[time-nuts] Collaboration helps make JILA strontium atomic clock 'best in class'

2008-02-17 Thread christopher hoover
More technical details here: http://www.physorg.com/news10149.html 1x10-16 fractional uncertainty! -ch ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and

Re: [time-nuts] Aging rate of crystals

2008-02-17 Thread Thomas A. Frank
The best experiment I can think of to prove this is to run the oscillator in a paper bag until it is stable, then trickle a flow of dry nitrogen into the bag for a day or two and watch for oscillator drift as the humidity in the oven drops to extremely low values. It is a pity that I do not

Re: [time-nuts] Aging rate of crystals

2008-02-17 Thread Richard (Rick) Karlquist
At the beginning of the E1938A project, I did a bunch of characterization of 10811 oscillators. At the Santa Clara Division, we had first class environmental test chambers with heating, cooling, humidification, de-humidification, and nitrogen purge. The nitrogen was also available for fast