[time-nuts] Ground state: Hans Dehmelt
Tom Van Baak
tvb at LeapSecond.com
Wed Apr 12 13:40:22 EDT 2017
In the news today...
Hans Dehmelt (1922 - 2017) passed away a few weeks ago. He shared the 1989 Nobel prize in Physics with Wolfgang Paul for his work on trapped ions, which have application in ultra-stable ion atomic clocks. While many of us still play with rubidium vapor or cesium beam standards at home, most of the world's top timing laboratories have long since moved to Rb/Cs fountain clocks, trapped ion clocks, and optical clocks.
If you google around you'll find lots of tech papers about ion clocks. JPL in particular has been very active in this area.
BTW, the other half of the Nobel prize that same year was Norman Ramsey (1915 - 2011) for his work on separated oscillatory fields. Many of you know this as the technique that makes Cesium frequency standards work so well. Oh, and Ramsey made the first Hydrogen maser. So 1989 was a very good Nobel year for Physics.
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