[time-nuts] Modern Rb atomic reference vs classic Cs

[Dana Whitlow]

Clearly the muQuans clock is a horse of another color from our usual Rb
standards.
Considering its size and weight, shipping it back to the mfr every few
years would
be a royal pain, too.

I looked over the datasheet and could find no mention of the active atomic
species
in use.  Is it Rb for sure?

Dana


On Thu, Mar 19, 2020 at 4:53 AM Paul Boven <p.boven at xs4all.nl> wrote:

> Hi Attila, list,
>
> On 3/17/20 9:51 PM, Attila Kinali wrote:
> > At those prices, I'd rather go for a µQuans or SDS Rb clock.
> > Those don't lose atoms like the Cs beam does and thus don't need
> > a refill. Their lifetime is more likely in the decades than just
> > a few years. Weakest link, as far as I know, are the lasers.
> > And yes, after the second, at latest after the third Cs tube,
> > these Rb devices are cheaper. And they are as much a primary
> > standard as the 5071 is.
>
> We've actually looked into purchasing the muQuans Rb. We learned from
> the vendor that they need to be serviced and refilled every four years,
> which could possibly be stretched to five years. This entails sending
> your clock back to the manufacturer. Otherwise, it simply runs out of Rb.
>
> Given that we were going to deploy these in rather remote locations, we
> decided that the repeated shipping and down-time was just going to be
> too difficult to deal with.
>
> Regards, Paul Boven.
>
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