> pretty easy to build one in the kitchen after an hour or two of setup. When >> you dig >> into the nasty details the line costs rapidly spiral off into the >> stratosphere. Atomic >> standards are not quite as complex, but there still is more than just a >> little custom >> equipment involved. $1M sounds a bit on the low side of what it might take. > > > Not necessarily. There is a large corpus of knowledge available on > how to build vapor cells standards and what is a good idea and what > isn't. Most of it is documented in papers of the PTTI, EFTF and IFCS. > The former two are freely available (for PTTI until 2010, but that > should be good enough). Getting access to those papers behind a > paywall, you only need to know someone with access to a university. > (not for PTTI post 2010 though, ION has quite anal access rules) > > Additionally, the people in the time and frequeny community are very > open to discussion and exchange of knowledge. You can almost always > just walk up to someone and ask questions with a high chance of getting > not only answers but help in how to proceede. > > Tapping into this knowhow would avoid the need to try out the whole > solution space and concentrate on the few parts that are unkown or > not well enough understood and optimize those. And by doing so safe > a lot of money. > > Attila Kinali > > -- > Malek's Law: > Any simple idea will be worded in the most complicated way. > _______________________________________________ > 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. > > > > _______________________________________________ > 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. > > > <ADEV_25mmDRRb.GIF>_______________________________________________ > 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. _______________________________________________ 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.
