[volt-nuts] Low-cost Josephson Junction Array

[Tom Knox]

Hi Ken;

There is a lot more to a voltage standard then the Zener, a very reasonably priced alternative to a JJA may be a Fluke 732A.

These boxes have been in use for years and their characteristics have been extensively documented.

This link may also be of interest.

https://www.google.com/search?q=zenner+732a&ie=utf-8&oe=utf-8

Cheers;

Thomas Knox



________________________________
From: volt-nuts <volt-nuts-bounces at febo.com> on behalf of Ken Peek <ken.peek at diligentminds.com>
Sent: Wednesday, October 19, 2016 4:35 PM
To: volt-nuts
Subject: Re: [volt-nuts] Low-cost Josephson Junction Array

@Vince:

Thank you for the link!  Very informative!  There is also a nice video
showing some of the lab techniques, and some cautions working with
cryogenic liquids.

I would also like to explore miniature cryocoolers-- as these might be able
to support a small lower power array (1V) if it doesn't dissipate too much
power...

There is already some progress in this area with a QHR made from graphene
(at the NPL in the UK).  So, maybe the same cryocooler could be used also
for the low-cost JJA ?

Having a 10V (fixed output) JJA and a 12K9 QHR would be the basis to
calibrate all other electrical standards in a lab.  It would be nice to
have these sitting in their cryocoolers cranking out volts and ohms
practically indefinitely (or as long as you want)-- and if one has even a
rubidium atomic clock, then no external signals or standards of any kind
would be needed.  Well, that and a triple-point of water cell (which I
have) for temperature calibrations.

-Ken
_______________________________________________
volt-nuts mailing list -- volt-nuts at febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
volt-nuts Info Page - American Febo Enterprises<https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts>
www.febo.com
volt-nuts is a low volume, high SNR list for the discussion of precise voltage measurement and related topics. To see the collection of prior postings to the list ...


and follow the instructions there.